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Manual Gearbox - 3 Synchro Internal Components

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Welcome to Somerford Mini Ltd.<br />

Somerford Mini Limited was established in 1990 by Peter Hines, a Mini enthusiast. The<br />

company has been very successful and now boasts a huge spares department alongside<br />

the original restoration business. Manned by restorers with a deep passion for (and vast<br />

knowledge and experience of) the Mini, our workshop enjoys a reputation as one of the<br />

country’s leading Mini restoration centres. With the spares and restoration departments<br />

together as a team, we have the full blessing of MG Rover, through being a British Motor<br />

Heritage Approved Specialist. We are justifiably proud of this accolade.<br />

The spares side of the business started in 1994 and has grown at an incredible rate. We<br />

now stock over 8000 lines, with more being added all the time. We cater for all Minis,<br />

from 1959 to the end of production in 2000, with the parts needed to carry out a full<br />

restoration, including very specialised body fittings that are not otherwise widely<br />

available. Other stock ranges from service items right the way through to accessories,<br />

performance parts and all the latest gizmos to dress up your Mini.<br />

Somerford Mini Limited is still a small enough company to guarantee a personal service,<br />

a very important consideration. Unlike many of our competitors, we can offer proper<br />

advice before you make your purchase. We know from our own workshop experience<br />

what works and what doesn’t, so if you’re not sure about something please ask – the<br />

chances are we can help. Our workshop is also able to fit any part we sell, if you so<br />

choose. We take a pride in being totally honest with our customers and not making<br />

false promises (tales of which you hear only too often with some mail order companies).<br />

We look forward to helping you to care for your cherished Mini.<br />

Peter Hines<br />

Somerford Mini Limited.<br />

Ordering Parts<br />

When ordering parts, it is very helpful if you also provide us with information about<br />

your car. Details such as the chassis number (or vehicle identification number on<br />

later models), engine number, year of manufacture, whether the car is right or left<br />

hand drive and details of any modifications will all help to ensure you get the parts<br />

you need.<br />

You can order parts by telephone, fax,mail, e-mail, through our website, or<br />

alternatively you would be most welcome to visit our shop during normal trading<br />

hours (Monday to Friday 9.00am to 6.00pm, Saturday 9.00am to 2.00pm, Sunday<br />

closed). We provide a range of methods of despatch for your order, from regular<br />

post through to next day courier delivery. Sometimes the method of despatch is<br />

dependant on the weight or size of your order. We are of course happy to give you<br />

a quotation, including delivery costs, before you place your order with us.<br />

Using This Catalogue<br />

Illustrations and Illustration Numbers: The illustrations are carefully<br />

crafted to guide you to the parts you want for your car. Each assembly is depicted<br />

in an exploded format and for consistency,where practicality permits, the view is from<br />

a left hand front three quarter angle (we’re also aware that many customers use<br />

catalogues as a visual guide to the assembly procedure of their car!). If only one hand<br />

is illustrated of a part with right and left hand versions, both hands will be listed under<br />

the matching illustration number in the text, usually with the right hand listed first.<br />

Part Number: A part number is the identifying name for a part in our stock<br />

control system, and differentiates between versions – right hand or left hand, early or<br />

late model. We ask you, where you can,to use part numbers when ordering – it helps<br />

to guarantee you get the exact parts you need. If you can’t work out which part<br />

number or you’re having difficulty working out exactly what it is you need, please<br />

contact us. We are only too happy to guide you or work it out for you.<br />

Description: We need to clarify here what we mean by right and left hand. Right<br />

and left hand is always taken from a viewpoint of sitting in the car,not from standing<br />

in front of it. So why don’t we say ‘offside’ or ‘nearside’ Because offside for a right<br />

hand drive car is nearside for a left hand drive car (you can see how this becomes<br />

easily confused…).<br />

Quantity Required: This is always the quantity required per car. For example,<br />

if two bolts hold a hinge, and there are four hinges on the car, the quantity required<br />

will be shown as 8, not 2.<br />

Remarks: This is additional descriptive information to help you identify the part<br />

you need, to tell you exactly what you’ll receive if you order that part, or to make you<br />

aware of an available alternative. It does this by telling you to which models or in<br />

which years a part was originally fitted (if there is a choice), or what that part includes,<br />

or whether that part can be used on other models.<br />

Parts Availability<br />

While the great majority of the parts listed in this catalogue are currently available,<br />

there are some that are not. A few of the parts shown in this catalogue are there in<br />

anticipation of what may become available in future (new or reintroduced products are<br />

constantly under development). A handful of others are there to historically acknowledge<br />

what would have originally been fitted and are, where possible, accompanied by an<br />

alternative, serviceable product. It therefore follows that this catalogue does not<br />

constitute a definite offer for sale of any particular item.<br />

In the accompanying price list, a price beside the part number indicates that the part<br />

is usually available; if the part number is absent it indicates non-availability. If the<br />

comment ‘use’ (followed by a different part number) is found, the original part has been<br />

superseded by an available alternative.<br />

Overseas customers should note that sometimes shipments will be subject to local<br />

import duties, which are not included in the price we charge for your order, or the<br />

delivery costs. These duties must be paid by you before you can receive your<br />

shipment. Value Added Tax at the current United Kingdom rate will be levied on all<br />

orders despatched to countries within the European Community, but will not be<br />

levied on orders despatched to the rest of the world.<br />

We accept payments for orders by cash, personal cheque, bank draft, Sterling<br />

travellers cheque and most credit or debit cards, including Visa,Mastercard, Maestro<br />

(Switch) and Delta. If you intend to pay by personal cheque or bankers draft, we<br />

would advise you to ask for a parts availability check and quotation before placing<br />

your order.<br />

Copyright<br />

Copyright Somerford Mini Limited October 2006 (second edition, September 2008). All<br />

rights reserved. No part of this publication may be reproduced, stored in a retrieval system,<br />

or transmitted in any form by any means, electronic, photocopying, recording or otherwise<br />

without prior written consent of Somerford Mini Limited.<br />

British Motor Heritage Approval<br />

Somerford Mini Limited is a British Motor Heritage approved specialist. Our agreement<br />

with British Motor Heritage permits the use of certain marque logos and some of the<br />

artwork contained in this catalogue. The remainder of the artwork is the intellectual<br />

property of Somerford Mini Limited.<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Change Points<br />

In the catalogue you will see parts changes referred to by dates. We have steered away<br />

from the tradition of listing change points by chassis or commission number (they’re<br />

different,and the factory parts books used both) because they are so complicated on<br />

Minis. All the models had different change points until 1984 (after which it got much<br />

easier) and to list change point numbers often amounts to half a page of text!<br />

better town car, which in some other respects it undoubtedly is. Also, refinement is not<br />

the automatic’s greatest feature; it changes gear rather a lot (often downwards),<br />

subjecting the car’s occupants to even more noise than in a manual Mini.<br />

It is surprising that the innovative and promising Mini automatic was largely starved of<br />

development during its 35 years in production, major changes being confined to the the<br />

gearchange mechanism, plus the introduction of A Plus drop gears in 1982.<br />

As a result, we’ve used years instead. While much more simple, we acknowledge that<br />

using dates to portray change points is not perfect. For example, you will know the<br />

year of registration of your car but you might not know the year of manufacture - the<br />

two aren’t necessarily the same. Also, a revised part was often introduced during a year<br />

rather than at the beginning or end of it. If you have difficulty in establishing which<br />

part is for your car,you will find a list of Mini models production history at the end<br />

of this catalogue which may help. If it doesn’t, contact us, preferably with your chassis,<br />

commission or engine number to hand, and we’ll do our best to sort it out for you.<br />

Mini Transmissions<br />

The manual gearbox created for the Mini in 1959 was an essential factor in the<br />

amazing space efficiency of the car. Developed from the gearbox used by BMC’s other<br />

A Series-engined cars of the time like the Morris Minor (and sharing many of the<br />

gearbox internals), the Mini gearbox was the first to be positioned under the engine.<br />

This allowed the entire power unit to be mounted transversely in the car, keeping the<br />

area occupied by it to a bare minimum.<br />

Gear selection was made by a long gear lever (‘direct change’), remembered affectionately<br />

as the ‘magic wand’ or ‘pudding stirrer’ by those who owned early Minis. Power was<br />

transferred from the engine and clutch down to the gearbox via a series of three gears<br />

colloquially referred to as the drop gears; the design initially allowed oil onto the clutch<br />

all too frequently, causing severe slippage. The sealing system had to be quickly<br />

redesigned and a programme was carried out to modify the Minis built thus far.<br />

After this hiccup the Mini gearbox settled down to a reasonably trustworthy existance.<br />

It was, however,still subjected to many improvements through the years and apart from<br />

the basic shape of the gearbox case very little of the 1990s Mini gearbox is recognisably<br />

the same as that on early cars.<br />

Most of the modifications centred on improving the gearchange - a remote gearchange<br />

arrived in 1961 (for several years fitted only to Coopers, it had the additional benefit<br />

of considerably steadying engine movement), cone synchromesh gave way to baulk rings<br />

in 1962, a proper synchromesh gear replaced the old ‘crash’ first gear in 1968 and the<br />

remote gearchange plus the gear selectors were replaced by a system known as ‘rod<br />

change’ in 1973.<br />

Two other major design modifications are worthy of note, both involving quietening the<br />

gearbox. Around 1963-64 the angle of the gear teeth was changed (post-modification<br />

gears being known as B Type and pre-modification retrospectively becoming A Type).<br />

This happened again around 1982 (the new gears being known as A Plus), bringing the<br />

Mini gearbox in line production-wise with the recently introduced Austin Metro. Exact<br />

identification of a Mini manual gearbox prior to replacement of gears is therefore of<br />

paramount importance - different angled gear teeth will not mesh together!<br />

Automatic transmission arrived in the Mini for 1965. A special automatic specification<br />

engine block had to be cast, a fact not lost on Mini owners who have converted their<br />

cars from automatic to manual and had to change the engine as well as the gearbox.<br />

The Mini automatic has significantly worse fuel economy as well as poorer acceleration<br />

than that managed by manual Minis, detracting from the automatic’s claim to be the<br />

Opinions concerning Minis fitted with automatic transmission entrench the enthusiast<br />

fraternity, the vast majority believing that the only good thing you can do with an<br />

automatic Mini is to convert it to manual. Yet the automatic Mini still does have its<br />

supporters, not least in Japan, the Mini’s biggest market in the 1990s, where nearly all<br />

of the Minis sold were automatics because of that country’s highly congested city roads.<br />

Contact Us<br />

Somerford Mini Limited<br />

Unit 2 Broadfield Farm,<br />

Great Somerford, Chippenham, Wiltshire, SN15 5EL<br />

e-mail spares@somerford-mini.co.uk<br />

Tel. 01249 721421 Fax. 01249 721316<br />

Opening Times<br />

Monday to Friday: 9.00am to 6.00pm<br />

Saturday: 9.00am to 2.00pm Sunday: Closed<br />

Contents<br />

<strong>Manual</strong> <strong>Gearbox</strong> - Flywheel and Clutch 2<br />

<strong>Manual</strong> <strong>Gearbox</strong> - Flywheel Housing and Clutch Cover 4<br />

<strong>Manual</strong> <strong>Gearbox</strong> - Clutch Pedal and Hydraulics 6<br />

<strong>Manual</strong> <strong>Gearbox</strong> - Primary, Idler and 1st Motion Shaft Drive Gears 8<br />

<strong>Manual</strong> <strong>Gearbox</strong> - External <strong>Components</strong> 10<br />

<strong>Manual</strong> <strong>Gearbox</strong> - 3 <strong>Synchro</strong>mesh <strong>Internal</strong> <strong>Components</strong> 12<br />

<strong>Manual</strong> <strong>Gearbox</strong> - 4 <strong>Synchro</strong>mesh <strong>Internal</strong> <strong>Components</strong> 16<br />

<strong>Manual</strong> <strong>Gearbox</strong> - Selectors and Speedometer Drives 18<br />

<strong>Manual</strong> <strong>Gearbox</strong> - Direct and Remote Gearchanges 20<br />

<strong>Manual</strong> <strong>Gearbox</strong> - Rod Gearchange 22<br />

Automatic Transmission - Torque Converter and Housing 24<br />

Automatic Transmission - Transmission <strong>Components</strong> 26<br />

Automatic Transmission - Gearchange Controls 28<br />

Final Drive (Differential) 30<br />

Mini Production History 32<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk 1


<strong>Manual</strong> <strong>Gearbox</strong> - Flywheel and Clutch<br />

© Copyright Somerford Mini Limited<br />

2<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - Flywheel and Clutch<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Flywheels<br />

Coil Spring and Diaphragm Spring Clutch Types, 1959-82<br />

1 22A129 FLYWHEEL ASS’Y,two piece, oil-fed 1 1959-62; coil spring clutch. Replaces<br />

bush type<br />

DU bush flywheel on earliest cars.<br />

22A443 FLYWHEEL ASS’Y,two piece, Deva metal 1 1962-63; 1 3/8" dia. Deva bush<br />

bush type<br />

machining and coil spring clutch.<br />

12G3014 FLYWHEEL ASS’Y,one piece , Deva metal 1 1963-82; 1 1/2" dia. Deva bush<br />

bush type<br />

machining, coil or diaphragm clutch.<br />

Originally there were several 1963 on two piece flywheel designs (i.e. the flywheel was bolted to a<br />

separate hub); all are now replaced by the later one piece flywheel.<br />

C-AEG619 FLYWHEEL ASS’Y,lightened steel type 1 For fast road and competition use.<br />

2 12G676 RING GEAR, starter motor, 1/2" wide 1 Included in standard flywheel ass’ys.<br />

22G2613 RING GEAR, starter motor, 11/32" wide 1 Included in C-AEG619 lightened<br />

flywheel assembly.<br />

22A130 GASKET, hub to flywheel 1 1959-62; included in oil-fed bush<br />

flywheel assembly.<br />

3 22A56 SCREW, hub to flywheel 6 Included in two piece flywheel ass’ys.<br />

4 LWZ606 WASHER, shakeproof 6 Included in two piece flywheel ass’ys.<br />

5 FNZ506 NUT 6 Included in two piece flywheel ass’ys.<br />

6 22A325 OIL SEAL, Nu-lip type 1 1959-61; for DU bush type flywheel.<br />

22A214 OIL SEAL, small 1 1961-62; for oil-fed bush type flywheel.<br />

7 2A3530 SCREW, flywheel to crankshaft 1 1959-63.<br />

22A747 SCREW, flywheel to crankshaft 1 1963-82.<br />

8 22A1155 LOCKTAB, flywheel screw 1 Included in 18G8086 clutch lock tab kit.<br />

9 88G508 KEY, flywheel to crankshaft 1<br />

Verto Clutch Types, 1982 On<br />

The Verto flywheel and clutch assembly was introduced as a means of lightening the effort required to<br />

operate the clutch (the older diaphragm clutch was a very strong and reliable design which<br />

unfortunately required an agricultural stomp of the foot, quite unbecoming in a new car by the 1980s,<br />

to operate it).<br />

As replacement par ts, Verto clutches were originally only supplied as balanced assemblies complete with<br />

flywheel, in an attempt to counter clutch judder in service. Nowadays, you can purchase the clutch<br />

components separately if you wish, but the flywheel is still only available as part of the (rather steeply<br />

priced) flywheel and clutch assembly.<br />

10 GCU90107AF FLYWHEEL AND CLUTCH ASS’Y, balanced 1 1982-85; for inertia starter fitted<br />

998cc models.<br />

GCU90115AF FLYWHEEL AND CLUTCH ASS’Y, balanced 1 1985-90; for pre-engaged starter<br />

fitted 998cc models .<br />

GCU90122AF FLYWHEEL AND CLUTCH ASS’Y, balanced 1 1990-94; for 998cc and carburetter<br />

fitted 1275cc models .<br />

GCU90121AF FLYWHEEL AND CLUTCH ASS’Y, balanced 1 1991-96; for SPi (single point<br />

injection) fitted 1275cc models .<br />

GCU90123AF FLYWHEEL AND CLUTCH ASS’Y, balanced 1 1997 on; for MPi (multi point<br />

injection) fitted 1275cc models<br />

plus SPi (Japan).<br />

11 12G2445 RING GEAR, 107 teeth 1 1982-85; included in iner tia starter<br />

flywheel assemblies.<br />

PSF10003 RING GEAR, 129 teeth 1 1985 on; included in pre-engaged<br />

starter flywheel assemblies.<br />

12 DAM5922 BOLT, locking, flywheel to crankshaft 1<br />

13 DAM5923 KEY, flywheel to crankshaft 1<br />

Clutch Kits<br />

14 - CLUTCH KIT, three piece, coil spring type 1 1959-64; kit not available - purchase<br />

parts separately.<br />

15 GCK100AF CLUTCH KIT, three piece, diaphragm type 1 1964-82.<br />

16 GCK149AF CLUTCH KIT, five piece, Verto type 1 1982-90; with 184mm diameter<br />

clutch plate .<br />

17 MHK51141 CLUTCH KIT, five piece, Verto type 1 1990 on; with 190mm diameter<br />

clutch plate .<br />

QKT313AF CLUTCH KIT, five piece, Verto type 1 Heavy duty; for use with Metro Turbo<br />

power unit.<br />

Clutch <strong>Components</strong><br />

Coil Spring Clutch, 1959-64<br />

At time of writing, components for the coil spring clutch fitted between 1959 and 1964 are hard to<br />

come by, to say the least. The later design diaphragm housing and/or clutch plate can be used to<br />

repair or replace a coil spring clutch in some instances: however by rule of thumb, the earlier the<br />

flywheel and crankshaft, the less likely this will be possible. On 1963-64 flywheels, it’s a straight<br />

replacement of coil spring clutch parts by diaphragm clutch equivalents. 1962-63 flywheels (i.e. those<br />

with the 1 3/8" machining for the Deva bush) will accept a diaphragm type clutch plate, but not a<br />

diaphragm housing. 1959-62 oil-fed bush type flywheels (can’t be many of these left now, surely - most<br />

were replaced with Deva flywheels in the 1960s) will only accept coil spring clutch components. If you’re<br />

unlucky enough to need to replace the clutch on one of these, a crankshaft, primary gear and flywheel<br />

swap will be required - or an engine swap,which might be cheaper and w ould certainly be quicker.<br />

Please contact Somerford Mini if you require replacement parts for a coil spring clutch assembly,<br />

giving us if possible as much detail as you can about the dimensions of the flywheel to which the<br />

clutch is to be fitted. The following are the original components for coil spring clutches:<br />

18 2A3509 PLATE, pressure 1 Not Cooper models.<br />

22A539 PLATE, pressure 1 997 and 998 Cooper, 1071 Cooper S.<br />

19 88G541 PLATE, driven 1<br />

20 22A214 SEAL, oil, small 1 For 1959-62 models with oil-fed<br />

bush type flywheels.<br />

21 2A3658 STRAP, driving 12<br />

22 2A3659 SCREW, strap 3<br />

23 2A3512 LOCK TAB, strap 3 Included in 18G8086 clutch lock tab kit.<br />

24 PWZ106 WASHER, plain 3<br />

25 22A87 HOUSING, coil pressure springs 1 Does not include springs .<br />

26 2A3657 SCREW, housing to pressure plate 3<br />

27 LWZ606 WASHER, shakeproof 3<br />

28 22A6 SPRING, pressure 6 Not Cooper models.<br />

22A275 SPRING, pressure , black with white spot 6 997 and 998 Cooper, 1071 Cooper S.<br />

colour coded<br />

29 2A3651 FLANGE, clutch release 1<br />

30 22A8 BOLT, housing to flange 3<br />

31 FNZ505 NUT 3<br />

32 51K1261 LOCK TAB, nut 3<br />

33 GRB201 BEARING, clutch release 1<br />

34 18G8086 LOCK TAB KIT, clutch 1 Includes lock tabs for strap and<br />

flywheel securing screws, plus lock tabs<br />

for spring housing screws.<br />

Diaphragm Clutch, 1964-82<br />

35 22A598 PLATE, pressure 1 Standard fitment; not Cooper models.<br />

22G270 PLATE, pressure 1 Standard fitment; Cooper and Cooper S .<br />

C-AHT230 PLATE, pressure 1 Lightweight; for fast road and<br />

competition use.<br />

36 GCP204AF PLATE, driven 1 Standard fitment - road use.<br />

C-AHT596 PLATE, driven 1 Uprated fitment - fast road or<br />

competition use.<br />

C-AHT598 PLATE, driven, sintered paddle type 1 Uprated fitment - competition use.<br />

37 2A3658 STRAP, driving 12<br />

38 2A3659 SCREW, strap 3<br />

39 2A3512 LOCK TAB, strap 3 Included in 18G8086 clutch lock tab kit.<br />

40 PWZ106 WASHER, plain 3<br />

41 GCC103 HOUSING, with diaphragm spring 1 Standard fitment - road use.<br />

C-AEG481 HOUSING, with diaphragm spring, 1 Uprated fitment - fast road or<br />

orange coded<br />

competition use.<br />

C-AEG482 HOUSING, with diaphragm spring, 1 Uprated fitment - competition use.<br />

grey coded<br />

42 AAU7154 PLATE, release 1 Included in housing.<br />

43 22A921 CIRCLIP, plate 1 Included in housing.<br />

44 2A3657 SCREW, housing to pressure plate 3<br />

45 LWZ406 WASHER, shakeproof 3<br />

46 GRB201 BEARING, clutch release 1<br />

47 18G8086 LOCK TAB KIT, clutch 1 Includes lock tabs for strap and<br />

flywheel securing screws.<br />

Verto Clutch, 1982 On<br />

48 GCP271AF PLATE, driven 1 1982-90; 184mm diameter clutch.<br />

GCP90832AF PLATE, driven 1 1990 on; 190mm diameter clutch.<br />

49 GCC679 DIAPHRAGM AND PRESSURE PLATE ASS’Y 1 1982-90; 184mm diameter clutch.<br />

C1644AF DIAPHRAGM AND PRESSURE PLATE ASS’Y 1 1990 on; 190mm diameter clutch.<br />

50 BAU2319 BOLT, diaphragm and pressure plate 3<br />

securing<br />

51 BAU2320 WASHER, shakeproof 3<br />

52 WAM1188 RELUCTOR RING , engine management 1 Injection models only; included in<br />

flywheel and clutch assembly.<br />

53 SJ104121M SCREW, reluctor ring to flywheel 2<br />

54 AHU1564 SLEEVE, clutch release 1<br />

55 GRB239 BEARING ASSEMBLY, clutch release 1<br />

56 AAU2866 O RING, clutch release bearing 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

3


<strong>Manual</strong> <strong>Gearbox</strong> - Flywheel Housing and Clutch Cover<br />

© Copyright Somerford Mini Limited<br />

4<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - Flywheel Housing and Clutch Cover<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Flywheel Housing<br />

1 22G999 FLYWHEEL HOUSING , no breather hole 1 1959-68, 3 synchro gearbox, all models .<br />

DAM3165 FLYWHEEL HOUSING , no breather hole 1 1968-69, 4 synchro gearbox, all models.<br />

1969-79, 4 synchro gearbox, not<br />

1275cc .<br />

DAM6259 FLYWHEEL HOUSING , no breather hole 1 1979-92, 4 synchro gearbox, not<br />

1275cc .<br />

2 DAM3161 FLYWHEEL HOUSING , with breather hole 1 1969-79, 4 synchro gearbox, 1275cc.<br />

DAM6257 FLYWHEEL HOUSING , with breather hole 1 1979-91, 4 synchro gearbox, 1275cc<br />

carburetter.<br />

TRD10015 FLYWHEEL HOUSING , with breather hole 1 1991 on, 4 synchro gearbox, 1275<br />

and crank sensor hole<br />

injection and carburetter.<br />

3 88G302 BEARING, idler gear (1.004" ext. dia.) 1 1959-68, 3 synchro gearbox.<br />

13H7848 BEARING, idler gear (1 1/16" ext. dia., 1 1968-79, 4 synchro gearbox.<br />

3/4" int. dia.)<br />

AHU1707 BEARING, idler gear (1 3/8" ext. dia., 1 1979 on, 4 synchro gearbox.<br />

7/8" int. dia.)<br />

DAM3745 BEARING, idler gear, special, with sleeve 1 For use, see note below.<br />

(1 3/8" ext. dia., 3/4" int. dia.)<br />

4 LCG10001 BLANKING PLATE, crank sensor hole 1 1992-94, 1275 carburetter.<br />

5 FS105101 SCREW, blanking plate to 2 1992-94, 1275 carburetter.<br />

flywheel housing<br />

Interchangeability of flywheel housings:<br />

For 1959-68 models (3 synchro gearbox), none of the later 4 synchro flywheel housings can be used in<br />

place of the original.<br />

For 1968-79 models (not 1275), flywheel housing DAM6259 may be used, so long as the special idler<br />

bearing with sleeve DAM3745 is also fitted.<br />

For 1968-69 models (1275 only), flywheel housing DAM6259 may be used, so long as the special idler<br />

bearing with sleeve DAM3745 is also fitted.<br />

For 1969-79 models (1275 only), flywheel housing DAM6257 may be used, so long as the special idler<br />

bearing with sleeve DAM3745 is also fitted. Alternatively, flywheel housing TRD10015 may be used, so<br />

long as LCG10001 crank sensor hole blanking plate and two off FS105101 screws are also fitted, along<br />

with the special idler bearing and sleeve DAM3745.<br />

For 1979-91 models (1275 carburetter), flywheel housing TRD10015 may be used, so long as LCG10001<br />

crank sensor hole blanking plate and two off FS105101 screws are also fitted.<br />

These notes show how to use later flywheel housings on earlier 4 synchro power units - they do<br />

rely on the original idler gear being retained. If you’re not sure what’s original on the car for<br />

its year, to be sure you may have to dust off a vernier caliper and deduce (i) the external<br />

diameter of the idler gear bearing required (measure the bearing location in the flywheel housing)<br />

and (ii) the internal diameter required (measure the idler gear shaft diameter). You should then<br />

be able to find a bearing size suiting your purposes from the Somerford Mini range above.<br />

6 13H2934 OIL SEAL, clutch (primary gear oil seal)1 All carburetter models.<br />

LUF10005 OIL SEAL, clutch (primary gear oil seal) 1 All injection models .<br />

7 DAM2821 SHIELD, oil seal protection 1 1982 on; all Verto clutch models.<br />

8 AAU8424 BEARING, first motion shaft 1<br />

9 2A3643 CIRCLIP, bearing to flywheel housing 1<br />

10 CCN110 CIRCLIP, bearing to first motion shaft 1<br />

11 GUG705563GM GASKET, flywheel housing to cylinder 1<br />

block/gearbox<br />

12 18G8086 LOCK TAB KIT, clutch 1 Includes lock tabs for strap and<br />

flywheel securing screws, plus lock<br />

tabs for flywheel housing screws.<br />

13 22A1762 LOCK TAB, flywheel housing attachment 1 Included in clutch lock tab kit.<br />

14 22A1761 LOCK TAB, flywheel housing attachment 1 Included in clutch lock tab kit.<br />

15 2A3521 LOCK TAB, flywheel housing attachment 1 Included in clutch lock tab kit.<br />

16 22A1241 LOCK TAB, flywheel housing attachment 1 1968 on (4 synchro gearbox);<br />

included in clutch lock tab kit.<br />

17 BH605141 BOLT, long, flywheel housing attachment 3<br />

DAM7758 BOLT, flanged, long, flywheel housing 3 Alternative.<br />

attachment<br />

18 LWZ305 WASHER, locking 3<br />

19 SH605081 SCREW, shor t, flywheel housing 3<br />

attachment<br />

DAM7753 BOLT, flanged, shor t, flywheel housing 3 Alternative.<br />

attachment<br />

20 FNZ505 NUT, flywheel housing attachment 9<br />

21 LWZ305 WASHER, locking 4<br />

22 22A1299 PLATE, dowel retaining 1 1968 on (4 synchro gearbox).<br />

For certain markets or on certain models during the 1960s, the starter solenoid was fixed to a bracket<br />

attached to the flywheel housing:<br />

23 12A369 BRACKET, starter solenoid to flywheel 1 Not Cooper S models.<br />

housing<br />

12G326 BRACKET, starter solenoid to flywheel 1 Cooper S models.<br />

housing<br />

24 SH505051 SCREW, bracket to flywheel housing 2<br />

25 LWZ305 WASHER, locking 2<br />

Clutch Cover and Clutch Release Mechanism<br />

1959-82, Coil Spring or Diaphragm Clutch<br />

26 88G300 COVER, clutch,with timing hole 1<br />

27 2A3635 COVER, timing hole 1<br />

28 SH604041 SCREW, timing hole cover to clutch cover 2<br />

29 LWZ304 WASHER, locking 2<br />

30 53K146 SCREW, clutch cover to flywheel housing 8<br />

DAM7755 BOLT, flanged head, clutch cover to 8<br />

flywheel housing<br />

31 LWZ305 WASHER, locking 8<br />

32 22A180 PLUNGER, clutch release 1 Release bearing secures by press-fit.<br />

33 DAM1955 PLUNGER, clutch release 1 Alternative; release bearing secures<br />

with clip.<br />

34 DAM2413 CLIP, release bearing to plunger 1 Use with DAM1955 plunger.<br />

35 22A427 NUT, clutch release stop 1<br />

36 NT610041 NUT, locking clutch release stop nut 1<br />

The very ear liest cars from 1959-60 were originally fitted with a plunger with an integral (nonadjustable)<br />

stop. This may be replaced by either of the plungers listed above, to gether with a 22A427<br />

stop nut and NT610041 lock nut.<br />

37 22A2204 LEVER, clutch release 1<br />

38 CLZ628 CLEVIS PIN, lever pivot in clutch cover 1<br />

39 PWZ106 WASHER, plain 1<br />

40 ZPS307 SPLIT PIN 1<br />

41 SH604091 SCREW, lever adjusting 1<br />

42 FNZ604 NUT, locking adjusting screw 1<br />

43 CLZ518 CLEVIS PIN, lever to slave cylinder 1<br />

push rod<br />

44 PWZ105 WASHER, plain 1<br />

45 ZPS306 SPLIT PIN 1<br />

46 1G5999 SPRING, clutch release lever 1<br />

47 2A3601 ANCHOR, spring, clutch release lever end 1<br />

48 2A3600 ANCHOR, spring, slave cylinder end 1<br />

1982 On, Verto Clutch<br />

49 AHU1068 COVER, clutch,with timing hole 1 1982-85; with inertia star ter.<br />

AHU1106 COVER, clutch,without timing hole 1 1985 on; with pre-engaged starter.<br />

50 2A3635 COVER, timing hole 1 1982-85.<br />

51 SH604041 SCREW, timing hole cover to clutch cover 2 1982-85.<br />

52 LWZ304 WASHER, locking 2 1982-85.<br />

53 53K146 SCREW, clutch cover to flywheel housing 7<br />

DAM7755 BOLT, flanged head, clutch cover to 7<br />

flywheel housing<br />

54 LWZ305 WASHER, locking 7<br />

The eighth screw used to secure a Verto clutch cover is the long screw securing the slave cylinder bracket<br />

(please see Clutch Pedal and Hydraulics section).<br />

55 DAM5353 PLUNGER, clutch release 1<br />

56 AAU2866 O RING, release bearing 1<br />

57 22A427 NUT, clutch release stop 1<br />

58 NT610041 NUT, locking clutch release stop nut 1<br />

59 DAM5355 LEVER, clutch release 1<br />

60 CLZ628 CLEVIS PIN, lever pivot in clutch cover 1<br />

61 PWZ106 WASHER, plain 1<br />

62 ZPS307 SPLIT PIN 1<br />

63 SH604091 SCREW, lever adjusting 1<br />

64 FNZ604 NUT, locking adjusting screw 1<br />

65 CLZ518 CLEVIS PIN, lever to slave cylinder 1<br />

push rod<br />

66 PWZ105 WASHER, plain 1<br />

67 ZPS306 SPLIT PIN 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

5


<strong>Manual</strong> <strong>Gearbox</strong> - Clutch Pedal and Hydraulics<br />

© Copyright Somerford Mini Limited<br />

6<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - Clutch Pedal and Hydraulics<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Clutch Pedal and Pedal Box<br />

1 2A5866 CLUTCH PEDAL ASSEMBLY 1 1959-75.<br />

2 NAM3116 CLUTCH PEDAL ASSEMBLY 1 1976 on, RHD.<br />

NAM3115 CLUTCH PEDAL ASSEMBLY 1 1976 on; LHD.<br />

3 2A3034 BUSH, clutch pedal 1 Included in clutch pedal assembly.<br />

4 GPR104 PAD, clutch pedal 1 1959-75.<br />

5 GPR107 PAD, clutch pedal 1 1976-90.<br />

SZU10001 PAD, clutch pedal 1 1990 on.<br />

6 2A5880 SHAFT, clutch and brak e pedals 1 RHD, all models; 1959-88, LHD<br />

without direct acting brak e servo.<br />

NAM8524 SHAFT, clutch and brak e pedals 1 1988 on, LHD with direct acting<br />

brak e servo.<br />

7 LNZ205 NUT, nyloc 1<br />

8 2A5652 SPRING , clutch pedal return 1 1959-88, without direct acting brake<br />

servo.<br />

9 NAM8544 SPRING, clutch pedal return 1 1988 on, RHD with direct acting<br />

brak e servo.<br />

NAM8547 SPRING , clutch pedal return 1 1988 on, LHD with direct acting<br />

brake servo.<br />

10 2A5859 PEDAL BOX ASSEMBLY 1 1959-71, single line brakes.<br />

21A2467 PEDAL BOX ASSEMBLY 1 1971-75, single line brak es.<br />

21A2056 PEDAL BOX ASSEMBLY 1 1969-71, dual line brak es.<br />

21A2345 PEDAL BOX ASSEMBLY 1 1971-75, dual line brak es.<br />

NAM8670 PEDAL BOX ASSEMBLY 1 1976-88, dual line brakes without<br />

direct acting servo.<br />

SKU10043 PEDAL BOX ASSEMBLY 1 1988-96, RHD with direct acting<br />

servo.<br />

SKU101220 PEDAL BOX ASSEMBLY 1 1997 on, RHD, all models.<br />

SKU10040 PEDAL BOX ASSEMBLY 1 1988-94, LHD carburetter models.<br />

SKU10042 PEDAL BOX ASSEMBLY 1 1991-96, LHD injection models .<br />

SKU101210 PEDAL BOX ASSEMBLY 1 1997 on, LHD, all models.<br />

11 21A2348 CLAMP, pedal box 1 1971-75, dual line brakes.<br />

12 21A1657 PLATE, locating 1 1959-75, models fitted with<br />

steering lock.<br />

13 SH605051 SCREW, pedal box to body 2<br />

14 LWZ205 WASHER, locking 2<br />

15 CLZ512 CLEVIS PIN, pedal to master cylinder 1<br />

push rod<br />

16 GHF502 SPLIT PIN 1<br />

17 RCLIP01 ‘R’ CLIP 1 Easier to fit than a split pin!<br />

Fitting the split pins to the top of the clutch and brake pedals to connect them to their<br />

respective master cylinder push rods is one of those classically frustrating jobs on a Mini - you<br />

know the score: a half minute job that takes half an hour because there’s so little space in<br />

which to manoeuvre! You can see where the split pin goes until you get your hand and a pair<br />

of pliers in there, after which you can’t see what you’re doing and there’s no space to turn over<br />

the ends of the split pin anyway. An ‘R’ clip however can be inserted in place of the split pin, on<br />

the end of a pair of thin-nosed (‘snipe-nosed’) pliers, and simply clips in place without a<br />

struggle. This is positively the easiest, most gratifying modification you’ll ever make to your Mini!<br />

18 31G279 GASKET, master cylinder to pedal box 1<br />

19 FNZ505 NUT, master cylinder to pedal box 2<br />

20 LWZ205 WASHER, locking 2<br />

Clutch Master Cylinder<br />

The vast majority of Minis used the same metal tank clutch master cylinder (which could have either of<br />

two internal designs - watch out and carr y on reading below if you need a repair kit). This was<br />

superseded in 1998 approximately by a plastic tank version, which saw use until the end of Mini<br />

production in 2000. While metal and plastic tank master cylinders are theoretically interchangeable,<br />

most owners seem to stick with the style appropriate for their car.<br />

Around 1977 the manufacturer of the metal tank master cylinder changed the design of the piston<br />

inside to incorporate two ring seals instead of the previous one ring seal and one cap (or blind) seal.<br />

Most - but not all - metal tank master cylinders available since that time are of the later design, which<br />

may be identified by a circle or groove cut into the body of the cylinder. The very late-model plastic<br />

tank master cylinder also uses the ‘two ring seal’ piston design. Be sure to identify which cylinder you<br />

have before ordering internal parts for it from Somerford Mini!<br />

21 AAU4969 MASTER CYLINDER ASS’Y, metal tank 1 1959-98 approx.<br />

GMC901078 MASTER CYLINDER ASS’Y, plastic tank 1 1998 approx. on.<br />

22 17H3723 CAP, reservoir, metal, with seal 1 1959-63 approx.<br />

23 501524 SEAL, metal cap 1 Included with cap.<br />

24 513123A CAP, reservoir, plastic 1 1963 approx. on.<br />

25 GRK3007 REPAIR KIT, early metal tank master 1 For cylinders with ring seal and<br />

end cylinder cap (see note).<br />

26 GRK3004 REPAIR KIT, later metal or plastic tank1 For cylinders with two ring seals<br />

(see master cylinders note).<br />

27 27H7751 SPRING, return 1<br />

28 17H7560 CIRCLIP 1<br />

29 17H7557 PUSH ROD 1<br />

30 17H7555 ADAPTOR, cylinder to clutch pipe 1 Very early original cylinders only.<br />

31 17H7556 SEAL, adaptor 1 Very early original cylinders only.<br />

Clutch Pipe and Hose<br />

Clutch Pipe<br />

Pre-assembled clutch pipes can be supplied in Cunifer, a superior material which bends to shape easily,<br />

doen’t work harden and subsequently split and does not corrode. If desired, however, we will supply<br />

pipes in original Bundy material or copper - for either of these, please contact Somerford Mini.<br />

32 21A2234 CLUTCH PIPE ASSEMBLY, 28cm long 1 RHD models.<br />

21A70 CLUTCH PIPE ASSEMBLY, 86cm long 1 LHD models.<br />

If you have flaring and pipe bending tools to hand, individual components to make up your own clutch<br />

pipe are also available:<br />

33 CNF316 CLUTCH PIPE, superior cunifer, A/R Requires cutting and flaring to fit.<br />

per metre<br />

HCP316 CLUTCH PIPE, copper, per metre A/R Requires cutting and flaring to fit.<br />

34 TM606031 TUBE NUT, brake pipe union, 3/8 UNF, A/R<br />

male<br />

35 21A64 CLIP, pipes to dash 2 LHD with single line brakes.<br />

36 FNZ103 NUT, clip to dash 2 LHD with single line brakes.<br />

37 WL700101 WASHER, locking 2 LHD with single line brakes.<br />

38 6K751 SLEEVE, rubber, clutch pipe 2 LHD with single line brakes.<br />

39 21A2192 CLIP, pipes to dash 2 LHD with front/rear split brakes.<br />

40 FNZ103 NUT, clip to dash 2 LHD with front/rear split brakes.<br />

41 WL700101 WASHER, locking 2 LHD with front/rear split brakes.<br />

42 CAC402 CLIP, double, pipes to dash 2 LHD with diagonally split brakes.<br />

Clutch Hose<br />

43 GVP1020 CLUTCH HOSE, rubber 1 1959-82; standard fitment. Coil<br />

spring and diaphragm clutches.<br />

44 BHS001 CLUTCH HOSE, stainless braided 1 1959-82; uprated fitment. Coil<br />

spring and diaphragm clutches.<br />

45 GVP1009 CLUTCH HOSE AND BANJO UNION, 1 1982 on; standard fitment. Verto<br />

rubber<br />

clutch.<br />

46 BHS002 CLUTCH HOSE AND BANJO UNION, 1 1982 on; uprated fitment. Verto<br />

stainless braided<br />

clutch.<br />

47 2K8686 NUT, clutch hose to dash crossmember 1<br />

48 LWZ510 WASHER, shakeproof 1<br />

49 233220A WASHER, sealing, hose to slave cylinder 1 1959-82.<br />

50 C5192A BOLT, banjo, hose to slave cylinder 1 1982 on.<br />

51 3H550 WASHER, sealing, banjo bolt to banjo 1 1982 on.<br />

52 233220A WASHER, sealing, banjo to slave cylinder1 1982 on.<br />

Slave Cylinder<br />

Coil Spring or Diaphragm Clutch, 1959-82<br />

53 GSY110 SLAVE CYLINDER ASSEMBLY, clutch 1<br />

54 GRK4008 REPAIR KIT, slave cylinder 1<br />

55 3H2428 BLEED NIPPLE 1 Included in slave cylinder assembly.<br />

56 13H396 PUSH ROD, clutch operating 1<br />

57 SH506101 SCREW, coarse thread, cylinder to 2<br />

flywheel housing<br />

58 LWZ206 WASHER, locking 2<br />

Verto Clutch, 1982 On<br />

59 GSY118 SLAVE CYLINDER ASSEMBLY, clutch 1<br />

60 GRK4001 REPAIR KIT, slave cylinder 1<br />

61 3H2428 BLEED NIPPLE 1 Included in slave cylinder assembly.<br />

62 13H396 PUSH ROD, clutch operating 1<br />

63 DAM5992 BRACKET, cylinder to flywheel housing 1<br />

64 SH606081 SCREW, cylinder to bracket 2<br />

65 LWZ206 WASHER, locking 2<br />

66 SH506081 SCREW, coarse thread, bracket to 2<br />

flywheel housing<br />

67 LWZ206 WASHER, locking 2<br />

68 ADU7036 DISTANCE PIECE 1<br />

69 SH604141 SCREW, bracket to distance piece and 1<br />

clutch cover<br />

70 LWZ204 WASHER, locking 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

7


<strong>Manual</strong> <strong>Gearbox</strong> - Primary, Idler and 1st Motion Shaft Drive Gears<br />

© Copyright Somerford Mini Limited<br />

8<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - Primary, Idler and 1st Motion Shaft Drive Gears<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Primary, Idler and 1st Motion Shaft Drive Gears<br />

Several different combinations of primary gear and bushes were used on the ear liest Mini power units<br />

built between 1959 and 1963, following the abject failure of the first, the so-called ‘D.U.’ bush and oil<br />

seal design (which allowed engine oil seepage onto the clutch all too frequently). As an interim<br />

measure, a revised oil-fed bush system was fitted - in most cases when the car came in for the<br />

inevitable clutch replacement - and after a couple of false starts the ‘Deva’ dry-lubricated bush became<br />

the standard fitment. Each system necessitated a different engine crankshaft and flywheel, as well as<br />

the primary gear and bushes. Extra care must be taken to select matching components for these ear ly<br />

designs.<br />

From 1963 onwards, crankshaft, flywheel, primary gear and bush combinations settled down into tw o<br />

designs, depending on the crankshaft tail dimensions: one combination for 848, 998 and 1098 engines<br />

and the other for 1071, 1275 and 970 engines. This continued right the way through to 1979 when ‘A<br />

Plus’ gears were introduced, which saw production out through to 2000.<br />

Primary gears are supplied with their bushes fitted, as ready-to-use assemblies, from Somerford<br />

Mini. However, if you intend to fit replacement bushes in a primary gear, the bushes must be<br />

machined after fitment to ensure alignment with each other.<br />

By contrast, the idler and 1st motion shaft drive gears saw far fewer changes, being limited to 3<br />

synchro gearbox (1959-68), pre-A Plus 4 synchro gearbox (1968-79) and A Plus (1979 on). Of these,<br />

pre-A Plus 4 synchro gears may be used on 3 synchro gearboxes if certain other components are fitted<br />

at the same time. However, pre-A Plus and A Plus gears cannot be mixed and matched together.<br />

Bearings (and their retaining circlips) for the idler and drive gears may be found in the ‘Flywheel<br />

Housing and Clutch Cover’ and ‘<strong>Manual</strong> <strong>Gearbox</strong> - External’ sections of this catalogue. Primary, idler and<br />

drive gears for automatic Minis may be found in the ‘Automatic Transmission - Torque Converter and<br />

Housing’ section.<br />

Primary Gears<br />

Confusion often reigns over the convention for naming primary gear bushes. Which should be called the<br />

front bush and which should be the rear The answer is the bush closer to the front of the engine<br />

(i.e. the water pump end) is the front bush and the bush on the clutch end (the ‘top hat’ bush on<br />

post-1962 cars) is the rear bush. Hope that sorts it out.<br />

1959-62, Oil-fed Bush 848 Engines<br />

1 22A79 PRIMARY GEAR, with bushes, 24 teeth 1<br />

2 22A81 BUSH, primary gear,front 1<br />

3 22A82 BUSH, primary gear,rear 1<br />

1961-62, Oil-fed Bush 997 Engines<br />

4 12A380 PRIMARY GEAR, with bushes, 24 teeth 1<br />

5 12A386 BUSH, primary gear,front 1<br />

6 12A385 BUSH, primary gear,rear 1<br />

1962-63, Deva Bush 848 Engines, 1 3/8" dia. Flywheel Machining<br />

7 22A520 PRIMARY GEAR, with bushes, 24 teeth 1<br />

8 22A447 BUSH, primary gear,front 1<br />

9 22A448 BUSH, primary gear,rear 1<br />

1962-63, Deva Bush 997 Engines, 1 3/8" dia. Flywheel Machining<br />

10 22G106 PRIMARY GEAR, with bushes, 24 teeth 1<br />

11 22G108 BUSH, primary gear,front 1<br />

12 22G109 BUSH, primary gear,rear 1<br />

1963, Deva Bush 997/998 Engines, 1 1/2" dia. Flywheel Machining<br />

13 22A551 PRIMARY GEAR, with bushes, 24 teeth 1<br />

14 22A553 BUSH, primary gear,front 1<br />

15 22G109 BUSH, primary gear,rear 1<br />

1963-92, Deva Bush 848/998/1098 Engines, 1 1/2" dia. Flywheel Machining<br />

16 22A1493 PRIMARY GEAR, with bushes, 24 teeth 1 1963-79.<br />

DAM8888 PRIMARY GEAR, with bushes, 29 teeth 1 1979-92; A Plus.<br />

17 DAM2821 DUST SHIELD 1 1979-92; A Plus.<br />

18 DAM8887 BUSH, primary gear,front 1<br />

19 22G109 BUSH, primary gear,rear 1<br />

1963 On, Deva Bush 970/1071/1275 Engines, 1 1/2" dia. Flywheel Machining<br />

20 22G1053 PRIMARY GEAR, with bushes, 24 teeth 1 1963-79.<br />

DAM8890 PRIMARY GEAR, with bushes, 29 teeth 1 1979 on; A Plus. Not France 1990-96.<br />

DAM9373 PRIMARY GEAR, with bushes, 30 teeth 1 A Plus. France 1990-96.<br />

21 DAM2821 DUST SHIELD 1 1979 on; A Plus.<br />

22 DAM8889 BUSH, primary gear,front 1<br />

23 22G109 BUSH, primary gear, rear 1<br />

Primary Gear Front Thrust Washers<br />

848, 997, 998 and 1098 Engines, Except 848 Engines 1962-63<br />

24 22A321 WASHER, thrust, primary gear, front 1 0.110-0.112" (2.79-2.84mm).<br />

22A322 WASHER, thrust, primary gear, front 1 0.112-0.114" (2.84-2.89mm).<br />

22A323 WASHER, thrust, primary gear, front 1 0.114-0.116" (2.89-2.94mm).<br />

22A324 WASHER, thrust, primary gear, front 1 0.116-0.118" (2.94-2.99mm).<br />

22A450 WASHER, thrust, primary gear, front 1 0.118-0.120" (2.99-3.04mm).<br />

848 Engines 1962-63<br />

25 22A295 WASHER, thrust, primary gear, front 1 0.123-0.125" (3.12-3.17mm).<br />

22A83 WASHER, thrust, primary gear, front 1 0.125-0.127" (3.17-3.22mm).<br />

22A238 WASHER, thrust, primary gear, front 1 0.127-0.129" (3.22-3.28mm).<br />

22A239 WASHER, thrust, primary gear, front 1 0.129-0.131" (3.28-3.32mm).<br />

970, 1071 and 1275 Engines<br />

26 DAM6490 WASHER, thrust, primary gear, front 1 0.112-0.114" (2.84-2.89mm).<br />

DAM6486 WASHER, thrust, primary gear, front 1 0.114-0.116" (2.89-2.94mm).<br />

DAM6487 WASHER, thrust, primary gear, front 1 0.116-0.118" (2.94-2.99mm).<br />

DAM6488 WASHER, thrust, primary gear, front 1 0.118-0.120" (2.99-3.04mm).<br />

DAM6489 WASHER, thrust, primary gear, front 1 0.120-0.122" (3.04-3.09mm).<br />

Primary Gear Rear Thrust Washers<br />

1959-62, Oil-fed Bush 848 Engines<br />

27 2A3597 WASHER, thrust, primary gear, rear 1<br />

1961-62, Oil-fed Bush 997 Engines<br />

28 12A382 WASHER, thrust, primary gear, rear 1<br />

29 12A383 RING, backing 1<br />

1962-63, Deva Bush 848 Engines With 1 3/8" dia. Flywheel Machining<br />

30 2A3597 WASHER, thrust, primary gear, rear 1<br />

31 22A449 RING, backing 1<br />

1962 On,Deva Bush 970, 997, 998, 1098, 1070 and 1275 Engines<br />

With 1 3/8" or 1 1/2" dia. Flywheel Machining<br />

1963 On,Deva Bush 848 Engines With 1 1/2” dia. Flywheel Machining<br />

32 22A319 WASHER, thrust, primary gear, rear 1<br />

33 88G549 RING, backing 1<br />

Idler Gears<br />

34 22A304 IDLER GEAR, 31 teeth, 3/4" shaft dia. 1 1959-68; 3 synchro.<br />

22G943 IDLER GEAR, 31 teeth, 3/4" shaft dia. 1 1968-79; 4 synchro.<br />

TUB101310 IDLER GEAR, 37 teeth, 7/8" shaft dia. 1 1979 on; 4 synchro, A Plus.<br />

The 3 synchro 22A304 idler gear may be replaced by the equivalent gear from the 4 synchro gearbox,<br />

22G943, so long as the original circlip retaining the idler gear bearing in the gearbox case is replaced<br />

with a 22G1141 circlip.<br />

35 22A1545 WASHER, thrust, 0.130-0.131" (3.30-3.32mm) 2 1959-79; 3 synchro and 4 synchro.<br />

22A1546 WASHER, thrust, 0.132-0.133" (3.35-3.37mm) 2 1959-79; 3 synchro and 4 synchro.<br />

22A1547 WASHER, thrust, 0.134-0.135" (3.40-3.42mm) 2 1959-79; 3 synchro and 4 synchro.<br />

22A1548 WASHER, thrust, 0.136-0.137" (3.45-3.47mm) 2 1959-79; 3 synchro and 4 synchro.<br />

22A1549 WASHER, thrust, 0.138-0.139" (3.50-3.53mm) 2 1959-79; 3 synchro and 4 synchro.<br />

DAM5914 WASHER, thrust, 0.130-0.131" (3.30-3.32mm) 2 1979 on; 4 synchro, A Plus.<br />

DAM4822 WASHER, thrust, 0.132-0.133" (3.35-3.37mm) 2 1979 on; 4 synchro, A Plus.<br />

DAM4823 WASHER, thrust, 0.134-0.135" (3.40-3.42mm) 2 1979 on; 4 synchro, A Plus.<br />

DAM4824 WASHER, thrust, 0.136-0.137" (3.45-3.47mm) 2 1979 on; 4 synchro, A Plus.<br />

DAM4825 WASHER, thrust, 0.138-0.139" (3.50-3.53mm) 2 1979 on; 4 synchro, A Plus.<br />

1st Motion Shaft Drive Gears<br />

36 2A3545 DRIVE GEAR, 1st motion shaft, 24 teeth 1 1959-68; 3 synchro.<br />

22G849 DRIVE GEAR, 1st motion shaft, 24 teeth 1 1968-79; 4 synchro.<br />

DAM2925 DRIVE GEAR, 1st motion shaft, 29 teeth 1 1979 on; A Plus. Not 1275 (France),<br />

1990-96.<br />

DAM6337 DRIVE GEAR, 1st motion shaft, 28 teeth 1 A Plus. 1275 (France), 1990-96.<br />

The 3 synchro 2A3548 drive gear may be replaced by the 22G849 gear from the 4 synchro gearbox, so<br />

long as distance piece C-STR239 is also used.<br />

37 2A3548 NUT, drive gear to 1st motion shaft 1<br />

38 DAM4000 LOCK TAB 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

9


<strong>Manual</strong> <strong>Gearbox</strong> - External <strong>Components</strong><br />

© Copyright Somerford Mini Limited<br />

10<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - External <strong>Components</strong><br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Rebuilt or Repaired <strong>Gearbox</strong> Assemblies<br />

Somerford Mini Ltd. offers a gearbox rebuilding and repair service through its workshop facility. We can<br />

carry out repairs or rebuilds on late-model gearboxes, but can only realistically offer a repair service for<br />

the earlier designs because of, frankly, poor overall par ts availability in the marketplace. Please<br />

contact us to discuss your Mini gearbox requirements - it would be helpful if you could supply us not<br />

only the details of what’s gone wrong with your gearbox, but the age (if known) and type (3 or 4<br />

synchro, A or A Plus, gearchange type and driveshaft type). The more you can provide us with, the<br />

better we can ascertain how we might possibly help you.<br />

It has to be said that at time of writing, spares availability for 1959-68 3 synchromesh gearboxes is not<br />

very good at all and unfortunately because of the high cost involved in reintroducing some components,<br />

the situation is unlikely to get much better in the forseeable future. Rest assured, however, that we will<br />

always do whatever we can to help you. The later 4 synchromesh gearboxes fare much better, especially<br />

of course the rod change variety which were in production between 1973 and 2000. Having said that,<br />

there are some surprising gaps in parts availability, even for 1980s rod change gearboxes.<br />

The general rule is that the older the gearbox type, the more components are not available new and<br />

the less likely a totally comprehensive rebuild will be possible.<br />

5 Speed <strong>Gearbox</strong> Assemblies<br />

5 speed rod-change gearboxes have generated much interest for some years now, with several<br />

organisations producing their own designs (Jack Knight Developments, KAD and Mini Spares, for example).<br />

Please contact us to establish which are currently available.<br />

Differential Cover Attachment<br />

1 2A3505B GASKET, cover to gearbox case, upper 1<br />

2 2A3506B GASKET, cover to gearbox case, lower 1 1959-73 Saloon and Estate; 1960-75<br />

Van and Pick Up. Direct or remote<br />

gearchange.<br />

3 22G1836B GASKET, cover to gearbox case, lower 1 1973 on Saloon; 1973-82 Estate;<br />

1976-84 Van and Pick Up. Rod<br />

gearchange.<br />

4 BHYL001 HYLOMAR SEALANT, 100g tube A/R Use with gaskets.<br />

5 22A153 DOWEL,cover to gearbox case 2<br />

6 22G1834 STUD, cover to gearbox case, long 4/2 Qty. reduces for rod gearchange.<br />

7 FNZ506 NUT 4<br />

8 CHS522 STUD, cover to gearbox case, shor t 3<br />

9 DAM7760 BOLT, flanged, cover to gearbox case , shor t 3 Alternative to stud from 1985 on.<br />

10 FNZ505 NUT 3<br />

11 LWZ305 WASHER, locking 3<br />

12 22A74 LOCK TAB, cover to gearbox case, large 2 1959-62 direct gearchange.<br />

22A74 LOCK TAB, cover to gearbox case, large 1 Direct or remote gearchange.<br />

13 42H500 LOCK TAB, cover to gearbox case, large 1 Rod gearchange .<br />

14 22A251 LOCK TAB, cover to gearbox case, small 1 1962 on.<br />

15 22A252 LOCK TAB, cover to gearbox case, small 1 1962-71 appro x.<br />

The 22A251 and 22A252 small lock tabs replaced one of the 22A74 large lock tabs in 1962. 22A252<br />

was quietly dropped in the early 1970s and is no longer considered necessary to fit.<br />

Flywheel Housing Attachment<br />

16 GUG705563GM GASKET, housing to cylinder block/gearbox 1<br />

17 22A97 DOWEL, housing to gear case 2<br />

18 22A152 STUD, housing to gear case, long 6<br />

19 DAM7759 BOLT, flanged, housing to gear case, long 6 Alternative to stud, 1985 on.<br />

20 53K547 STUD, housing to gear case, short 3<br />

21 DAM7756 BOLT, flanged, housing to gear case, short 3 Alt. to stud, 1985 on, not 1275cc.<br />

DAM7756 BOLT, flanged, housing to gear case, short 1 Alt. to stud, 1985 on; 1275cc.<br />

DAM7757 BOLT, flanged, housing to gear case, short 2 Alt. to stud, 1985 on; 1275cc.<br />

For nuts, washers and lock tabs for the above studs, plus hardware used to attach the flywheel<br />

housing to the cylinder block, please see the ‘Flywheel Housing and Clutch Cover’ section.<br />

Speedometer Pinion Housing Attachment<br />

22 DAM5219 HOUSING, speedometer pinion 1<br />

23 GUG705569GM GASKET, housing to gearbox case 1<br />

24 22A13 DOWEL,housing to gearbox case 2<br />

25 SH505091 SCREW, coarse thread, housing to gearbox 5<br />

case<br />

26 LWZ305 WASHER, locking 5<br />

27 53K1474 STUD, housing to gearbox case 3<br />

28 DAM7761 BOLT, flanged, housing to gearbox case 3 Alternative to stud from 1985 on.<br />

29 53K551 STUD, engine mounting to housing 1 Not 850 models, 1959-68.<br />

53K545 STUD, engine mounting to housing 1 850 models , 1959-68.<br />

30 FNZ505 NUT 4<br />

31 LWZ305 WASHER, locking 4<br />

32 2A3626 END PLATE, housing 1<br />

33 GUG705564GM GASKET, end plate to housing 1<br />

34 SH504061 SCREW, coarse , end plate to housing 2<br />

35 LWZ304 WASHER, locking 2<br />

Cylinder Block Attachment<br />

36 GUG106SS GASKET SET, gearbox case to cylinder block 1<br />

37 AHU1959 SEAL, oil, front main bearing cap 1 ‘Half Moon’ seal.<br />

38 22H983 DOWEL,gearbox case to cylinder block 1<br />

39 FHS2410 STUD, gear case to thick flanged block 2 Not Cooper or Cooper S, 1961-67.<br />

FHS2409 STUD, gear case to thin flanged block 2 Cooper and Cooper S, 1961-67.<br />

40 FNZ504 NUT 2<br />

41 LWZ304 WASHER, locking 2<br />

42 SH604081 SCREW, gearbox case rear to cylinder block 5<br />

43 BH604121 BOLT,gearbox case front to cylinder block 5<br />

44 LWZ304 WASHER, locking 10<br />

45 BH604121 BOLT, dowel 1<br />

46 12A1150 COLLAR, dowel bolt 1<br />

47 PWZ104 WASHER, plain 1<br />

48 FNZ104 NUT 1<br />

<strong>Gearbox</strong> Case Fittings<br />

49 GEG804 GASKET SET, gearbox 1 Includes all gaskets, oil seals and sealing<br />

washers; direct and remote gearchange.<br />

GUG708002TS GASKET SET, gearbox 1 Includes all gaskets, oil seals and sealing<br />

washers; rod gearchange to 1996.<br />

GUG708014TS GASKET SET, gearbox 1 Includes all gaskets, oil seals and sealing<br />

washers; rod gearchange 1997 on.<br />

50 18G8085 LOCK TAB KIT, gearbox 1 Includes lock tabs for the differential<br />

cover and oil strainer, for direct,<br />

remote or rod change gearboxes.<br />

51 2A3502 BUSH, gearchange control shaft 2 1959-73 Saloon; 1960-73 Estate;<br />

1960-75 Van and Pick Up. Direct and<br />

remote gearchange .<br />

52 13H7286 BUSH, ‘Metalastic’, gearchange steady rod 1 1973 on Saloon; 1973-82 Estate;<br />

1976-84 Van and Pick Up. Rod change.<br />

53 AHU1672 OIL SEAL,selector shaft, in differential cover1 1973 on Saloon; 1973-82 Estate;<br />

1976-84 Van and Pick Up. Rod change.<br />

54 DAM7764 BUSH, selector shaft 1 Rod gearchange up to 1985 approx.<br />

Replace with SSK001 selector oil seal kit.<br />

55 DAM8706 BUSH, aluminium, selector shaft, improved 1 Rod gearchange 1985 approx. on.<br />

56 CDU1563 O RING, selector shaft 1 Rod gearchange 1985 approx. on.<br />

57 DAM3022 GAITER, selector shaft 1 1973 on Saloon; 1973-82 Estate;<br />

1976-84 Van and Pick Up. Rod change.<br />

Selector shaft oil seal failure was always a problem on rod gearchange Minis (as any late-model Mini<br />

owner with oil drips on their garage floor will know). The most common remedy effected by owners in<br />

the past was to put two oil seals one behind the other on the selector shaft (there’s just enough space<br />

to do so),the outer one of the two acting both as a secondary seal and also as a secondary shield<br />

behind the gaiter,protecting the inner seal from under-body muck and grit. Most importantly, the<br />

second seal helped to support the selector shaft and hold it in alignment in the gearbox casing.<br />

Factory engineers finally came up with a remedy in 1985,fitting a modified selector shaft bush with a<br />

new O ring to improve the selector shaft alignment. Somerford Mini of course supply all these<br />

parts separately, but we’ve also put them together as an easy-to-buy, easy-to-fit kit for the owner<br />

to modify a pre-1985 Mini or repair a later model.<br />

58 SSK001 SELECTOR OIL SEAL KIT 1 Includes oil seal, gaiter and improved<br />

bush and O ring.<br />

59 88G302 BEARING, idler gear (1.004" ext. dia.) 1 1959-68, 3 synchro gearbox.<br />

13H7848 BEARING, idler gear (1 1/16" ext. dia., 1 1968-79, 4 synchro gearbox.<br />

3/4" int. dia.)<br />

AHU1707 BEARING, idler gear (1 3/8" ext. dia., 1 1979 on, 4 synchro gearbox.<br />

7/8" int. dia.)<br />

DAM3745 BEARING, idler gear, special, with sleeve 1 For use, see note below.<br />

(1 3/8" ext. dia., 3/4" int. dia.)<br />

60 CCN216 CIRCLIP, bearing retaining 1 Use with 88G302 bearing and original<br />

3 synchro 22A304 idler gear.<br />

22G1141 CIRCLIP, bearing retaining 1 Use with 88G302 bearing and original<br />

3 synchro 22A304 idler gear or<br />

replacement 22G943 idler gear.<br />

51K3565 CIRCLIP, bearing retaining 1 Use with 13H7848 bearing.<br />

The DAM3745 bearing with sleeve was intended to allo w a post-1979 service gearbox to be fitted to a<br />

1973-79 car, retaining the original idler and first motion shaft drive gears in that car. Nowadays it<br />

makes a useful conversion par t for those wanting to mix and match their gearbox, idler and drive gears.<br />

61 2A3504 PIVOT PIN, reverse operating lever 1 Direct or remote gearchange.<br />

62 DAM7335 PLUG, drain, magnetic 1<br />

DP1 PLUG, drain, magnetic, extended 1 Use with centre oil pick up pipe.<br />

63 AED172 WASHER, sealing, drain plug 1<br />

64 22A335 STRAINER, oil 1<br />

65 22A341 O RING, pick up pipe 1<br />

66 22A342 BRACKET, strainer 1<br />

67 SH604031 SCREW, strainer to bracket 2<br />

68 22A388 LOCK TAB, strainer to bracket 1 Included in 18G8085 lock tab kit.<br />

69 SH604081 SCREW, bracket to gearbox case 2<br />

70 22A1365 LOCK TAB, bracket to gearbox case 1 Included in 18G8085 lock tab kit.<br />

71 22G1150 PIPE, oil pick up 1 Not 850 models.<br />

22A337 PIPE, oil pick up 1 850 models.<br />

72 C-AHT54 PIPE, oil pick up, centre 1 For fast road or competition use; we<br />

advise the use of DP1 extended drain<br />

plug with this pipe .<br />

73 2A3637 FLANGE, pick up pipe, outer 1<br />

74 22A542B GASKET, pick up pipe flanges 2<br />

75 BH604131 BOLT,pick up pipe flanges to gearbox case 2<br />

76 2K4874 LOCK TAB, flanges to gearbox case 1 Included in 18G8085 lock tab kit.<br />

77 2A3606 O RING, gearbox case to cylinder block 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

11


<strong>Manual</strong> <strong>Gearbox</strong> - 3 <strong>Synchro</strong> <strong>Internal</strong> <strong>Components</strong><br />

© Copyright Somerford Mini Limited<br />

12<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - 3 <strong>Synchro</strong> <strong>Internal</strong> <strong>Components</strong><br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

The 3 <strong>Synchro</strong> <strong>Gearbox</strong><br />

1959-68<br />

Fitted to all Minis between 1959 and 1968, the 3 synchro gearbox is so called because synchromesh is<br />

only available on 2nd, 3rd and 4th gears, 1st gear being of the ‘crash’ engagement type. Probably the<br />

most common fault on this gearbox is jumping out of first gear, followed closely by laygear bearing and<br />

layshaft failure. A proper first speed gear was inserted in the gearbox in 1968, at last receiving the<br />

great benefit of synchromesh engagement; this gearbox is known as the 4 synchro and its internal<br />

components are covered in the next section of the catalogue.<br />

If you’ve not been inside a 3 synchro Mini gearbox before or you can’t remember when you last did,<br />

please read these notes carefully - they could save you a lot of heartache. The gearbo x internal<br />

components were revised several times , with the changes being introduced at broadly the same times<br />

across all of the A series engined cars in the BMC range . Essentially, these revisions boil down to three<br />

types of gearbox (with a handful of components being awkward exceptions to the rule, of course... w e’ll<br />

explain those as best we can as we go along).<br />

The first 3 synchro gearbox fitted to the Mini is known as the ‘cone synchromesh’ gearbox, because of<br />

its use of cones to aid gearchanging rather than the more efficient baulk rings, which arrived in 1962.<br />

The next change occurred in 1963 or 1964 (depending on model) when the angles of the gear teeth<br />

were changed to quieten the baulk ring gearbox. The modified gears w ere known as B Type gears , the<br />

1962-63 gears retrospectively becoming known as A Type gears . So there you have it: 1959-62 Cone<br />

<strong>Synchro</strong>mesh gearbox, 1962-63/64 A Type Gears gearbo x and 1963/64-68 B Type Gears gearbox (plus, in<br />

1963-64, an A Type gearbox with B Type 1st/2nd synchroniser and reverse idler...!).<br />

<strong>Gearbox</strong> Identification<br />

Identifying your 3 synchro gearbox can be a ver y complicated process, bourne out by the unfor tunately<br />

necessarily complex guidelines below.<br />

Between the three 3 synchro gearbox types, many, many components are not interchangeable. This<br />

makes it especially important to identify your gearbox before ordering par ts, which can be difficult,<br />

particularly when trying to work out whether you have A or B Type gears . Originally, gearbox cases<br />

were stamped with a part number denoting the gear types within and the model application; however<br />

this has become quite irrelevant over the years as gearboxes have been rebuilt, very often with different<br />

components to overcome the lack of original parts availability.<br />

The only surefire way to identify the gearbox nowadays is to inspect the internals with a check list to<br />

hand, paying particular attention to:<br />

(i) the presence of synchro cones or baulk rings (denoting a Cone <strong>Synchro</strong> box in the first instance and<br />

an A Type or B Type box in the second);<br />

(ii) If baulk rings are present, establish whether the second and third gears run on bushes (the bush<br />

interlocking ring being visible between the two gears on the mainshaft gear cluster) or bearings . A Type<br />

gearboxes except in the 1963 Cooper 997 run on bushes; the second and third gears in A Type<br />

gearboxes in the 1963 Cooper 997 run on bearings, as is the case with the similarly shor t-lived Cooper<br />

and Cooper S gearbox with hybrid A/B Type gears and all gearboxes with B Type gears.<br />

(iii) Count the number of teeth on the laygear cluster. A combination of 13/19/24/28 teeth is the<br />

regular set-up for non Cooper models and 13/19/23/26 for Cooper. Other combinations were available<br />

only as Special Tuning options.<br />

(iv) Are the laygear bearing circlips on the outside or inside of the bearings Cone <strong>Synchro</strong> and A Type<br />

gears except 1963 Cooper 997 use outside laygear bearing circlips, whereas A Type gearbox in the 1963<br />

Cooper 997, the hybrid A/B Type gearbox and B Type gearboxes use inside circlips.<br />

The laygear should tell you which combination of gears you have... we say ‘should’ because the laygear<br />

part number was traditionally stamped on the component between the lar gest and second largest gears,<br />

but some reproduction gears (mostly in the case of 22G1100) don’t have this stamping. Identifying<br />

your laygear allows you to work out what other gears have been used in the gearbox, since they were<br />

designed to go together as matched gear sets and are usually not interchangeable. For this reason, all<br />

the other major components in this section use the application remarks shown alongside the laygears -<br />

even if it’s a bit long-winded sometimes, it positively matches the sets together.<br />

Be careful with gearboxes in 848 models and 997 Coopers using A Type gears , though - some have been<br />

converted from cone synchro to baulk ring A Type gears, retaining the original laygear ; some other<br />

components used in cone to baulk ring converted gearboxes are unique and most are not listed here<br />

(this catalogue section is complicated enough!). The 22G1100 laygear,incidentally, was for a short<br />

period at the start of its life known as and stamped as 22G232. Lastly, if you find 22G83 or 22G714<br />

on your laygear, you have an Austin/Morris 1100 or 1300 gearbox, not a Mini one.<br />

Parts Availability<br />

Unfortunately, parts availability ranges from almost hopeless (Cone <strong>Synchro</strong>mesh and A Type gears)<br />

through to pretty awful (B Type gears) and this situation is unlikely to improve greatly in the future.<br />

The B Type gears do, however, benefit marginally from the fact that the MG Midget continued to use<br />

versions of them until 1974, which slightly increases parts demand and availability. Many parts listed in<br />

this section are therefore shown only as a matter of reference.<br />

We will always do our utmost to help you seek out parts for your gearbox, but by rule of thumb the<br />

thing to remember here is don’t embark on a 3 synchro gearbox rebuild until (a) you’re absolutely sure<br />

you have the parts you need; and (b) you’ve weighed up seriously the benefits of sourcing another,better<br />

condition, gearbox instead. You have been war ned...<br />

Close Ratio and Straight Cut Gears<br />

Close ratio straight cut gear sets are available to build into gearboxes with B Type Gears components, as<br />

a special order. Please contact Somerford Mini for details. Similarly, please contact us if you have<br />

factory-optional (Special Tuning) helical close ratio, straight cut close ratio or straight cut<br />

standard ratio gears in your gearbox and you require replacement parts.<br />

Reverse Idler Gear<br />

1 22A377 REVERSE IDLER, with bush, 18 teeth 1 1959-64; 848 models, Cone <strong>Synchro</strong><br />

and A Type gears.<br />

1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

1962-63; 997 Cooper, A Type gears .<br />

1963; 997 Cooper, A Type gears .<br />

22G202 REVERSE IDLER, with bush, 18 teeth 1 1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears .<br />

1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

2 2A3475 BUSH, reverse idler 1<br />

3 DAM8038 SHAFT, reverse idler 1<br />

Laygear<br />

4 22A381 LAYGEAR, 13/19/24/28 teeth 1 1959-64; 848 models, Cone <strong>Synchro</strong><br />

and A Type gears.<br />

22A350 LAYGEAR, 13/19/23/26 teeth 1 1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22G76 LAYGEAR, 13/19/23/26 teeth 1 1962-63; 997 Cooper, A Type gears .<br />

22G197 LAYGEAR, 13/19/23/26 teeth 1 1963; 997 Cooper, A Type gears .<br />

22G204 LAYGEAR, 13/19/23/26 teeth 1 1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

22G231 LAYGEAR, 13/19/24/28 teeth 1 1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears .<br />

22G1100 LAYGEAR, 13/19/23/26 teeth 1 1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

5 22A1371 LAYSHAFT 1<br />

6 2A3581 PLATE,locating reverse idler shaft/layshaft 1<br />

7 88G396 BEARING, needle roller, laygear 2<br />

8 22G277 DISTANCE PIECE, bearing 1<br />

9 22G278 CIRCLIP, bearing retaining 2<br />

10 88G325 WASHER, thrust, large 1 0.123-0.124" (3.12-3.14mm).<br />

88G326 WASHER, thrust, large 1 0.125-0.126" (3.17-3.20mm).<br />

88G327 WASHER, thrust, large 1 0.127-0.128" (3.22-3.25mm).<br />

88G328 WASHER, thrust, large 1 0.130-0.131" (3.30-3.32mm).<br />

11 88G324 WASHER, thrust, small 1<br />

1st Motion Shaft<br />

12 22A88 SHAFT, 1st motion, 19 teeth, with cone 1 1959-62; 848 models, Cone <strong>Synchro</strong>.<br />

22A588 SHAFT, 1st motion, 19 teeth 1 1962-64; 848 models, A Type gears.<br />

22A257 SHAFT, 1st motion, 20 teeth, with cone 1 1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22A416 SHAFT, 1st motion, 20 teeth 1 1962-63; 997 Cooper, A Type gears .<br />

22A592 SHAFT, 1st motion, 20 teeth 1 1963; 997 Cooper, A Type gears .<br />

1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

22A979 SHAFT, 1st motion, 19 teeth 1 1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears .<br />

22A982 SHAFT, 1st motion, 20 teeth 1 1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

13 2A3693 CONE, synchronising 1 For 22A88 and 22A257 1st motion shafts.<br />

Note that synchro cones have to be shrunk onto their respective gears and then finally machined - not a<br />

task for most home-based Mini restorers.<br />

14 22G2033 RING, baulk 1 For all other 1st motion shafts .<br />

15 22G314 BEARING, 1st to 3rd motion shaft 1 For 22A88, 22A588, 22A257 and<br />

22A416 1st motion shafts .<br />

CHM172 BEARING, needle roller, 1st to 3rd 1 For 22A592, 22A979 and 22A982<br />

motion shaft<br />

1st motion shafts.<br />

16 2A3709 BEARING, 1st motion shaft 1 In gearbox case.<br />

17 2A3710 CIRCLIP, bearing retaining 1 0.094-0.096" (2.39-2.44mm)<br />

2A3711 CIRCLIP, bearing retaining 1 0.097-0.099" (2.46-2.51mm)<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

13


<strong>Manual</strong> <strong>Gearbox</strong> - 3 <strong>Synchro</strong> <strong>Internal</strong> <strong>Components</strong><br />

© Copyright Somerford Mini Limited<br />

14<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - 3 <strong>Synchro</strong> <strong>Internal</strong> <strong>Components</strong><br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

1st Motion Shaft (Continued)<br />

For the 1st motion shaft bearing supporting the nose of the shaft in the flywheel housing, please see<br />

the ‘Flywheel Housing and Clutch Cover’ section in the Somerford Mini Catalogue.<br />

3rd Motion Shaft<br />

18 2A3719 SHAFT, 3rd motion 1 1959-61; 848 models, Cone <strong>Synchro</strong>.<br />

1961; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22A425 SHAFT, 3rd motion 1 1961-62; 848 models, Cone <strong>Synchro</strong>.<br />

1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22A421 SHAFT, 3rd motion 1 1959-62; Cone <strong>Synchro</strong> to baulk ring<br />

synchro conversion item.<br />

22G70 SHAFT, 3rd motion 1 1962-64; 848 models, A Type gears .<br />

1962-63; 997 Cooper, A Type gears.<br />

1963; 997 Cooper, A Type gears .<br />

1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

22G392 SHAFT, 3rd motion 1 1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears.<br />

1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

19 22A422 WASHER, spacing 1 1959-62; Cone <strong>Synchro</strong> to baulk ring<br />

synchro conversion item.<br />

20 2A3712 BEARING, 3rd motion shaft 1 For 2A3719, 22A425 or 22A421 shafts.<br />

22A575 BEARING, 3rd motion shaft 1 1959-62; Cone <strong>Synchro</strong> to baulk ring<br />

type gearbox case conversion. For<br />

2A3719 or 22A425 shafts.<br />

AAU1365 BEARING, 3rd motion shaft 1 For 22G70 or 22G392 3rd motion shafts .<br />

21 2A3713 RING, spring, bearing retaining 1 Fit to 2A3712 bearing.<br />

ADU4992 RING, spring, bearing retaining 1 Fit to AAU1365 bearing.<br />

22 2A3716 RETAINER, 3rd motion shaft bearing 1 For 2A3712 3rd motion shaft bearing.<br />

22A522 RETAINER, 3rd motion shaft bearing 1 For AAU1365 3rd motion shaft bearing.<br />

23 SH505081 SCREW, retainer to gearbox case 4<br />

24 DAM2377 LOCK TAB, screw 2<br />

25 2A3714 SHIM, retainer A/R 0.003" (0.076mm)<br />

2A3715 SHIM, retainer A/R 0.010" (0.254mm)<br />

1st/2nd <strong>Synchro</strong>niser<br />

26 22A433 GEAR ASS’Y, 1st/2nd synchroniser 1 1959-62; 848 models, Cone <strong>Synchro</strong>.<br />

1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22G440 GEAR ASS’Y, 1st/2nd synchroniser 1 1962-64; 848 models, A Type gears .<br />

1962-63; 997 Cooper, A Type gears.<br />

1963; 997 Cooper, A Type gears .<br />

22A1021 GEAR ASS’Y, 1st/2nd synchroniser 1 1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears.<br />

1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

The 1st speed outer ring for the 22A1021 gear assembly is sometimes available separately as the repair<br />

part 22A1021A. However its compatibility with an old 2nd speed synchro hub cannot be completely<br />

guaranteed as the outer ring and hub were designed to be supplied as a matched pair.<br />

27 BLS107 BALL, synchroniser 6/3 Qty. 6 used on very ear ly Cone <strong>Synchro</strong>.<br />

28 22A367 SPRING , synchroniser 6/3 Qty. 6 used on very ear ly Cone <strong>Synchro</strong>.<br />

29 22G89 PLUNGER, 2nd speed synchroniser 1<br />

2nd Gear<br />

30 22A90 GEAR, 2nd speed, with synchro cone, 1 1959-62; 848 models, Cone <strong>Synchro</strong>.<br />

28 teeth 1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22A582 GEAR, 2nd speed, 28 teeth 1 1962-64; 848 models, A Type gears .<br />

1962-63; 997 Cooper, A Type gears.<br />

22G194 GEAR, 2nd speed, 28 teeth 1 1963; 997 Cooper, A Type gears .<br />

1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

22A980 GEAR, 2nd speed, 28 teeth 1 1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears.<br />

1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

31 2A3693 CONE, synchronising 1 For 22A90 2nd speed gear.<br />

32 22G2033 RING, baulk 1 For 22A582,22G194 or 22A980 gears.<br />

33 2A3042 WASHER, thrust, 2nd speed gear 1 1959-64; all Cone <strong>Synchro</strong> and A Type<br />

2nd speed gears.<br />

34 2A3298 BUSH, 2nd speed gear 1 For 22A90 or 22A582 2nd gears.<br />

35 22G374 RING, interlocking, 2nd/3rd gear bushes1 For 22A90 or 22A582 2nd gears.<br />

36 22G186 COLLAR, locking, 2nd speed gear 1 For 22G194 or 22A980 2nd gears.<br />

37 22G149 BEARING, needle roller, 2nd speed gear26 For 22G194 or 22A980 2nd gears.<br />

38 22G157 WASHER, 2nd speed gear locking collar 2 For 22G194 or 22A980 2nd gears.<br />

39 22A495 PEG, 2nd speed gear locking collar 1 For 22G194 or 22A980 2nd gears.<br />

40 22G154 SPRING, 2nd speed gear locking collar 1 For 22G194 or 22A980 2nd gears.<br />

3rd Gear<br />

41 22A89 GEAR, 3rd speed, 23 teeth, with cone 1 1959-62; 848 models, Cone <strong>Synchro</strong>.<br />

22A583 GEAR, 3rd speed, 23 teeth 1 1962-64; 848 models, A Type gears.<br />

22A261 GEAR, 3rd speed, 24 teeth, with cone 1 1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22A415 GEAR, 3rd speed, 24 teeth 1 1962-63; 997 Cooper, A Type gears .<br />

22G195 GEAR, 3rd speed, 24 teeth 1 1963; 997 Cooper, A Type gears .<br />

1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

22A981 GEAR, 3rd speed, 23 teeth 1 1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears .<br />

22A983 GEAR, 3rd speed, 24 teeth 1 1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

42 2A3693 CONE, synchronising 1 For 22A89 or 22A261 2nd speed gears.<br />

43 22G2033 RING, baulk 1 For all other 2nd speed gears.<br />

44 2A3290 BUSH, 3rd speed gear 1 For 22A89, 22A583, 22A261 or<br />

22A415 3rd speed gears.<br />

45 22A550 WASHER, thrust, 0.212-0.213" 1 For 22A89, 22A583, 22A261 or<br />

(5.38-5.41mm)<br />

22A415 3rd speed gears.<br />

22A536 WASHER, thrust, 0.214-0.215" 1 For 22A89, 22A583, 22A261 or<br />

(5.43-5.46mm)<br />

22A415 3rd speed gears.<br />

22A537 WASHER, thrust, 0.216-0.217" 1 For 22A89, 22A583, 22A261 or<br />

(5.48-5.51mm)<br />

22A415 3rd speed gears.<br />

22A538 WASHER, thrust, 0.218-0.219" 1 For 22A89, 22A583, 22A261 or<br />

(5.53-5.56mm)<br />

22A415 3rd speed gears.<br />

46 22A495 PEG, thrust washer 1 For 22A89, 22A583, 22A261 or<br />

22A415 3rd speed gears.<br />

47 22A528 SPRING, thrust washer 1 For 22A89, 22A583, 22A261 or<br />

22A415 3rd speed gears.<br />

48 22G149 BEARING, needle roller, 3rd speed gear 26 For 22G195, 22A981 or 22A983<br />

3rd speed gears.<br />

49 22G196 COLLAR, locking, 3rd speed gear 1 For 22G195, 22A981 or 22A983<br />

3rd speed gears.<br />

50 22A495 PEG, 3rd speed gear locking collar 1 For 22G195, 22A981 or 22A983<br />

3rd speed gears.<br />

51 22G154 SPRING, 3rd speed gear locking collar 1 For 22G195, 22A981 or 22A983<br />

3rd speed gears.<br />

3rd/4th <strong>Synchro</strong>niser<br />

52 22A26 GEAR ASS’Y, 3rd/4th synchroniser 1 1959-62; 848 models, Cone <strong>Synchro</strong>.<br />

1961-62; 997 Cooper, Cone <strong>Synchro</strong>.<br />

22G97 GEAR ASS’Y, 3rd/4th synchroniser 1 1962-64; 848 models, A Type gears.<br />

1962-63; 997 Cooper, A Type gears .<br />

22G410 GEAR ASS’Y, 3rd/4th synchroniser 1 1963; 997 Cooper, A Type gears .<br />

1963-64; 997/998 Cooper, 1071<br />

Cooper S , A Type gears with B Type<br />

1st/2nd synchroniser and reverse.<br />

1964-68; 848 and 998 (not Cooper)<br />

models, B Type gears .<br />

1964-68; 998 Cooper, 970/1071/1275<br />

Cooper S, B Type gears .<br />

53 BLS107 BALL, synchroniser 6/3 Qty. 6 used on Cone <strong>Synchro</strong>.<br />

54 22A367 SPRING, synchroniser 6/3 Qty. 6 used on Cone <strong>Synchro</strong>.<br />

Final Drive Pinion<br />

55 22G99 PINION, final drive , 15 teeth, 4.333:1 ratio 1 With 65 tooth 22G443 final drive gear.<br />

22G99 PINION, final drive , 15 teeth, 4.267:1 ratio 1 With 64 tooth 22G370 final drive gear.<br />

22G99 PINION, final drive , 15 teeth, 4.133:1 ratio 1 With 62 tooth 22G101 final drive gear.<br />

22G338 PINION, final drive , 16 teeth, 3.938:1 ratio 1 With 63 tooth 22G340 final drive gear.<br />

22A399 PINION, final drive , 17 teeth, 3.765:1 ratio 1 With 64 tooth 22A401 final drive gear.<br />

22A399 PINION, final drive , 17 teeth, 3.647:1 ratio 1 With 62 tooth 22G940 final drive gear.<br />

22A413 PINION, final drive , 18 teeth, 3.444:1 ratio 1 With 62 tooth 22A411 final drive gear.<br />

56 2A3575 NUT, pinion retaining 1 For 2A3719 3rd motion shaft.<br />

57 2A3576 LOCK TAB, pinion nut 1 For 2A3719 3rd motion shaft.<br />

58 DAM7485 NUT, pinion retaining 1 For all other 3rd motion shafts .<br />

59 DAM6140 LOCK TAB, pinion nut 1 For all other 3rd motion shafts .<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

15


<strong>Manual</strong> <strong>Gearbox</strong> - 4 <strong>Synchro</strong> <strong>Internal</strong> <strong>Components</strong><br />

© Copyright Somerford Mini Limited<br />

16<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - 4 <strong>Synchro</strong> <strong>Internal</strong> <strong>Components</strong><br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

The 4 <strong>Synchro</strong> <strong>Gearbox</strong><br />

1968 On<br />

Fortunately 4 synchro gearboxes are much easier to identify and classify than their 3 synchro<br />

predecessors (parts availability is considerably better, too, but not brilliant in some areas). The two<br />

main changes are the modification of gear shafts and several of the bearings in 1979, and A Plus gears.<br />

A Plus gears were pro gressively introduced, the bulk of models changing over around 1982. The y have<br />

a sharper tooth angle and different pitch making them quieter than the earlier gears, with which they<br />

are not interchangeable. A Plus gears may be identified by the presence of a circumferential groo ve in<br />

the centre of the teeth, plus flush machining on both sides of the final drive pinion.<br />

The following summaries help with identification and give you points to watch for when ordering par ts:<br />

DAM3092 SHAFT, 1st motion, 17 teeth 1 1979-82; not 1275 models.<br />

DAM3167 SHAFT, 1st motion, 18 teeth 1 1979-80; 1275 models.<br />

DAM4930 SHAFT, 1st motion, 17 teeth, A Plus type 1 1982 on; not 1990-96, 1275 (France).<br />

DAM6242 SHAFT, 1st motion, 16 teeth, A Plus type 1 1990-96, 1275 (France).<br />

16 22G2033 RING, baulk 1<br />

17 CHM172 BEARING, 1st/3rd motion shafts, 9/16” i.d.1 For 22G1093/22G1371 1st motion shafts.<br />

13H9513 BEARING, 1st/3rd motion shafts, 11/16” i.d.1 For all other 1st motion shafts .<br />

18 ADU7619 BEARING, 1st motion shaft 1 In gearbox case.<br />

19 22G850 CIRCLIP, bearing retaining 1 0.094-0.096" (2.39-2.44mm)<br />

22G851 CIRCLIP, bearing retaining 1 0.097-0.099" (2.46-2.51mm)<br />

For the 1st motion shaft bearing supporting the nose of the shaft in the flywheel housing, please see the<br />

‘Flywheel Housing and Clutch Cover’ section of the Somerford Mini Catalogue.<br />

1968-73 Saloon and Estate, 1968-75 Van and Pick Up<br />

Pre-A Plus gears. Direct/remote gearchange type reverse gear and mainshaft bearing retainer (four<br />

screw fitting). 9/16" dia. nose on 3rd motion shaft, two step layshaft, laygear takes two large bearings<br />

and one small bearing. Different ratios for 1275 models.<br />

1973-79 Saloon and Estate, 1975-79 Van and Pick Up<br />

Pre-A Plus gears. Rod gearchange type reverse gear and mainshaft bearing retainer (4 screw fitting).<br />

9/16" dia. nose on 3rd motion shaft, two step la yshaft,laygear takes two large bearings and one small<br />

bearing. Different ratios for 1275 models .<br />

1979-82<br />

Pre-A Plus gears (except for final drive pinion on 3.444:1 ratio models, which became A Plus in 1979).<br />

Rod gearchange type reverse gear and mainshaft bearing retainer (4 screw fitting). 11/16" dia. nose on<br />

3rd motion shaft, three step layshaft, laygear takes one large and one small bearing. Idler and 1st<br />

motion shaft drive gear ratios revised, idler gear bearings in gearbox case revised (diameter change).<br />

Different ratios for 1275 models.<br />

3rd Motion Shaft<br />

20 22G833 SHAFT, 3rd motion, 9/16" nose dia. 1 1968-79.<br />

DAM7484 SHAFT, 3rd motion, 11/16" nose dia. 1 1979 on.<br />

21 AAU1365 BEARING, 3rd motion shaft 1<br />

22 ADU4992 RING, spring, bearing retaining 1<br />

23 22A522 RETAINER, 3rd motion shaft bearing, 1 1968-73, Saloons and Estates;<br />

4 screw fixing, direct/remote change type 1968-75, Vans and Pick Ups.<br />

DAM1756 RETAINER, 3rd motion shaft bearing, 1 1973-84, Saloons and Estates;<br />

4 screw fixing, rod change type 1976-84, Vans and Pick Ups.<br />

24 DAM5996 RETAINER, 3rd motion shaft bearing, 1 1984 on.<br />

3 screw fixing, rod change type<br />

25 SH505071 SCREW, retainer to gearbox case 4/3 Qty. 4 for 22A522/DAM1756 retainers .<br />

26 DAM2377 LOCK TAB, screw 2/1 Qty. 2 for 22A522/DAM1756 retainers .<br />

27 DAM6047 LOCK TAB, screw 1 For DAM5996 retainer.<br />

28 2A3714 SHIM, retainer A/R 0.003" (0.076mm)<br />

2A3715 SHIM, retainer A/R 0.010" (0.254mm)<br />

1982 on<br />

A Plus gears. Rod gearchange type reverse gear and mainshaft bearing retainer (4 screw fitting<br />

reducing to 3 screw fitting in 1984). 11/16" dia. nose on 3rd motion shaft, three step layshaft, laygear<br />

takes one large and one small bearing. Different ratios for French 1275 models in the 1990s.<br />

Close ratio and straight cut close ratio gear sets are available for 4 synchro pre-A Plus and A Plus<br />

gearboxes, as special orders; please contact us for details. Similarly, contact us if you already have<br />

Special Tuning helical close ratio or straight cut close ratio gears and you require replacement parts.<br />

Reverse Idler Gear<br />

1 22G1034 REVERSE IDLER, 17/18 teeth, 1 1968-73, Saloons and Estates;<br />

direct/remote gearchange type<br />

1968-75, Vans and Pick Ups.<br />

22G1832 REVERSE IDLER, 17/18 teeth, 1 1973-79, Saloons and Estates;<br />

rod gearchange type<br />

1976-79, Vans and Pick Ups.<br />

TUB10020 REVERSE IDLER, 17/18 teeth, 1 1979 on.<br />

rod gearchange type<br />

2 TUJ10001 BUSH, reverse idler 1<br />

3 DAM8038 SHAFT, reverse idler 1<br />

Laygear<br />

4 22G927 LAYGEAR, 15/20/25/29 teeth 1 1968-79; 2 step layshaft, not 1275.<br />

22G1040 LAYGEAR, 15/20/25/29 teeth 1 1968-79; 2 step layshaft, 1275.<br />

5 DAM3169 LAYGEAR, 15/20/25/29 teeth 1 1979-82; 3 step layshaft, not 1275.<br />

DAM3168 LAYGEAR, 15/20/25/29 teeth 1 1979-80; 3 step layshaft, 1275.<br />

DAM4931 LAYGEAR, 15/21/26/30 teeth, A Plus type 1 1982 on; 3 step layshaft,<br />

not 1990-96, 1275 France .<br />

DAM6238 LAYGEAR, 15/21/27/31 teeth, A Plus type 1 1990-96, 3 step layshaft, 1275 France.<br />

6 22G931 LAYSHAFT, two step type 1 Fit to 22G927 and 22G1040 laygears.<br />

7 DAM3187 LAYSHAFT, three step type 1 Fit to all other laygears .<br />

8 2A3581 PLATE, locating reverse idler shaft/layshaft 1<br />

9 CHM141 BEARING, needle roller, laygear, large 2/1 Qty. 2 in 22G927/22G1040 gears only.<br />

10 88G396 BEARING, needle roller, laygear, small 1 Fit to 22G927 and 22G1040 gears only.<br />

11 13H9513 BEARING, needle roller, laygear, small 1 Fit to all other laygears .<br />

12 22G856 WASHER, thrust, small, 0.123-0.124" 1 Fit to 22G927 and 22G1040 laygears.<br />

(3.12-3.14mm)<br />

22G857 WASHER, thrust, small, 0.125-0.126" 1 Fit to 22G927 and 22G1040 laygears.<br />

(3.17-3.20mm)<br />

22G858 WASHER, thrust, small, 0.127-0.128" 1 Fit to 22G927 and 22G1040 laygears.<br />

(3.22-3.25mm)<br />

22G859 WASHER, thrust, small, 0.130-0.131" 1 Fit to 22G927 and 22G1040 laygears.<br />

(3.30-3.32mm)<br />

13 DAM3180 WASHER, thrust, small, 0.121-0.123" 1 Fit to DAM3169, DAM3168, DAM4931<br />

(3.07-3.12mm) and DAM6238 laygears .<br />

DAM3181 WASHER, thrust, small, 0.124-0.126" 1 Fit to DAM3169, DAM3168, DAM4931<br />

(3.15-3.20mm) and DAM6238 laygears .<br />

DAM3182 WASHER, thrust, small, 0.127-0.129" 1 Fit to DAM3169, DAM3168, DAM4931<br />

(3.22-3.27mm) and DAM6238 laygears .<br />

DAM3183 WASHER, thrust, small, 0.130-0.132" 1 Fit to DAM3169, DAM3168, DAM4931<br />

(3.30-3.35mm) and DAM6238 laygears .<br />

14 22G860 WASHER, thrust, large 1<br />

1st Motion Shaft<br />

15 22G1093 SHAFT, 1st motion, 17 teeth 1 1968-79; not 1275 models.<br />

22G1371 SHAFT, 1st motion, 18 teeth 1 1968-79; 1275 models.<br />

1st Gear<br />

29 22G1096 GEAR, 1st speed, 31 teeth 1<br />

30 22G2033 RING, baulk 1<br />

31 AAU1815 BEARING, needle roller, 1st speed gear 1<br />

32 22G837 JOURNAL, 1st speed gear 1<br />

1st/2nd <strong>Synchro</strong>niser<br />

33 DAM7455 GEAR ASS’Y, 1st/2nd synchroniser 1<br />

34 BLS107 BALL, synchroniser 3<br />

35 22G2262 SPRING, synchroniser 3<br />

2nd Gear<br />

36 22G1094 GEAR, 2nd speed, 26 teeth 1 1968-82.<br />

DAM4932 GEAR, 2nd speed, 26 teeth, A Plus type 1 1982 on; not 1990-96, 1275 (France).<br />

DAM6240 GEAR, 2nd speed, 25 teeth, A Plus type 1 1990-96, 1275 (France).<br />

37 22G2033 RING, baulk 1<br />

38 AAU1816 BEARING, needle roller, 2nd speed gear 1<br />

39 22G839 WASHER, thrust, 2nd speed gear 1<br />

40 22G843 PEG, 2nd speed gear 2<br />

41 22G154 SPRING, 2nd speed gear 1<br />

3rd Gear<br />

42 22G1095 GEAR, 3rd speed, 21 teeth 1 1968-82.<br />

DAM4933 GEAR, 3rd speed, 21 teeth, A Plus type 1 1982 on; not 1990-96, 1275 (France).<br />

DAM6241 GEAR, 3rd speed, 20 teeth, A Plus type 1 1990-96, 1275 (France).<br />

43 22G2033 RING, baulk 1<br />

44 AAU1816 BEARING, needle roller, 3rd speed gear 1<br />

45 22G947 WASHER, thrust, 3rd speed gear 1<br />

46 22G843 PEG, 3rd speed gear 1<br />

47 22G154 SPRING, 3rd speed gear 1<br />

3rd/4th <strong>Synchro</strong>niser<br />

48 DAM7456 GEAR ASS’Y, 3rd/4th synchroniser 1<br />

49 BLS107 BALL, synchroniser 3<br />

50 22G2262 SPRING, synchroniser 3<br />

Final Drive Pinion<br />

51 22G99 PINION, 15 teeth, 4.333:1 ratio 1 With 65 tooth 22G443 final drive gear.<br />

22G99 PINION, 15 teeth, 4.267:1 ratio 1 With 64 tooth 22G370 final drive gear.<br />

22G99 PINION, 15 teeth, 4.133:1 ratio 1 With 62 tooth 22G101 final drive gear.<br />

22G338 PINION, 16 teeth, 3.938:1 ratio 1 With 63 tooth 22G340 final drive gear.<br />

22A399 PINION, 17 teeth, 3.765:1 ratio 1 With 64 tooth 22A401 final drive gear.<br />

22A399 PINION, 17 teeth, 3.647:1 ratio 1 With 62 tooth 22G940 final drive gear.<br />

22A413 PINION, 18 teeth, 3.444:1 ratio 1 With 62 tooth 22A411 final drive gear.<br />

DAM3647 PINION, 15 teeth, A Plus, 4.333:1 ratio 1 With 65 tooth DAM3645 final drive gear.<br />

DAM3218 PINION, 16 teeth, A Plus, 3.938:1 ratio 1 With 63 tooth DAM3216 final drive gear.<br />

DAM4131 PINION, 17 teeth, A Plus, 3.765:1 ratio 1 With 64 tooth DAM4779 final drive gear.<br />

DAM4131 PINION, 17 teeth, A Plus, 3.647:1 ratio 1 With 62 tooth DAM4162 final drive gear.<br />

DAM2679 PINION, 18 teeth, A Plus, 3.444:1 ratio 1 With 62 tooth DAM2677 final drive gear.<br />

DAM2808 PINION, 19 teeth, A Plus, 3.211:1 ratio 1 With 61 tooth DAM2806 final drive gear.<br />

DAM2808 PINION, 19 teeth, A Plus, 3.105:1 ratio 1 With 59 tooth DAM6327 final drive gear.<br />

DAM5927 PINION, 20 teeth, A Plus, 2.950:1 ratio 1 With 59 tooth DAM5925 final drive gear.<br />

TCC10001 PINION, 21 teeth, A Plus, 2.762:1 ratio 1 With 58 tooth TCB10004 final drive gear.<br />

52 DAM7485 NUT, pinion retaining 1<br />

53 DAM6140 LOCK TAB, pinion nut 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

17


<strong>Manual</strong> <strong>Gearbox</strong> - Selectors and Speedometer Drives<br />

© Copyright Somerford Mini Limited<br />

18<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - Selectors and Speedometer Drives<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Direct and Remote Gearchange Selectors<br />

1959-73, Saloon and Estate; 1960-75, Van and Pick Up<br />

1 22A611 FORK, 1st and 2nd speed 1 3 synchromesh, 1959-68.<br />

22G889 FORK, 1st and 2nd speed 1 4 synchromesh, 1968 on.<br />

2 22A167 ROD, 1st and 2nd speed fork 1 3 synchromesh, 1959-68.<br />

22G821 ROD, 1st and 2nd speed fork 1 4 synchromesh, 1968 on.<br />

3 22A610 FORK, 3rd and 4th speed 1<br />

4 22A168 ROD, 3rd and 4th speed fork 1 3 synchromesh, 1959-68.<br />

22G822 ROD, 3rd and 4th speed fork 1 4 synchromesh, 1968 on.<br />

5 22G827 FORK, reverse 1<br />

6 22A169 ROD, reverse fork 1<br />

7 88G213 SELECTOR, reverse fork rod 1<br />

8 22G826 LEVER, reverse fork 1<br />

9 2A3504 PIVOT PIN, reverse fork lever 1<br />

10 CCN108 CIRCLIP, lever to pivot pin 1<br />

11 2A3492 SCREW, fork and selector locating 3<br />

12 LWZ404 WASHER, shakeproof 3<br />

13 FNZ604 NUT, locking 3<br />

When reassembling the gearbox, ensure that the fork locating screws are securely locked in place. It’s<br />

not unknown for one of them to vibrate loose otherwise, allowing a fork to slide on its rod and<br />

resulting in a complete loss of ability to select the gears operated by that fork; removal of the engine<br />

and gearbox from the car to tighten up one screw is a painful lesson indeed.<br />

Somerford Mini remembers one occasion where two valiant souls entered in the Italian Job event<br />

drove their Mini right the way through the Alps and most of the way across northern Italy in<br />

first and second gears only, the third/fourth selector fork screw having worked loose! The engine<br />

and gearbox duly removed in an Italian hotel car park, the screw was retightened allowing the<br />

Mini to return across Europe to Britain under its own steam and with a full complement of<br />

forward gears (which no doubt allowed the drivers’ hearing to recover somewhat).<br />

14 22G411 PLUNGER, fork rod detent 3<br />

15 2A3647 SPRING , plunger 3<br />

16 22A387 PLUG, detent bore 2<br />

17 AED172 WASHER, sealing 2<br />

18 22A208 GATE, gearchange 1<br />

19 88G231 SHAFT, gearchange 1<br />

20 13H577 OIL SEAL, shaft 1<br />

21 88G222 LEVER, gearchange operating 1<br />

22 WKN404 KEY, lever 1<br />

23 2A3335 SCREW, operating lever to gearchange 1<br />

shaft<br />

24 LWZ405 WASHER, shakeproof 1<br />

25 88G224 LEVER, gearchange shaft 1<br />

26 2A3335 SCREW, lever to gearchange shaft 1<br />

27 LWZ305 WASHER, locking 1<br />

28 88G223 LEVER, remote control shaft 1<br />

29 2A3335 SCREW, lever to remote control shaft 1<br />

30 LWZ305 WASHER, locking 1<br />

31 2A3467 BUTTON, thrust 1 Direct gearchange models .<br />

32 2A3390 SPRING , thr ust button 1 Direct gearchange models .<br />

33 88G233 SHAFT, remote control 1 Direct gearchange models , 1959-68.<br />

34 88G553 SHAFT, remote control 1 Direct gearchange models , 1968 on.<br />

35 22A1832 SEAT, gear lever 1 Direct gearchange models , 1968 on.<br />

36 22A1377 BUSH, gear lever seat, rubber 1 Direct gearchange models , 1968 on.<br />

37 22A1378 SLEEVE, bush 1 Direct gearchange models , 1968 on.<br />

38 22A253 SHAFT, remote control 1 Remote gearchange models.<br />

39 22G79 LEVER, bellcrank 1 Remote gearchange models.<br />

40 22G259 PIN, pivot 1<br />

41 PWZ107 WASHER, plain 1<br />

42 22A398 WASHER, anti-rattle A/R<br />

43 22G174 WASHER, anti-rattle A/R<br />

22G175 WASHER, anti-rattle A/R<br />

44 22A191 PLUNGER, reverse detent 1<br />

45 2A3647 SPRING , plunger 1<br />

46 22A149 PLUG, detent bore 1<br />

47 AED172 WASHER, sealing 1<br />

48 22G351 PLUNGER, reversing light switch 1 Direct gearchange models with<br />

reversing light fitted.<br />

49 UHN305 NIPPLE, lubricating, remote control 1<br />

50 2K4973 WASHER, sealing 1<br />

Rod Gearchange Selectors<br />

1973 On, Saloon and Estate; 1976 On, Van and Pick Up<br />

51 TSP100390 FORK, 1st and 2nd speed 1<br />

52 TSP100400 FORK, 3rd and 4th speed 1<br />

53 22G1854 SHAFT, selector forks 1<br />

54 22G2595 ROLL PIN, 3rd and 4th speed fork to 1<br />

shaft<br />

55 22G1858 SHAFT, selector 1<br />

56 AHU1672 OIL SEAL, selector shaft, in differential 1<br />

cover<br />

57 DAM7764 BUSH, selector shaft 1 1973-85 approx.; replace with<br />

SSK001 selector oil seal kit.<br />

58 DAM8706 BUSH, aluminium, selector shaft 1 1985 approx. on (improved design).<br />

59 CDU1563 O RING, selector shaft 1 1985 approx. on (improved design).<br />

60 DAM3022 GAITER, selector shaft 1<br />

Selector shaft oil seal failure was always a problem on rod gearchange Minis (as any late-model Mini<br />

owner with oil drips on their garage floor will know). The most common remedy effected by owners in<br />

the past was to put two oil seals one behind the other on the selector shaft (there’s just enough space<br />

to do so), the outer one of the tw o acting both as a secondary seal and also as a secondary shield<br />

behind the gaiter, protecting the inner seal from under-body muck and grit. Most importantly, the<br />

second seal helped to support the selector shaft and hold it in alignment in the gearbox casing.<br />

Factory engineers finally came up with a remedy in 1985, fitting a modified selector shaft bush with a<br />

new O ring to improve the selector shaft alignment. Somerford Mini of course supply all these<br />

parts separately, but we’ve also put them together as an easy-to-buy, easy-to-fit kit for the owner<br />

to modify a pre-1985 Mini or repair a later model:<br />

61 SSK001 SELECTOR OIL SEAL KIT 1 Includes oil seal, gaiter and<br />

improved bush and O ring.<br />

62 22G1844 SPOOL, interlock 1<br />

63 BLS110 BALL, detent 1<br />

64 22G2083 SPRING, detent ball 1<br />

65 22G1870 SLEEVE, detent 1<br />

66 22G1417 O RING, sleeve 1<br />

67 22G1845 PIN, pivot, bellcrank 1<br />

68 31B447 O RING, pivot pin 1<br />

69 42H1077 BUSH, pivot pin 1<br />

70 AHU2292 LEVER, selector release 1<br />

71 22G1847 LEVER, bellcrank, lower 1<br />

72 42H1081 SPACER, bellcrank 2<br />

73 22G1848 LEVER, bellcrank, upper 1<br />

74 PWZ306 WASHER, plain 1<br />

75 LNZ206 NUT, locking 1<br />

Speedometer Drives<br />

76 22A1881 PINION, 17 teeth (off white nylon) 1 1959-84, 10" road wheels (plus 12"<br />

wheels, 1275 GT).<br />

1984-94, 998 and 1275 carb (not<br />

France).<br />

3.105:1 final drive.<br />

DAM2905 PINION, 16 teeth (green nylon) 1 1984-92, 998.<br />

3.444:1 final drive.<br />

TXD10006 PINION, 18 teeth (red nylon) 1 1991 on, 1275 SPi (not F rance).<br />

3.211:1 final drive.<br />

TXD10004 PINION, 15 teeth (black nylon) 1 1990 on, 1275 carb (France) and SPi<br />

(France), all 1275 MPi models.<br />

2.762:1 final drive.<br />

77 2A3624 BUSH, steel, speedometer pinion 1<br />

78 DAM8488 BUSH, speedometer cable attachment 1<br />

79 2A3628 GASKET, bush 1<br />

80 SH504071 SCREW, coarse thread, bush to housing 1<br />

81 LWZ304 WASHER, locking 1<br />

82 22A862 PLATE, bush retaining 1<br />

83 2A3720 GEAR, drive, 6 teeth (not paint coded) 1 1959-84, 10" road wheels (plus 12"<br />

wheels, 1275 GT).<br />

1984-94, 12” road wheels, 998 and<br />

1275 carb (not France).<br />

3.105:1 final drive.<br />

DAM6028 GEAR, drive, 7 teeth (blue paint coded) 1 1984-92, 12” road wheels, 998.<br />

3.444:1 final drive.<br />

TXF10004 GEAR, drive, 5 teeth (red paint coded) 1 1991 on, 12” and 13” road wheels,<br />

1275 SPi (not France).<br />

3.211:1 final drive.<br />

TXF10001 GEAR, drive, 7 teeth (yellow paint coded) 1 1990 on, 12” and 13” road wheels,<br />

1275 carb (France) and SPi (France),<br />

all 1275 MPi models.<br />

2.762:1 final drive.<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

19


<strong>Manual</strong> <strong>Gearbox</strong> - Direct and Remote Gearchanges<br />

© Copyright Somerford Mini Limited<br />

20<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - Direct and Remote Gearchanges<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Direct and Remote Gearchange<br />

Direct gearchange (where the gearlever disappears through the toeboard straight into the back of the<br />

gearbox) was the system the Mini star ted with back in 1959. Its fitment was interspersed with the<br />

remote gearchange system (where the gearlever emerged from the end of a long aluminium casting<br />

under the floor) through the 1960s to the early 1970s - by rule of thumb, more upmarket Minis got<br />

the remote gearchange while more basic models (i.e. lowly 850s) carried on with the direct version.<br />

Calling it ‘direct’ was probably a bit of a misnomer, as the nicknames of ‘Magic Wand’ and ‘Pudding<br />

Stirrer’ hinted that in practice changing gear was not alwa ys that direct...<br />

While the direct and remote change systems are very obviously totally different, they share the same<br />

gear selector mechanism inside the gearbox. From late 1968 when the gearbox went over from 3 to 4<br />

synchromesh, they shared the same differential housing too - prior to that, the direct gearchange had<br />

its own unique diff housing with a small gearchange tower on it.<br />

The later rod change system (see the next section for details) required a complete redesign of the gear<br />

selector mechanism. Saloons and Estates were re-engineered for rod gearchange for the 1973 model<br />

year. Vans and Pick Ups however did not lose their direct gearchange in favour of rod change until the<br />

end of 1975.<br />

Direct Gearchange<br />

1959-68<br />

1 22A91 GEAR LEVER, straight 1 1959-61.<br />

2 88G232 GEAR LEVER, crank ed 1 1961-68.<br />

3 2A3383 KNOB, gear lever 1 1959-64.<br />

4 53K1722 NUT, locking knob 1 1959-64.<br />

5 22G110 KNOB, gear lever 1 1964-68.<br />

6 22A418 COVER, gear lever seat 1<br />

7 22A419 GAITER, gear lever 1<br />

8 22A394 GASKET, gear lever seat cover 1<br />

9 SH605051 SCREW, coarse thread, cover retaining 2<br />

10 LWZ305 WASHER, locking 2<br />

11 2A3602 PIN, gearlever locating 1<br />

12 LWZ304 WASHER, locking 1<br />

13 22A305 COVER, gearchange , differential cover 1 1959-62; cone synchro gearboxes.<br />

22A516 COVER, gearchange , differential cover 1 1962-68; baulk ring synchro gearboxes.<br />

14 SH504051 SCREW, coarse, cover to differential cover 4<br />

15 LWZ304 WASHER, locking 4<br />

16 22A84 PLUNGER, anti-rattle, gear lever 1<br />

17 AEG3123 SPRING , plunger 1<br />

18 22A85 CAP, plunger and spring retaining 1<br />

19 AEG3122 WASHER, cap 1<br />

20 14A6860 GAITER, gear lever 1<br />

21 14A6861 PLATE, gear lever gaiter to floor 1<br />

22 36052Z SCREW, self tapping, plate to floor 4<br />

Direct Gearchange<br />

1968-73 Saloons<br />

1968-75 Vans and Pick Ups<br />

23 22A1382 GEAR LEVER 1<br />

24 22G110 KNOB, gear lever 1<br />

25 22A1380 GAITER, gear lever 1<br />

26 22A1381 RING, gaiter retaining 1<br />

27 22A1717 COVER, gear lever seat 1<br />

28 SH506061 SCREW, coarse thread, cover retaining 4<br />

29 LWZ306 WASHER, locking 4<br />

30 22A285 PLUG, rubber 1<br />

31 22A1832 SEAT, gear lever 1<br />

32 22A1377 BUSH, gear lever seat, rubber 1<br />

33 22A1378 SLEEVE, bush 1<br />

34 14A6860 GAITER, gear lever 1<br />

35 14A6861 PLATE, gear lever gaiter to floor 1<br />

36 36052Z SCREW, self tapping, plate to floor 4<br />

Remote Gearchange<br />

1961-73<br />

37 22A269 GEAR LEVER 1 1961-64.<br />

38 2A3383 KNOB, gear lever 1 1961-64.<br />

39 53K1722 NUT, locking knob 1 1961-64.<br />

40 22G158 BUTTON, thrust 1 1961-64.<br />

41 22G159 SPRING , thr ust button 1 1961-64.<br />

42 22A391 RETAINER, gear lever 1 1961-64.<br />

43 22A394 GASKET, retainer 1 1961-64.<br />

44 22A392 FLANGE, retainer, nylon 1 1961-64.<br />

45 22A393 O RING 1 1961-64.<br />

46 SH505071 SCREW, coarse thread, retainer to remote 2 1961-64.<br />

47 LWZ305 WASHER, locking 2 1961-64.<br />

48 22G1190 GEAR LEVER, chrome 1 1964-73.<br />

22A1586 GEAR LEVER, black 1 1964-73.<br />

49 22G110 KNOB, gear lever 1 1964-73.<br />

50 22G389 BUSH, split 1 1964-73.<br />

51 22G292 FLANGE, retainer, nylon 1 1964-73.<br />

52 22G286 SPRING 1 1964-73.<br />

53 22G290 RETAINER, gear lever 1 1964-73.<br />

54 88G228 DISTANCE PIECE 1 1964-73.<br />

55 22G291 SCREW, retainer 2 1964-73.<br />

56 LWZ505 WASHER, locking 2 1964-73.<br />

57 2A3602 PIN, gear lever locating 1<br />

58 LWZ304 WASHER, locking 1<br />

59 22A267 LEVER, primary shaft 1<br />

60 2A3335 SCREW, lever to primary shaft 1<br />

61 LWZ305 WASHER, locking 1<br />

62 8G713 PRIMARY SHAFT, remote control 1<br />

63 22A250 HOUSING, remote control 1<br />

The 22A250 housing listed here attaches directly to the gearbox via four screws from underneath. The<br />

earliest 997cc Coopers however had a housing which attached from the sides, in a similar fashion to the<br />

Austin/Morris 1100 saloon of the period,but without the rubber ‘sandwich’ mounting used on those cars.<br />

This side-attached remote housing is not referred to in any of the factory parts catalogues, but - guess<br />

what - Somerford Mini have some still in stock at time of writing. Please phone for details.<br />

64 22A271 PLUG, gear lever seat access 1<br />

65 22A285 PLUG, rubber 1<br />

66 22A1373 PAD,remote to gearbox case 1<br />

67 SH506091 SCREW, coarse thread, short, remote to 2<br />

gearbox case<br />

68 SH506281 SCREW, coarse thread,long, remote to 2<br />

gearbox case<br />

69 LWZ306 WASHER, locking 4<br />

70 22A84 PLUNGER, control shaft damping 1<br />

71 AEG3123 SPRING, plunger 1<br />

72 22A85 CAP, plunger and spring retaining 1<br />

73 AEG3122 WASHER, cap 1<br />

74 14A9941 GAITER,gearlever, domed 1 1961-64.<br />

75 22A608 GAITER,gearlever, convoluted 1 1964-73.<br />

76 14A9942 PLATE, gearlever gaiter to floor 1<br />

77 36052Z SCREW, plate to floor 4<br />

78 21A956 MOUNTING, rubber, remote control 1<br />

79 SH505061 SCREW, mounting to remote 2<br />

80 LWZ205 WASHER, locking 2<br />

81 21A745 BRACKET, mounting to floor 1<br />

82 FNZ106 NUT,mounting to bracket 1<br />

83 LWZ306 WASHER, locking 1<br />

84 PWZ206 WASHER, plain, large 1<br />

85 SH605061 SCREW, bracket to floor 3<br />

86 53K3439 WASHER, ‘D’ 3<br />

87 PWZ105 WASHER, plain 3<br />

88 LWZ205 WASHER, locking 3<br />

89 FNZ105 NUT 3<br />

90 GAE131 SWITCH, reversing lights 1<br />

91 2K7914 WASHER, fibre , switch spacing A/R<br />

Remote Gearchange Quickshift Kit<br />

Available as an easy-to-fit conversion for 1964-73 remote gearchanges, the quickshift drastically cuts the<br />

truck-lik e distance between gears, making gearchanges a fast, efficient pleasure instead of a work-out for<br />

your arm! Engineered with great integrity by Kent Auto Developments, the kit includes a new, chromed<br />

gear lever and bush, revised nylon retainer flange and longer retainer screws.<br />

92 1013218 QUICKSHIFT KIT 1 1964-73.<br />

Accessory Gear Lever Knobs<br />

Accessory Mini gear lever knobs are available from Somerford Mini to spruce up your gear lever,<br />

providing a smart alternative to the often basic and frequently unavailable original knobs. Please order<br />

by selecting the relevant part number for leather, wood or burr walnut finish, and then quote in your<br />

order the insert badge you require; you can choose from the following:<br />

‘Mini’ (with side view of car)<br />

Mini winged logo<br />

‘Cooper’<br />

Mini Cooper laurel wreath<br />

‘GT’<br />

Union flag<br />

Chequered flags<br />

Skull and crossbones (hmm... nice!)<br />

93 BG2702 KNOB, gear lever, black leather 1<br />

94 BG2602 KNOB, gear lever, wood 1<br />

BWGK KNOB, gear lever, burr walnut 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

21


<strong>Manual</strong> <strong>Gearbox</strong> - Rod Gearchange<br />

© Copyright Somerford Mini Limited<br />

22<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


<strong>Manual</strong> <strong>Gearbox</strong> - Rod Gearchange<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Rod Gearchange<br />

Introduced for 1973 on Mini Saloons and Estates and for 1976 on Vans and Pick Ups, the rod change<br />

system was simpler (kept the production engineers happy) and therefore cheaper (happy accountants),<br />

more robust (happy owners) and easier to use (ditto) than the previous choice of direct or remote<br />

gearchange. The ‘modified Mini’ frater nity mourned the loss of positive location offered by the outgoing<br />

remote system’s beefy casting, but soon welcomed the extra space inside the gearbox case which just<br />

about allowed the dream of a five speed Mini gearbox conversion to become reality.<br />

The success of the rod change gearbox led to it being used virtually without modification for the last<br />

27 years of the Mini’s 41 year production life.<br />

1 22A1932 GEAR LEVER 1 1973-96.<br />

UKE100790 GEAR LEVER 1 1997 on.<br />

2 22G2316 KNOB, gear lever, Bakerlite 1 1973-80.<br />

3 22G2319 KNOB, gear lever, wood 1 1979, Mini Special.<br />

4 DAM4440 KNOB, gear lever, nylon with clear plastic 1 1980-85.<br />

insert<br />

5 UKJ10005 KNOB, gear lever, nylon with clear plastic 1 1985-96.<br />

insert<br />

6 UKJ100220 KNOB, gear lever, wood 1 1993-96, certain limited editions.<br />

7 UKJ100410PMA KNOB, gear lever, leather, Black 1 1997 on.<br />

UKJ100410SMK KNOB, gear lever, leather, Light Stone 1 1997 on.<br />

Beige<br />

UKJ100230CEP KNOB, gear lever, leather, Red 1 1997 on, Classic Leather Option.<br />

UKJ100230HDZ KNOB, gear lever, leather, Porcelain Green1 1997 on, Classic Leather Option.<br />

UKJ100230JCH KNOB, gear lever, leather, Prussian Blue 1 1997 on, Classic Leather Option.<br />

UKJ100410HDC KNOB, gear lever, leather, County Green 1 1998, Cooper Sports limited edition.<br />

UKJ100610PMA KNOB, gear lever, leather, Black 1 1998-99, Paul Smith, Mini 40 and<br />

John Cooper limited editions .<br />

2000, Seven, Knightsbridge and Cooper.<br />

UKJ100610SMK KNOB, gear lever, leather, Light Stone 1 1999, Mini 40.<br />

Beige<br />

8 UKJ100950MDC KNOB, gear lever, alloy 1 2000, Cooper Sport.<br />

9 22G1434 RETAINER, gear lever 1<br />

10 DAM2670 PIN, gear lever retaining, long 1<br />

11 22G2277 PIN, gear lever retaining, shor t 1<br />

12 DAM3670 HOUSING, gear lever 1 Includes gear lever retaining pins and<br />

lower bushes.<br />

13 42H1214 BUSH, housing,lower 2<br />

14 DAM8621 COVER, lower, housing 1<br />

15 22G2026 BRACKET, housing to mounting rubbers 1<br />

16 BT606281 BOLT, bracket to housing 1<br />

17 LNZ106 NUT, nyloc 1<br />

18 22G2205 MOUNTING , rubber 2<br />

19 FNZ105 NUT 2<br />

20 LWZ205 WASHER, locking 2<br />

21 22G2792 EXTENSION, gearchange rod 1<br />

22 42H1199 ROD, extension support 1<br />

23 22G1930 ROD, gear change 1 1973-92; not 1990 on, 1275.<br />

UKN10023 ROD, gear change 1 1990 on, 1275.<br />

24 42H1116 COUPLING, gear change rod to selector 1<br />

shaft<br />

25 RPS1416 ROLL PIN, rod and coupling securing 3<br />

26 AHU1672 OIL SEAL, selector shaft, in differential 1<br />

cover<br />

27 DAM7764 BUSH, selector shaft 1 1973-85 approx.; replace with SSK001<br />

selector oil seal kit.<br />

28 DAM8706 BUSH, aluminium, selector shaft 1 1985 approx. on (improved design).<br />

29 CDU1563 O RING , selector shaft 1 1985 approx. on (improved design).<br />

30 DAM3022 GAITER, selector shaft 1<br />

Selector shaft oil seal failure was always a problem on rod gearchange Minis (as any late-model Mini<br />

owner with oil drips on their garage floor will know). The most common remedy effected by owners in<br />

the past was to put two oil seals one behind the other on the selector shaft (there’s just enough space<br />

to do so), the outer one of the two acting both as a secondary seal and also as a secondary shield<br />

behind the gaiter, protecting the inner seal from under-body muck and grit. Most importantly, the<br />

second seal helped to support the selector shaft and hold it in alignment in the gearbox casing.<br />

Factory engineers finally came up with a remedy in 1985, fitting a modified selector shaft bush with a<br />

new O ring to improve the selector shaft alignment. Somerford Mini of course supply all these<br />

parts separately, but we’ve also put them together as an easy-to-buy, easy-to-fit kit for the<br />

owner to modify a pre-1985 Mini or repair a later model.<br />

31 SSK001 SELECTOR OIL SEAL KIT 1 Includes oil seal, gaiter and<br />

improved bush and O ring.<br />

32 22A1936 ROD, steady, gear lever housing 1 1973-85.<br />

DAM5067 ROD, steady, gear lever housing 1 1985-92, not 1990 on, 1275.<br />

UKN10032 ROD, steady, gear lever housing 1 1990 on, 1275.<br />

33 13H7286 BUSH, Metalastic, steady rod to gear case 1<br />

34 BT605161 BOLT, steady rod to bush 1<br />

35 LNZ505 NUT, nyloc, thin 1<br />

36 PWZ105 WASHER, plain 1<br />

37 LNZ508 NUT, nyloc, thin, steady rod to gear lever 1<br />

housing<br />

38 PWZ108 WASHER, plain 1<br />

39 GAE191 SWITCH, reversing lights 1<br />

40 22A1613 NUT, locking reversing light switch 1<br />

41 CZH4278 GAITER,gearlever 1 Use when leather gaiter not fitted.<br />

42 PAM5130 GAITER,gearlever, inner 1 Use when leather gaiter fitted.<br />

43 FJL10016 GAITER, outer, leather, black and red 1 When fitted.<br />

FJL100480JCH GAITER, outer, PVC, Prussian Blue 1 When fitted.<br />

FJL101210RKX GAITER, outer, PVC, Stone Beige/bright 1 Original fitment 1997 on.<br />

FJL101210WFEGAITER, outer, PVC, Grenadine Red/chrome 1 Original fitment 40th Anniversary.<br />

FJL101210WFGGAITER, outer, PVC, Prussian Blue/chrome 1 Original fitment 40th Anniversary.<br />

FJL101210CAC GAITER, outer, PVC, tartan red 1 Original fitment Classic 2000 Seven.<br />

The outer gaiter is also supplied in alternative colour and bright finisher styles to match the<br />

interior trim of other later 1990s models. Please contact Somerford Mini for details of availability.<br />

44 JPC6519 INSULATION, gearlever aperture 1 Use when leather gaiter fitted.<br />

45 FJN10003 PLATE, gearlever gaiter to floor 1<br />

46 PTZ1006 SCREW, plate to floor 4<br />

Between 1985 and 1992, Minis bound for Germany were equipped with a vacuum advance cut-out<br />

solenoid, operated by a switch on the gearchange. This naturally necessitated the use of several modified<br />

or new gearchange components. Only those that differ from standard are listed below:<br />

47 DAM8066 HOUSING, gear lever 1 1985-88; Germany, without brake servo.<br />

48 DAM6328 COVER, lower, housing 1 1985-88; Germany, without brake servo.<br />

49 DAM6143 BRACKET, gear lever housing 1 1985-88; Germany, without brake servo.<br />

50 SH604041 SCREW, bracket to housing 3 1985-88; Germany, without brake servo.<br />

51 LWZ404 WASHER, shakeproof 3 1985-88; Germany, without brake servo.<br />

52 DAM6049 ROD, extension suppor t 1 1985-88; Germany, without brake servo.<br />

53 DAM8618 HOUSING, gear lever 1 1988-92; Germany, with brake servo.<br />

54 DAM8623 COVER, lower, housing 1 1988-92; Germany, with brake servo.<br />

55 DAM8604 BRACKET, gear lever housing 1 1988-92; Germany, with brake servo.<br />

56 SH604041 SCREW, bracket to housing 5 1988-92; Germany, with brake servo.<br />

57 LWZ404 WASHER, shakeproof 5 1988-92; Germany, with brake servo.<br />

58 DAM8587 BODY, 4th gear switch 1 1988-92; Germany, with brake servo.<br />

59 DAM8592 SEAL, gear lever housing, front 1 1988-92; Germany, with brake servo.<br />

60 DAM8591 SEAL, gear lever housing, rear 1 1988-92; Germany, with brake servo.<br />

61 NY108041 NUT, nyloc 2 1988-92; Germany, with brake servo.<br />

62 DAM8588 WASHER, sealing, special 2 1988-92; Germany, with brake servo.<br />

63 DAM8599 ROD, gear change 1 1988-92; Germany, with brake servo.<br />

64 ADU5066 SWITCH, gearbox, 4th gear, solenoid valve 1<br />

operating<br />

Rod Gearchange Quickshift Kit<br />

Available as an easy-to-fit conversion for all rod change Minis, the quickshift drastically cuts the truck-lik e<br />

distance between gears , making gearchanges a fast, efficient pleasure instead of a work-out for your arm!<br />

Engineered with great integrity by Kent Auto Developments, the kit includes a new, chromed gear lever<br />

and bush, plus a revised retainer assembly.<br />

65 1013216 QUICKSHIFT KIT 1<br />

Accessory Gear Lever Knobs<br />

Accessory Mini gear lever knobs are available from Somerford Mini to spruce up your gear lever,<br />

providing a smart alternative to the often basic and frequently unavailable original knobs. Please order<br />

by selecting the relevant part number for leather, wood or burr walnut finish, and then quote in your<br />

order the insert badge you require; you can choose from the following:<br />

‘Mini’ (with side view of car)<br />

Mini winged logo<br />

‘Cooper’<br />

Mini Cooper laurel wreath<br />

‘GT’<br />

Union flag<br />

Chequered flags<br />

Skull and crossbones (hmm... nice!)<br />

66 BG2702 KNOB, gear lever, black leather 1<br />

67 BG2602 KNOB, gear lever, wood 1<br />

BWGK KNOB, gear lever, burr walnut 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

23


Automatic Transmission - Torque Converter and Housing<br />

© Copyright Somerford Mini Limited<br />

24<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


Automatic Transmission - Torque Converter and Housing<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Torque Converter Housing<br />

1 - TORQUE CONVERTER HOUSING ASS’Y 1 Non-ser viced part.<br />

2 22A1239 BEARING, idler gear (1.004" ext. dia.) 1 1965-68; fit with CCN216 circlip.<br />

13H7985 BEARING, idler gear (1 1/16" ext. dia., 1 1968-82 approx.; fit with 51K3565<br />

3/4" int. dia.) circlip.<br />

AHU1707 BEARING, idler gear (1 3/8" ext. dia., 1 1982 appro x. on (A Plus gears); fit<br />

7/8" int. dia.) without circlip.<br />

As happened with Mini manual gearboxes at similar dates, the idler gear shaft diameter (i.e. idler gear<br />

bearing internal diameter) and the bearing seat diameter in the torque converter housing (idler gear<br />

bearing external diameter) changed a couple of times. To be safe, measure the internal and exter nal<br />

diameters of your bearing before ordering. Note that the idler gear thrust washers, listed later on this<br />

page, also changed to 7/8” inter nal diameter when the AHU1707 bearing arrived around 1982.<br />

3 CCN216 CIRCLIP, bearing 1 1965-68.<br />

51K3565 CIRCLIP, bearing 1 1968-82.<br />

4 AAU1365 BEARING, input gear 1<br />

5 22A661 RETAINER, bearing 1<br />

6 22A784 OIL SEAL, primar y gear 1<br />

7 22A973 COVER, engine oil pump 1<br />

8 2K8161 PLUG, core, torque converter housing 1<br />

9 22A974 TUBE, dipstick 1 1965-96.<br />

LQN100830 TUBE, dipstick 1 1997 on (Japan).<br />

10 22A750 DIPSTICK ASSEMBLY 1 1965-85.<br />

11 DAM7599 DIPSTICK ASSEMBLY 1 1985-96.<br />

LQM100700 DIPSTICK ASSEMBLY 1 1997 on (Japan).<br />

12 AEC671 WASHER, rubber, dipstick 1 1965-85; included in 22A750 dipstick<br />

assembly.<br />

13 22A1084 PLUG, housing 1<br />

14 22A1898 DISTANCE PIECE, starter motor to housing 1 If required; 1970 approx. to 1985.<br />

15 GUG705684GM GASKET, housing to cylinder block and 1<br />

transmission case<br />

16 BH605161 BOLT, housing to cylinder block, short 3<br />

17 BH605181 BOLT, housing to cylinder block, long 2 1965-90.<br />

BH605201 BOLT, housing to cylinder block, long 2 1990 on.<br />

18 SH605071 SCREW, housing to cylinder block 2<br />

19 LWZ305 WASHER, locking 6<br />

20 12B63 WASHER, sealing 1<br />

For hardware used to attach the torque converter housing to the transmission case, please see<br />

the ‘Automatic Transmission - External’ section of the Somerford Mini Catalogue.<br />

Torque Converter<br />

21 22G1691 TORQUE CONVERTER ASSEMBLY 1 1965-70.<br />

DAM5085N TORQUE CONVERTER ASSEMBLY 1 1970-85; inertia starter.<br />

DAM7564N TORQUE CONVERTER ASSEMBLY 1 1985-94; pre-engaged starter, 998<br />

and 1275 carburetter models .<br />

TQB10007N TORQUE CONVERTER ASSEMBLY 1 1994-96; 1275 injection models.<br />

TQB100140N TORQUE CONVERTER ASSEMBLY 1 1997 on (Japan); 1275 injection<br />

models.<br />

The torque converter part numbers listed here are for new torque converter assemblies; reconditioned<br />

assemblies are also available from Somerford Mini, on request - please contact us for details.<br />

22 22G2613 RING GEAR, starter motor 1 Included in torque converter assembly;<br />

inertia star ter.<br />

DAM7518 RING GEAR, starter motor 1 Included in torque converter assembly;<br />

pre-engaged star ter.<br />

23 27H8800 PLUG, drain 2 Included in torque converter assembly.<br />

24 27H8803 WASHER, sealing 2 Included in torque converter assembly.<br />

25 27H8801 BOLT 6 Included in torque converter assembly.<br />

26 27H8804 LOCK TAB, torque converter bolt 3 Included in torque converter assembly.<br />

27 22A1158 SCREW, torque converter to crankshaft 1<br />

28 22A1155 LOCK TAB, screw 1<br />

29 22A1159 KEY, torque converter to crankshaft 1<br />

30 22G1022 COVER, torque converter 1 1965-70.<br />

22G1580 COVER, torque converter 1 1970-94; 998 and 1275 carburetter<br />

models.<br />

TGL10008 COVER, torque converter 1 1994 on; 1275 injection models.<br />

31 22A1114 PLUG, cover 1<br />

32 SH605081 SCREW, cover to torque converter housing 5<br />

33 LWZ305 WASHER, locking 5<br />

34 FNZ105 NUT 5<br />

35 TYG10007 BOLT, dowel, cover to torque converter 2 1994 on; 1275 injection models.<br />

housing<br />

36 22A1492 GROMMET, cover to torque converter 1 1970 on.<br />

housing<br />

Torque Converter Gear Train<br />

Note if you have a 1965 or early 1996 Mini Automatic that the output gear train is unique and is not<br />

itemised here. Factory advice for these models is to replace all three gears with those shown here,<br />

together with the relevant thrust washers and shims .<br />

If you are unsure that the age of your Mini’s transmission matches the age of the car, you will need to<br />

work out whether you have pre-A Plus or A Plus output gears. A Plus gears were introduced on the<br />

Mini round about 1982 (at different times on different models...), and have a sharper tooth angle and<br />

different pitch making them quieter than,but definitely not interchangeable with, the earlier gears. A<br />

Plus gears can be identified by the presence of a circumferential groove in the centre of the teeth.<br />

37 22A1064 PRIMARY GEAR ASS’Y, with bushes 1 1965-82 approx.<br />

DAM5713 PRIMARY GEAR ASS’Y, with bushes 1 1982 approx. to 1992; A Plus gears,<br />

998 models.<br />

DAM9374 PRIMARY GEAR ASS’Y, with bushes 1 1992 on; A Plus gears , 1275 models.<br />

38 22A1066 BUSH, primary gear, front 1 1965-92; 848 and 998 models.<br />

DAM8889 BUSH, primary gear, front 1 1992 on; 1275 models.<br />

39 22G109 BUSH, primary gear, rear 1 ‘Top hat’ bush.<br />

Once fitted, the primary gear bushes must be machined to ensure alignment with each other. Confusion<br />

often reigns over the convention for naming primary gear bushes. Which should be called the front bush<br />

and which should be the rear The answer is the bush closer to the front of the engine (i.e. the water<br />

pump end) is the front bush and the bush on the torque converter end (the ‘top hat’ bush) is the rear<br />

bush.<br />

40 22A321 WASHER, thrust, primary gear, front, 1 1965-92; 848 and 998 models.<br />

0.110-0.112" (2.79-2.84mm)<br />

22A322 WASHER, thrust, primary gear, front, 1 1965-92; 848 and 998 models.<br />

0.112-0.114" (2.84-2.89mm)<br />

22A323 WASHER, thrust, primary gear, front, 1 1965-92; 848 and 998 models.<br />

0.114-0.116" (2.89-2.94mm)<br />

22A324 WASHER, thrust, primary gear, front, 1 1965-92; 848 and 998 models.<br />

0.116-0.118" (2.94-2.99mm)<br />

22A450 WASHER, thrust, primary gear, front, 1 1965-92; 848 and 998 models.<br />

0.118-0.120" (2.99-3.04mm)<br />

DAM6490 WASHER, thrust, primary gear, front, 1 1992 on; 1275 models.<br />

0.112-0.114" (2.84-2.89mm)<br />

DAM6486 WASHER, thrust, primary gear, front, 1 1992 on; 1275 models.<br />

0.114-0.116" (2.89-2.94mm)<br />

DAM6487 WASHER, thrust, primary gear, front, 1 1992 on; 1275 models.<br />

0.116-0.118" (2.94-2.99mm)<br />

DAM6488 WASHER, thrust, primary gear, front, 1 1992 on; 1275 models.<br />

0.118-0.120" (2.99-3.04mm)<br />

DAM6489 WASHER, thrust, primary gear, front, 1 1992 on; 1275 models.<br />

0.120-0.122" (3.04-3.09mm)<br />

41 22A319 WASHER, thrust, primary gear, rear 1<br />

42 88G549 RING, backing 1<br />

43 22A1242 GEAR, idler, with 3/4" shaft dia. 1 1965-82 approx.<br />

DAM5165 GEAR, idler, with 7/8" shaft dia. 1 1982 approx. on; A Plus gears .<br />

44 22A1546 WASHER, thrust, idler gear 2 1965-82 approx. (3/4” int. dia.).<br />

0.130-0.131" (3.30-3.32mm)<br />

22A1545 WASHER, thrust, idler gear 2 1965-82 approx. (3/4” int. dia.).<br />

0.132-0.133" (3.35-3.37mm)<br />

22A1547 WASHER, thrust, idler gear 2 1965-82 approx. (3/4” int. dia.).<br />

0.134-0.135" (3.40-3.42mm)<br />

22A1548 WASHER, thrust, idler gear 2 1965-82 approx. (3/4” int. dia.).<br />

0.136-0.137" (3.45-3.47mm)<br />

22A1549 WASHER, thrust, idler gear 2 1965-82 approx. (3/4” int. dia.).<br />

0.138-0.139" (3.50-3.53mm)<br />

DAM4822 WASHER, thrust, idler gear 2 1982 approx. on, A Plus gears<br />

0.132-0.133" (3.35-3.37mm) (7/8” int. dia.).<br />

DAM4823 WASHER, thrust, idler gear 2 1982 approx. on, A Plus gears<br />

0.134-0.135" (3.40-3.42mm) (7/8” int. dia.).<br />

DAM4824 WASHER, thrust, idler gear 2 1982 approx. on, A Plus gears<br />

0.136-0.137" (3.45-3.47mm) (7/8” int. dia.).<br />

DAM4825 WASHER, thrust, idler gear 2 1982 approx. on, A Plus gears<br />

0.138-0.139" (3.50-3.53mm) (7/8” int. dia.).<br />

45 22A1265 GEAR, input 1 1965-82 approx.<br />

DAM5164 GEAR, input 1 1982 approx. on; A Plus gears .<br />

46 22A1266 SHIM, input gear, 0.003" (0.076mm) A/R<br />

22A1267 SHIM, input gear, 0.012" (0.305mm) A/R<br />

47 22A624 WASHER, abutment 1<br />

48 510618A NUT, nyloc, input gear 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

25


Automatic Transmission - Transmission <strong>Components</strong><br />

© Copyright Somerford Mini Limited<br />

26<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


Automatic Transmission - Transmission <strong>Components</strong><br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Rebuilt or Repaired Transmission Assemblies<br />

Somerford Mini does not offer a rebuild or repair service for automatic transmissions other than<br />

superficial repairs not involving the internal workings, because of the cost of the necessary<br />

specialist equipment and the relatively few numbers of customers for automatic transmission work.<br />

We advise customers requiring rebuilds or repairs to deal directly with an automatic transmission<br />

specialist - we can point you in the right direction, if required. We should also mention we carry<br />

out automatic to manual power unit transplants in our workshops - automatic engines are<br />

unique and will not fit a manual gearbox, so both engine and transmission are changed. This<br />

apparently drastic measure actually frequently represents a very cost-effective way to get your Mini<br />

back up and running when otherwise faced with huge bills for automatic transmission repair.<br />

We do not hold comprehensive stocks of automatic transmission internal components. Instead we<br />

limit ourselves to parts which by our own experience we consider may be fitted successfully by our<br />

customers - and even then, sometimes only by the more e xperienced. As always, though, if there’s<br />

anything else you require, please contact us and if it’s available we will obtain it for you.<br />

Differential Housing Attachment<br />

1 22A1012 GASKET, transmission case to housing, upper 1 1965-73; for ‘Hardy Spicer’ drive shafts .<br />

GUG705571GM GASKET, transmission case to housing, upper 1 1973 on; for ‘pot joint’ drive shafts.<br />

2 22A1011 GASKET, transmission case to housing, lower 1 1965-73; for ‘Hardy Spicer’ drive shafts .<br />

GUG705572GM GASKET, transmission case to housing, lower 1 1973 on; for ‘pot joint’ drive shafts.<br />

3 22A153 DOWEL,transmission case to housing 2<br />

4 22A691 PEG , oil seal housing 1<br />

5 22A1044 STUD, transmission case to housing 1<br />

6 22A1045 STUD, transmission case to housing 4<br />

7 22A1046 STUD, transmission case to housing 2<br />

8 22A1041 STUD, transmission case to housing 1<br />

9 22A1043 STUD, transmission case to housing 3<br />

10 FNZ506 NUT 4<br />

11 FNZ505 NUT 7<br />

12 LWZ305 WASHER, locking 7<br />

13 22A690 LOCK TAB, transmission case to housing, RH 1<br />

14 22A692 LOCK TAB, transmission case to housing, LH 1<br />

Torque Converter Housing Attachment<br />

15 22A1689 GASKET, transmission case to housing 1 1965-73; for ‘Hardy Spicer’ drive shafts .<br />

GUG705684GM GASKET, transmission case to housing 1 1973 on; for ‘pot joint’ drive shafts.<br />

16 22A97 DOWEL,transmission case to housing 2<br />

17 53K547 STUD, transmission case to housing, shor t 6<br />

18 22A963 STUD, transmission case to housing, long 4<br />

19 FNZ505 NUT 10/11 Qty. increases when screw not used.<br />

20 SH505101 SCREW, coarse thread, case to housing 1 If fitted.<br />

21 LWZ305 WASHER, locking 11<br />

22 BH505181 BOLT, coarse thread, case to housing 2 1985 on.<br />

For screws, bolts and washers used to attach the torque converter housing to the cylinder block, please<br />

see the ‘Automatic Transmission - Torque Converter’ section.<br />

Front Cover Attachment<br />

23 22A1487 FRONT COVER, transmission 1 1965-92; 848 and 998 models .<br />

24 22A1334 PIPE, valve block to front cover 1 Included in 22A1487 front cover.<br />

25 22A1557 O RING , pipe 1 Included in 22A1487 front cover.<br />

26 DAM5246 FRONT COVER, transmission 1 1992 on; 1275 models.<br />

27 22A1334 PIPE, valve block to front cover 1 Included in D AM5246 front cover.<br />

28 22A1557 O RING , pipe 1 Included in D AM5246 front cover.<br />

29 DAM4775 LEVER, bell crank 1 Included in D AM5246 front cover.<br />

30 DAM3967 PIN, pivot 1 Included in D AM5246 front cover.<br />

31 TYC100110 CIRCLIP, lever to pivot pin 1 Included in DAM5246 front cover.<br />

32 TGY10001 GUARD, inhibitor switch 1 1992 on; 1275 models.<br />

33 SF504041 SCREW, guard to front cover 1 1992 on; 1275 models.<br />

34 GUG705562GM GASKET, front cover to transmission case 1<br />

35 SH505091 SCREW, coarse thread, cover to case 15 1965-92; 848 and 998 models .<br />

36 LWZ205 WASHER, locking 15 1965-92; 848 and 998 models .<br />

37 DAM7754 SCREW, flanged, cover to case 15 1992 on; 1275 models.<br />

38 BH506221 BOLT, coarse thread, cover to case 2<br />

39 LWZ306 WASHER, locking 2<br />

40 GUG705552GM GASKET, oil filter head to front cover 1<br />

41 22A1001 O RING , oil filter head to front cover 2 If required.<br />

For the engine oil filter and filter head, please see the engine catalogue pages .<br />

Auxiliary Pump Cover Attachment<br />

42 88G498 GASKET, transmission case to co ver 1 1965-73; for ‘Hardy Spicer’ drive shafts .<br />

GUG705683GM GASKET, transmission case to co ver 1 1973 on; for ‘pot joint’ drive shafts.<br />

43 22A13 DOWEL,transmission case to co ver 2<br />

44 CHS2511 STUD, transmission case to cover,shor t 1<br />

45 CHS2512 STUD, transmission case to cover, medium 8<br />

46 CHS2516 STUD, transmission case to cover, long 2<br />

47 FNZ505 NUT 11<br />

48 LWZ305 WASHER, locking 11<br />

Speedometer Drive<br />

49 27H7715 HOUSING, speedometer drive 1 1965-92; 848 and 998 models .<br />

TJF10001 HOUSING, speedometer drive 1 1992 on; 1275 models.<br />

50 27H7714 GASKET, housing to auxiliar y pump cover 1<br />

51 27H7716 SCREW, housing to aux. pump cover 2<br />

52 LWZ504 WASHER, shakeproof 2<br />

53 22A1881 PINION, 17 teeth (off white nylon) 1 1965-82; 848/998 models with 10” wheels.<br />

DAM2905 PINION, 16 teeth (green nylon) 1 1982-84; 998 models with 10" wheels.<br />

TXD10006 PINION, 18 teeth (red nylon) 1 1984-92; 998 models with 12" wheels.<br />

TNB10003 PINION, 15 teeth (blue nylon) 1 1992 on; 1275 models with 12" wheels.<br />

54 2A3624 BUSH, steel, speedometer pinion 1<br />

55 DAM8488 BUSH, speedometer cable attachment 1<br />

56 2A3628 GASKET, bush 1<br />

57 SH504071 SCREW, coarse thread, bush to housing 1<br />

58 LWZ304 WASHER, locking 1<br />

59 22A862 PLATE, bush retaining 1<br />

60 27H7713 GEAR, drive, 5 teeth (not paint coded) 1 1965-92; 848 and 998 models.<br />

TNB10006 GEAR, drive, 7 teeth (not paint coded) 1 1992 on; 1275 models.<br />

Cylinder Block Attachment<br />

61 GUG106SS GASKET SET, transmission case to block 1 1965-96.<br />

GUG703049SG GASKET SET, transmission case to block 1 1997 on (Japan).<br />

62 AHU1959 SEAL, oil, front main bearing cap 1 ‘Half Moon’ seal.<br />

63 LUE10003 O RING, transmission case to block 1<br />

1965-92, 848 and 998 Models<br />

64 12H1824 DOWEL, transmission case to block 2<br />

65 FHS2409 STUD, transmission case to block,shor t 1<br />

FHS2412 STUD, transmission case to block, long 5<br />

66 FNZ504 NUT 6<br />

67 LWZ304 WASHER, locking 6<br />

68 SH604071 SCREW, transmission case to block 6<br />

69 LWZ304 WASHER, locking 6<br />

1992 On, 1275 Models<br />

70 22H983 DOWEL, transmission case to block 1<br />

71 FHS2409 STUD, transmission case to block,shor t 5<br />

FHS2412 STUD, transmission case to block, long 1<br />

72 FNZ504 NUT 6<br />

73 LWZ304 WASHER, locking 6<br />

74 SH604071 SCREW, transmission case to block 6<br />

75 LWZ304 WASHER, locking 6<br />

76 BH604141 BOLT, dowel 1<br />

77 12A1150 COLLAR, dowel bolt 1<br />

78 PWZ104 WASHER, plain 1<br />

79 FNZ104 NUT 1<br />

Transmission Fittings<br />

80 GEG805 GASKET SET, transmission, ‘Hardy Spicer’ type1 1965-73; includes all gaskets and seals .<br />

GUG708003TS GASKET SET,transmission, ‘pot joint’ type 1 1973-96; includes all gaskets and seals .<br />

GUG708015TS GASKET SET, transmission 1 1997 on (Japan);incl. all gaskets and seals.<br />

81 88G302 BEARING, idler gear, 1.004" ext. dia. 1 1965-68; fit with CCN216 circlip.<br />

13H7848 BEARING, idler gear, 1 1/16" ext. dia. 1 1968-82 approx.;fit with 51K3565 circlip.<br />

AHU1707 BEARING, idler gear, 1 3/8" ext. dia. 1 1982 approx.on (A Plus); fit without circlip.<br />

82 CCN216 CIRCLIP, bearing 1 1965-68.<br />

51K3565 CIRCLIP, bearing 1 1968-82.<br />

83 DAM7335 PLUG, drain, magnetic 1<br />

84 AED172 WASHER, sealing, drain plug 1<br />

85 22G1679 VALVE, low pressure 1 1965-82.<br />

DAM4738 VALVE, low pressure 1 1982-85.<br />

ADU6491 VALVE, low pressure 1 1985 on.<br />

BAU2303 REPAIR KIT, low pressure valve 1 1985 on.<br />

86 GUG705568GM GASKET, valve to torque converter housing 1<br />

87 SH504061 SCREW, coarse thread, valve to housing 5<br />

88 LWZ204 WASHER, locking 5<br />

89 22A1570 STRAINER, oil 1<br />

90 22A1565 SEAL, oil strainer to pick up pipe 1<br />

91 22A1171 PIPE, oil pick up 1 1965-73; for ‘Hardy Spicer’ drive shafts .<br />

DAM8344 PIPE, oil pick up 1 1973 on; for ‘pot joint’ drive shafts.<br />

92 LUE10003 O RING, pick up pipe 1<br />

93 22G792 PIPE, oil, valve block to adaptor 1<br />

94 AWN107 WASHER, curved, adaptor pipe 1<br />

95 22A1199 SEAL, oil, rubber 1<br />

96 LUE10003 O RING, oil pipe 1<br />

97 DAM9051 CONTROL ASSEMBLY, kickdown 1<br />

98 27H8422 E CLIP, kickdown control bolt 1 Included in kickdown control assembly.<br />

99 27H7738 CLIP, control rod 1 Included in kickdown control assembly.<br />

100 GUG705570GM GASKET, control to transmission case 1<br />

101 SH504061 SCREW, coarse thread, control to case 2<br />

102 LWZ304 WASHER, locking 2<br />

103 PWZ104 WASHER, plain 2<br />

104 22A975 ROD, valve operating 1 1965-71.<br />

22A1690 ROD, valve operating 1 1971-92; 848 and 998 models.<br />

DAM5226 ROD, valve operating 1 1992 on; 1275 models.<br />

105 22A978 SEAL, oil, operating rod 1 1965-71; fit with 22A977 retaining cup.<br />

13H6585 SEAL, oil, operating rod 1 1971 on; fit with DAM9317 retaining clip.<br />

106 22A977 CUP, seal and fork end gaiter retaining 1 1965-71.<br />

DAM9317 CLIP, seal retaining 1 1971 on.<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

27


Automatic Transmission - Gearchange Controls<br />

© Copyright Somerford Mini Limited<br />

28<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


Automatic Transmission - Gearchange Controls<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Automatic Transmission Controls<br />

1965-92, 850 and 1000<br />

1 22A1118 GEAR LEVER 1 1965-69.<br />

2 22A1077 KNOB, gear lever 1 1965-69.<br />

3 22A1575 GEAR LEVER 1 1969-82.<br />

DAM5777 GEAR LEVER 1 1982-92.<br />

4 22A1501 KNOB, gear lever 1 1969-92.<br />

5 53K1722 NUT, locking, gear lever knob 1 1969-92.<br />

6 22A1577 SLEEVE, gear lever, reverse baulk 1 1969-92.<br />

7 AHC197 SPRING , return, reverse baulk 1 1969-92.<br />

8 13H5837 CIRCLIP 1 1969-92.<br />

9 AHC196 WASHER, special 1 1969-92.<br />

10 54K1722 NUT, locking, reverse baulk sleeve 1 1969-92.<br />

11 22G461 HOUSING, gear selector 1<br />

12 PMZ412 SCREW, housing to floor 4 1965-73.<br />

13 22A2062 PLATE, housing mounting 1 1973-92.<br />

14 22A2067 GASKET, plate 1 1973-92.<br />

15 ANZ103 NUT, plate to floor 4 1973-92.<br />

16 WL700101 WASHER, locking 4 1973-92.<br />

17 22A1068 PIVOT, gear lever 1<br />

18 22A941 BUSH, sliding, pivot 1<br />

19 22A943 CIRCLIP, pivot 1<br />

20 22A1076 RETAINER, pivot 1<br />

21 PMZ306 SCREW, retainer 2<br />

22 WL700101 WASHER, locking 2<br />

23 ANZ103 NUT 2<br />

24 22A1117 PLATE, gear indicator 1 1965-69.<br />

22A1821 PLATE, gear indicator 1 1969-73.<br />

22A1883 PLATE, gear indicator 1 1973-92.<br />

25 RTP603 SCREW, self tapping, plate to control box 4<br />

26 22G1123 CONTROL BOX 1<br />

27 SH504051 SCREW, coarse thread, control box to 4<br />

housing<br />

28 LWZ204 WASHER, locking 4<br />

29 22A1075 SPRING , reverse gear abutment 1<br />

30 22A1028 PLUNGER, gear selector 1 1965-82.<br />

DAM5780 PLUNGER, gear selector 1 1982-92.<br />

31 22A2217 CABLE, gear selector 1<br />

32 22A1146 GAITER, cable, small 1<br />

33 22A1147 GAITER, cable, large 1<br />

34 FNZ103 NUT, cable, locking 1<br />

35 NT604041 NUT, cable, locking 1<br />

36 FNZ207 NUT, cable, locking 2<br />

37 PCR507 CLIP, selector cable 1 1965-69.<br />

38 CP105081 CLIP, selector cable 1 1969-92.<br />

39 22A1858 FERRULE, selector cable 1 1969-92.<br />

40 PTZ1004 SCREW, self tapping, clip 1<br />

41 WL700101 WASHER, locking 1<br />

42 DAM8711 SPACER, selector cable to subframe 1 1987-92.<br />

43 12A1358 BUSH, selector cable 2<br />

44 22A1188 DISTANCE TUBE,bush 1<br />

45 22A1195 WASHER, plain 2<br />

Forged Bell Crank Lever 1965-70<br />

46 88G456 LEVER, bell crank 1<br />

47 21A798 BUSH, bell crank lever 1 Included in lever.<br />

48 22A1160 PIVOT, lever 1<br />

49 22A995 WASHER, shakeproof 1<br />

50 22A1161 WASHER, plain 1<br />

51 LNZ205 NUT, nyloc 1<br />

52 22A989 FORK END, valve operating rod 1<br />

53 FNZ204 NUT, locking operating rod fork end 1<br />

54 22A999 FORK END, selector cable 1<br />

55 ANZ103 NUT, locking selector cable fork end 2<br />

56 WL700101 WASHER, locking 1<br />

57 22A1196 CLEVIS PIN, fork ends to lever 2<br />

58 PWZ104 WASHER, plain 2<br />

59 22A1164 GAITER, operating rod fork end 1<br />

60 22A1165 GAITER, selector cable fork end 1<br />

61 22A1284 GUARD, bell crank lever 1 1968-70.<br />

Exposed Pressed Bell Crank Lever 1970-71<br />

62 22A1697 LEVER, bell crank 1<br />

63 22A1807 PIVOT, lever 1<br />

64 LWZ204 WASHER, locking 1<br />

65 FNZ104 NUT 1<br />

66 22A1703 BRACKET, valve operating rod to lever 1<br />

67 FNZ104 NUT 1<br />

68 LWZ204 WASHER, locking 1<br />

69 BH604111 BOLT, bracket to lever 1<br />

70 LWZ204 WASHER, locking 1<br />

71 22A1808 COLLAR, spacing bracket 1<br />

72 22A1695 FORK END, selector cable 1<br />

73 ANZ103 NUT, locking selector cable fork end 2<br />

74 WL700101 WASHER, locking 1<br />

75 SH604081 SCREW, fork end to lever 1<br />

76 LWZ204 WASHER, locking 1<br />

77 FNZ504 NUT 1<br />

Enclosed Pressed Bell Crank Lever 1971-92<br />

78 22A1697 LEVER, bell crank 1<br />

79 BH504131 BOLT, coarse thread, lever pivot 1<br />

80 LWZ204 WASHER, locking 1<br />

81 22A1702 COLLAR, spacing pivot bolt 1<br />

82 22A1703 BRACKET, valve operating rod to lever 1<br />

83 FNZ104 NUT 1<br />

84 LWZ204 WASHER, locking 1<br />

85 BH604111 BOLT, bracket to lever 1<br />

86 LWZ204 WASHER, locking 1<br />

87 22A1695 FORK END, selector cable 1<br />

88 ANZ103 NUT, locking selector cable fork end 2<br />

89 WL700101 WASHER, locking 1<br />

90 SH604081 SCREW, fork end to lever 1<br />

91 LWZ204 WASHER, locking 1<br />

92 FNZ504 NUT 1<br />

93 22A1704 COVER, linkage 1<br />

94 SH505091 SCREW, coarse thread, cover securing 2<br />

95 2K2545 WASHER, locking 2<br />

96 PWZ105 WASHER, plain 2<br />

97 13H4007 SWITCH, gearbox, starter inhibitor and 1 1965.<br />

reverse lights<br />

13H5045 SWITCH, gearbox, starter inhibitor 1 1966-92.<br />

98 GAE191 SWITCH, reversing lights 1 1966-92.<br />

99 22A1613 NUT, locking reversing light switch 1 1966-92.<br />

Automatic Transmission Controls<br />

1992 On, 1275<br />

100 DAM7535 KNOB, gear lever 1<br />

101 UCB10031 GEAR SELECTOR ASSEMBLY 1<br />

102 UCV10022 CABLE, gear selector 1 Included in selector assembly.<br />

103 NH105041 NUT, selector assembly to floor 4<br />

104 WE105001 WASHER, locking 4<br />

105 UCJ10022PMA COVER, selector assembly, black 1<br />

DAM2319 CLIP, cover to selector assembly 4<br />

106 DAM4551 GEAR INDICATOR ASSEMBLY, illuminated 1<br />

107 DAM4360 WINDOW, gear indicator 1<br />

108 GLB504 BULB, gear indicator illumination 1<br />

109 UCD10033 LEVER, bell crank 1<br />

110 DAM5227 PIVOT, lever 1<br />

111 ADU5500 CIRCLIP, lever to pivot 1<br />

112 UEM10002 TRUNNION, selector cable to lever 1<br />

113 SH105101P SCREW, cable clamping 1<br />

114 DAM8362 BOBBIN, valve operating rod 1<br />

115 FNZ104 NUT 1<br />

116 LNZ204 NUT, nyloc 1<br />

117 22A1704 COVER, linkage 1<br />

118 SH505091 SCREW, coarse thread, cover securing 2<br />

119 2K2545 WASHER, locking 2<br />

120 PWZ105 WASHER, plain 2<br />

121 ADU5066 SWITCH, gearbox, starter inhibitor 1<br />

122 TGY10001 GUARD, inhibitor switch 1<br />

123 SF504041 SCREW, guard to front cover 1<br />

124 GAE191 SWITCH, reversing lights 1<br />

125 22A1613 NUT, locking reversing light switch 1<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

29


Final Drive (Differential)<br />

© Copyright Somerford Mini Limited<br />

30<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk


Final Drive (Differential)<br />

No. Part No. Description Qty. Remarks No. Part No. Description Qty. Remarks<br />

Final Drive Assembly<br />

You will need to establish several things before embarking on a rebuild of your final drive:<br />

The first thing (and the easiest) is to work out which drive shafts your Mini has. Rubber coupling (or<br />

‘Moulton’) drive shafts were used on most Minis up until 1973. The exceptions were the Cooper S and<br />

automatic transmission models, which used universal joint (or ‘Hardy Spicer’) drive shafts up until that<br />

date. From 1973 onwards, all Minis used offset sphere (or ‘pot joint’) drive shafts. The designs of the<br />

final drive output shafts and their covers depend on the drive shafts fitted. While rebuilding a final<br />

drive on a rubber coupling Mini, you can easily convert it to take ‘pot joint’ drive shafts if you wish by<br />

fitting a pair of DAM3114 output shafts and 22G2688 circlips .<br />

The final drive gear also needs to be identified. This may be achieved by counting the number of teeth<br />

on the final drive gear and if you divide that number by the number of teeth on the corresponding<br />

final drive pinion in the gearbox, you’ll get the final drive ratio. If you are unsure whether the age of<br />

your Mini’s transmission matches the age of the car,you will also need to work out whether you have<br />

pre-A Plus or A Plus gears. A Plus gears were introduced on the Mini round about 1982 (at different<br />

times on different models...), and have a sharper tooth angle and different pitch making them quieter<br />

than, but definitely not interchangeable with, the earlier gears. Looking in the gearbox, A Plus gears can<br />

be identified by the presence of a circumferential groove in the centre of the teeth, and the final drive<br />

pinion on the gearbox mainshaft is machined flush on both sides .<br />

The only exception to this rule concerns cars with the 3.444:1 final drive ratio, which received A Plus<br />

final drive gears in 1979, a full 3 years before they got A Plus gearboxes. So, if you have a 3.444:1<br />

final drive Mini with a pre-A Plus gearbox containing the larger idler gear and 1st/3rd motion shaft<br />

bearings introduced in 1979, the chances are you will have A Plus final drive gears.<br />

Lastly, you will need to identify your differential case. The case was redesigned in the early 1980s to<br />

combat the problem of spinning pinion thrust washers wearing through it: notches were added to the<br />

case to locate anti-rotation tabs on redesigned thrust washers.<br />

For those indulging in modified or competition Minis, several flavours of limited slip differential and a<br />

stronger cross pin differential are available as special orders; please contact Somerford Mini to<br />

discuss your needs.<br />

1 BTA145 CASE, differential 1 Use with plain pinion thrust washers.<br />

DAM6027 CASE, differential 1 Use with anti-rotation thrust washers.<br />

2 ATA7378 BUSH, differential case 1 Included in differential case.<br />

Final Drive Gears, <strong>Manual</strong> <strong>Gearbox</strong><br />

3 22G443 GEAR, final drive, 65 teeth, 4.333:1 ratio 1 For 15 tooth 22G99 pinion.<br />

22G370 GEAR, final drive, 64 teeth, 4.267:1 ratio 1 For 15 tooth 22G99 pinion.<br />

22G101 GEAR, final drive, 62 teeth, 4.133:1 ratio 1 For 15 tooth 22G99 pinion.<br />

22G340 GEAR, final drive, 63 teeth, 3.938:1 ratio 1 For 16 tooth 22G338 pinion.<br />

22A401 GEAR, final drive, 64 teeth, 3.765:1 ratio 1 For 17 tooth 22A399 pinion.<br />

22G940 GEAR, final drive, 62 teeth, 3.647:1 ratio 1 For 17 tooth 22A399 pinion.<br />

22A411 GEAR, final drive, 62 teeth, 3.444:1 ratio 1 For 18 tooth 22A413 pinion.<br />

DAM3645 GEAR, final drive, 65 teeth, 4.333:1 ratio 1 For 15 tooth DAM3647 pinion; A Plus.<br />

DAM3216 GEAR, final drive, 63 teeth, 3.938:1 ratio 1 For 16 tooth DAM3218 pinion; A Plus.<br />

DAM4779 GEAR, final drive, 64 teeth, 3.765:1 ratio 1 For 17 tooth DAM4131 pinion; A Plus.<br />

DAM4162 GEAR, final drive, 62 teeth, 3.647:1 ratio 1 For 17 tooth DAM4131 pinion; A Plus.<br />

DAM2677 GEAR, final drive, 62 teeth, 3.444:1 ratio 1 For 18 tooth DAM2679 pinion; A Plus.<br />

DAM2806 GEAR, final drive, 61 teeth, 3.211:1 ratio 1 For 19 tooth DAM2808 pinion; A Plus.<br />

DAM6327 GEAR, final drive, 59 teeth, 3.105:1 ratio 1 For 19 tooth DAM2808 pinion; A Plus.<br />

DAM5925 GEAR, final drive, 59 teeth, 2.950:1 ratio 1 For 20 tooth DAM5927 pinion; A Plus.<br />

TCB10004 GEAR, final drive, 58 teeth, 2.762:1 ratio 1 For 21 tooth TCC10001 pinion; A Plus.<br />

Final Drive Gears, Automatic Transmission<br />

22A1003 GEAR, final drive, 72 teeth, 3.273:1 ratio 1 For 22 tooth 22A1300 pinion.<br />

DAM7362 GEAR, final drive, 72 teeth, 3.273:1 ratio 1 For 22 tooth DAM7365 pinion; A Plus.<br />

DAM4130 GEAR, final drive, 69 teeth, 2.760:1 ratio 1 For 25 tooth DAM4128 pinion; A Plus.<br />

4 ATA7378 BUSH, final drive gear 1 Included in final drive gear.<br />

5 ATA7043 BOLT, gear to differential case 6<br />

6 ATA7385 LOCK TAB, bolt 3<br />

7 BTA154 BLOCK, thrust 1 Optional in D AM6027 differential case.<br />

8 DAM6624 PINION, differential 2<br />

9 2A7062 WASHER, pinion thrust, plain 2 Use in BTA145 differential case.<br />

10 DAM5071 WASHER, pinion thrust, with anti-rotation 2 Use in DAM6027 differential case.<br />

tab<br />

11 22G2583 CROSS PIN, pinion 1<br />

12 RPS1418 ROLL PIN, cross pin 1<br />

13 22A373 OUTPUT SHAFT AND GEAR 2 For rubber (‘Moulton’) couplings .<br />

22A1151 OUTPUT SHAFT AND GEAR 2 For universal joints (‘Hardy Spicer’).<br />

DAM3114 OUTPUT SHAFT AND GEAR 2 For offset spheres (‘pot joints’).<br />

14 BTA101 WASHER, output gear thrust 2<br />

15 AHU1856 BEARING, differential 2<br />

16 2A3535 SHIM, bearing, 0.002" (0.0508mm) A/R<br />

2A3534 SHIM, bearing, 0.003" (0.0762mm) A/R<br />

DAM3108 SHIM, bearing, 0.006" (0.1520mm) A/R<br />

DAM3109 SHIM, bearing, 0.010" (0.2540mm) A/R<br />

DAM3633 SHIM, bearing, 0.020" (0.5080mm) A/R<br />

17 88G477 DISTANCE PIECE, with bush 1 Automatic transmission models; for<br />

universal joint (‘Hardy Spicer’) shafts.<br />

CHM166 DISTANCE PIECE, with bush 1 Automatic transmission models; for<br />

offset sphere (‘pot joint’) drive shafts.<br />

18 22G421 BUSH, distance piece 1 Automatic transmission models; for<br />

universal joint (‘Hardy Spicer’) shafts.<br />

2A3538 BUSH, distance piece 1 Automatic transmission models; for<br />

offset sphere (‘pot joint’) drive shafts.<br />

Final Drive Output<br />

Rubber Coupling (‘Moulton’) Type<br />

All <strong>Manual</strong> <strong>Gearbox</strong> Models Except Cooper S, 1959-73<br />

19 CHM85 COVER ASSEMBLY, with bush 2<br />

20 2A3538 BUSH, cover 2<br />

21 ADU5738 OIL SEAL, cover 2<br />

22 GUG705567GM GASKET, cover 2<br />

23 SH505101 SCREW, coarse thread, cover to gearbox 10<br />

24 LWZ305 WASHER, locking 10<br />

25 22A374 FLANGE, output 2<br />

26 FNZ810 NUT, output flange to shaft 2<br />

27 PWZ110 WASHER, plain 2<br />

28 GCD101 RUBBER COUPLING KIT, drive shaft 2 Includes one coupling, U bolts and nuts.<br />

QL5000 NYLON COUPLING KIT, drive shafts 1 Uprated; includes two nylon and needle<br />

roller couplings, plus U bolts and nuts.<br />

29 22A132 U BOLT, coupling to shaft yokes 8<br />

30 LNZ205 NUT, locking 16<br />

Universal Joint (‘Har dy Spicer’) Type<br />

Cooper S, 1963-71; All Automatic Transmission Models, 1965-73<br />

31 22G419 COVER ASSEMBLY, with bush 2 Cooper S.<br />

32 22G421 BUSH, cover 2 Cooper S.<br />

33 AHU1082 OIL SEAL, cover 2 Cooper S.<br />

34 GUG705567GM GASKET, cover 2 Cooper S.<br />

35 SH505101 SCREW, coarse thread, cover to gearbox 10 Cooper S.<br />

36 LWZ305 WASHER, locking 10 Cooper S.<br />

37 88G476 COVER ASSEMBLY, with bush 2 Automatic transmission models .<br />

38 22G421 BUSH, cover 2 Automatic transmission models .<br />

39 AHU1082 OIL SEAL, cover 2 Automatic transmission models .<br />

40 22A1612B GASKET, cover 2 Automatic transmission models .<br />

41 SH505081 SCREW, coarse thread, cover to gearbox 8 Automatic transmission models .<br />

42 LWZ305 WASHER, locking 8 Automatic transmission models .<br />

43 22A1152 FLANGE, output, with bolts 2<br />

44 22A1139 BOLT, output flange to drive shaft 8<br />

45 LNZ405 NUT, locking, output flange bolt 8<br />

46 22A1104 SCREW, output flange to output shaft 2<br />

47 WE600101 WASHER, shakeproof 2<br />

48 22A1201 WASHER, plain 2<br />

49 88G493 COLLET, output flange 4<br />

50 22A1566 RING, sealing 2<br />

Offset Sphere (‘Pot Joint’) Type<br />

All Models, 1973 On<br />

51 CHM85 COVER ASSEMBLY, with bush 2 <strong>Manual</strong> gearbox models.<br />

52 2A3538 BUSH, cover 2 <strong>Manual</strong> gearbox models.<br />

53 ADU5738 OIL SEAL, cover 2 <strong>Manual</strong> gearbox models.<br />

54 GUG705567GM GASKET, cover 2 <strong>Manual</strong> gearbox models.<br />

55 SH505101 SCREW, coarse thread, cover to gearbox 10 <strong>Manual</strong> gearbox models.<br />

56 LWZ305 WASHER, locking 10 <strong>Manual</strong> gearbox models.<br />

57 CHM167 COVER ASSEMBLY, with bush 2 Automatic transmission models .<br />

58 2A3538 BUSH, cover 2 Automatic transmission models .<br />

59 ADU5738 OIL SEAL, cover 2 Automatic transmission models .<br />

60 22A1612B GASKET, cover 2 Automatic transmission models .<br />

61 SH505081 SCREW, coarse thread, cover to gearbox 8 Automatic transmission models .<br />

62 LWZ305 WASHER, locking 8 Automatic transmission models .<br />

63 22G2688 CIRCLIP, output shaft 2<br />

64 GCV1102 OFFSET SPHERE C.V. JOINT ASS’Y 2 ‘Pot’ joint.<br />

65 GSV1073 GAITER KIT, offset sphere joint 2 Includes one gaiter, clips and grease.<br />

66 AKF1457 GREASE, sachet, offset sphere joint A/R<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk<br />

31


Brief Mini Production History<br />

This list is intended to assist some owners who are trying to establish year and model of their Mini.<br />

However, while the list may seem comprehensive, it isn’t. Just like everything else to do with the Mini<br />

when you look at its 40 year history, to come up with every last derivative, complete with corresponding<br />

chassis number (or vehicle identification number) prefix, would take several pages! However, limited<br />

editions excepted, it details the Mini models covered by this catalogue and is a fair representation of<br />

models down through the years.<br />

It does not cover models specific to certain markets that were locally assembled (e.g. Innocenti, Authi,<br />

Cord and Belgium, South Africa and Australia assembled vehicles). It also does not include certain shortlived<br />

niche models like the ERA Mini Turbo.<br />

Note that earlier MkI export models were often badged ‘850’rather than ‘Mini’ or ‘Seven’, and that the<br />

later 1980s/1990s City models were usually known in Europe as Special and in Japan as Sprite.<br />

Model Years Chassis No./ Commencing<br />

Built VIN Prefix Chassis No./VIN<br />

Austin and Morris Mk I Saloons 1959-67<br />

Austin Seven (850) 1959-62 A-A2S7 101<br />

Austin Mini (850) 1962-67 A-A2S7 197201<br />

Austin Seven De Luxe (850) 1959-62 A-A2S7 101<br />

Austin Mini De Luxe (850) 1962 A-A2S7 197021<br />

Austin Super Seven (850) 1961-62 A-A2S7S 125538<br />

Austin Super Mini (850) 1962 A-A2S7S 197021<br />

Austin Mini Super De Luxe (850) 1962-64 A-A2S7S 307125<br />

Austin Mini De Luxe (850) 1964-67 A-A2S7 640203<br />

Austin Seven/Mini Cooper (997) 1961-64 C-A2S7 138301<br />

Austin Mini Cooper (998) 1963-67 C-A2S7 486096<br />

Austin Mini Cooper S (1071) 1963-64 C-A2S7 384101<br />

Austin Mini Cooper S (1275) 1964-67 C-A2S7 551501<br />

Austin Mini Cooper S (970) 1964-65 C-A2S7 549501<br />

Morris Mini Minor (850) 1959-67 M-A2S4 101<br />

Morris Mini Minor De Luxe (850) 1959-62 M-A2S4 101<br />

Morris Super Mini Minor (850) 1961-62 M-A2S4S 75573<br />

Morris Mini Minor Super De Luxe (850) 1962-64 M-A2S4S 148817<br />

Morris Mini Minor De Luxe (850) 1964-67 M-A2S4 296257<br />

Morris Mini Cooper (997) 1961-64 K-A2S4 138311<br />

Morris Mini Cooper (998) 1963-67 K-A2S4 491251<br />

Morris Mini Cooper S (1071) 1963-64 K-A2S4 384101<br />

Morris Mini Cooper S (1275) 1964-67 K-A2S4 552501<br />

Morris Mini Cooper S (970) 1964-65 K-A2S4 550501<br />

Austin and Morris Mk II Saloons 1967-70<br />

Austin Mini Mk II 850 1967-69 A-A2SB 1068001<br />

Austin Mini Mk II 850 Super De Luxe 1967-69 A-A2SB 1068001<br />

Austin Mini Mk II 1000 Super De Luxe 1967-69 A-A2SB 1068001<br />

Austin Mini Cooper Mk II (998) 1967-69 C-A2SB 1068151<br />

Austin Mini Cooper S Mk II (1275) 1967-70 C-A2SB 1068451<br />

Morris Mini Mk II 850 1967-69 M-A2S6 507001<br />

Morris Mini Mk II 850 Super De Luxe 1967-69 M-A2S6 507001<br />

Morris Mini Mk II 1000 Super De Luxe 1967-69 M-A2S6 507001<br />

Morris Mini Cooper Mk II (998) 1967-69 K-A2S6 1068197<br />

Morris Mini Cooper S Mk II (1275) 1967-70 K-A2S6 1068471<br />

Mini Mk III Saloons 1969-75<br />

Mini 850 1969-74 X-A2S1 101<br />

Mini 850 1974-75 X-K2S1 101<br />

Mini 1000 1969-74 X-A2S1N 101<br />

Mini 1000 1974-75 X-L2S1N 101<br />

Mini Cooper S Mk III (1275) 1970-71 X-AD1 101<br />

Mini Saloons 1976-96 (‘Mk IV’ and Throttle Body Injection or TBi)<br />

Mini 850 1976-79 X-K2S1 340101<br />

Mini City (850) 1979-80 X-K2S1 633177<br />

Mini 850 Super De Luxe 1979-80 X-K2S1N 635039<br />

Mini 1000 1976-79 X-L2S1N 340554<br />

Mini 1000 Super 1979-80 X-L2S1N 633285<br />

Mini City (1000) 1980-82 X-L2S1O 743114<br />

Mini City E (1000) 1982-88 X-L2S1O 122249<br />

Mini City (1000) Non Catalyst 1988-92 X-L2S1O 396449<br />

Mini City (1000) Catalyst 1989-92 X-L2S3O 426565<br />

Mini HL (1000) 1980-82 X-L2S1N 743004<br />

Mini HLE (1000) 1982 X-L2S1N 122249<br />

Mini Mayfair (1000) 1982-88 X-L2S1N 147144<br />

Mini Mayfair (1000) Non Catalyst 1988-92 X-L2S1N 396449<br />

Mini Mayfair (1000) Catalyst 1989-92 X-L2S3N 426565<br />

32<br />

Model Years Chassis No./ Commencing<br />

Built VIN Prefix Chassis No./VIN<br />

Mini Mayfair (1000) Europe Non Catalyst 1988-92 X-L2S1S 396449<br />

Mini Mayfair (1000) Europe Catalyst 1989-92 X-L2S3S 426565<br />

Mini Sprite (1275) 1992-94 XN-YA 049349<br />

Mini Sprite 1.3i (1275) 1994-96 XN-YA 058254<br />

Mini Mayfair (1275) 1992-94 XN-WA 049349<br />

Mini Mayfair 1.3i (1275) 1994-96 XN-WA 058254<br />

Mini Cooper (1275) RSP Limited Edition 1990 XN-CA 010001<br />

Mini Cooper (1275) 1990-91 XN-CA 011651<br />

Mini Cooper 1.3i (1275) 1991-96 XN-CA 031550<br />

Mini Saloons 1997 On (Multi Point Injection or MPi, plus TBi)<br />

Mini (1275) MPi 1997-2000 XN-WA 134455<br />

Mini (1275) TBi Japan 1997-1999 XN-WA 134455<br />

Mini Cooper (1275) MPi 1997-2000 XN-CA 134455<br />

Mini Cooper (1275) TBi Japan 1997-1999 XN-CA 134455<br />

Riley and Wolseley Saloons 1961-69<br />

Riley Elf (850) 1961-63 R-A2S1 156851<br />

Riley Elf Mk II (1000) 1963-66 R-A2S2 369601<br />

Riley Elf Mk III (1000) 1966-69 R-A2S3 930221<br />

Wolseley Hornet (850) 1961-63 W-A2S1 156861<br />

Wolseley Hornet Mk II (1000) 1963-66 W-A2S2 367151<br />

Wolseley Hornet Mk III (1000) 1966-69 W-A2S3 927473<br />

Mini Clubman Saloons 1969-80<br />

Mini Clubman (1000) 1969-74 X-A2S2 101<br />

Mini Clubman (1000) 1974-75 X-L2S2 101<br />

Mini Clubman (1100) 1975-80 X-C2S2 258877<br />

Mini Clubman (1000 Automatic) 1975-80 X-L2S2 258877<br />

Mini 1275 GT 1969-74 X-AD2 101<br />

Mini 1275 GT 1974-80 X-E2D2 101<br />

Mini Cabriolets 1991-96<br />

Mini Cabriolet (Lamm Design) 1991-93 XN-WB 024857<br />

Mini Cabriolet (Rover) 1993-96 XN-WB 061481<br />

Austin and Morris Mk I Estates 1960-67<br />

Austin Seven Countryman (850) 1960-62 A-AW7 19126<br />

Austin Mini Countryman (850) 1962-67 A-AW7 197104<br />

Morris Mini Minor Traveller (850) 1960-67 M-AW4 19101<br />

Austin and Morris Mk II Estates 1967-69<br />

Austin Mini Countryman Mk II 1000 1967-69 A-AWB 1068101<br />

Morris Mini Traveller Mk II 1000 1967-69 M-AW6 1068401<br />

Mini Clubman and HL Estates 1969-82<br />

Mini Clubman Estate (1000) 1969-74 X-A2W2 101<br />

Mini Clubman Estate (1000) 1974-75 X-L2W2 101<br />

Mini Clubman Estate (1100) 1975-80 X-C2W2 259639<br />

Mini Clubman Estate (1000 Automatic) 1975-80 X-L2W2 259639<br />

Mini HL Estate (1000) 1980-82 X-L2W2 751080<br />

Mini Vans 1960-84<br />

Austin Seven/Mini Van (850) 1960-69 A-AV7 12101<br />

Austin Mini Van (1000) 1967-69 A-AV7 1068001<br />

Morris Mini Van (850) 1960-69 M-AV4 12601<br />

Morris Mini Van (1000) 1967-69 M-AV4 1068001<br />

Mini Van (850 and 1000) 1969-74 X-AV1 101<br />

Mini Van (850) 1974-79 X-KV1 101<br />

Mini Van (1000) 1974-79 X-LV1 101<br />

Mini 95 Van (850) 1979-84 X-KV1 126932<br />

Mini 95 Van (1000) 1979-84 X-LV1 126932<br />

Mini Pick Ups 1961-83<br />

Austin Seven/Mini Pick Up (850) 1961-69 A-AU7 87551<br />

Austin Mini Pick Up (1000) 1967-69 A-AU7 1068001<br />

Morris Mini Pick Up (850) 1961-69 M-AU4 91551<br />

Morris Mini Pick Up (1000) 1967-69 M-AU4 1068001<br />

Mini Pick Up (850 and 1000) 1969-74 X-AU1 101<br />

Mini Pick Up (850) 1974-79 X-KU1 101<br />

Mini Pick Up (1000) 1974-79 X-LU1 101<br />

Mini 95 Pick Up (850) 1979-80 X-KU1 25448<br />

Mini 95 Pick Up (1000) 1979-83 X-LU1 25448<br />

Tel. 01249 721421 Fax. 01249 721316 www.somerford-mini.co.uk

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