1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

9 - 18 OVERDRIVE
5. Remove the four bolts attaching the overdrive housing
to transmission and overdrive adaptor.
6. Slide the overdrive housing rearward carefully. Lightly
tap the end of the overdrive mainshaft with a rawhide
mallet to prevent the mainshaft from coming off with
the overdrive housing and spilling the free wheeling
rollers.
7. After the overdrive housing is removed, perform operations
1 thru 10 under "Removal of Parts From Rear of
Adaptor", Page 10, also "Disassembly of Housing",
Page 12, "Cleaning and Inspection", Page 12,
"Bearings", Page 12, "Gears, Control Shaft and Seal,
Overdrive Mainshaft Oil Seal and Overdrive Shift
Rail", Page 12.
NOTE: The countershaft and idler gear shaft lock plate
cannot be removed without removing the overdrive adaptor.
To remove the adaptor it is necessary to remove the
main drive gear bearing in order to remove the mainshaft
and adaptor without lowering the cluster gear assembly.
8. Drive the main drive gear bearing loose from the case
sufficiently to use a puller on the bearing snap ring and
pull the bearing from the main drive gear and transmission
case.
9. Remove the bolt from the adaptor plate and tip the
mainshaft upward and to the right to remove the second
and high shift fork and the low and reverse shift shoe.
10. Remove the complete transmission main-shaft assembly
with the overdrive adaptor from the transmission
case as an assembly.
11. Remove the main shaft lock ring from front end of
mainshaft.
NOTE: With a small, pointed, brush, paint a fine line
across the synchronizer rings, sleeve and the second and
high gears to facilitate proper assembly of these parts in
reassembly.
12. Remove the synchronizer shift sleeve and hub assembly,
intermediate gear and low and reverse gear from mainshaft.
13. Remove the large snap ring from the adaptor plate at the
mainshaft rear bearing and pull the adaptor plate off the
bearing.
14. Remove the oil slinger from the adaptor plate.
15. Remove the small snap ring and using a suitable arbor
press, remove the rear bearing from the mainshaft.
16. Using a brass drift, move the countershaft rearward just
enough to free up the lock plate in the shaft groove at the
rear end.
17. Make a dummy steel countershaft, 3/4" diameter exactly
7-5/64" long with a 3/16" hole drilled 1" deep at
each end. The purpose of the dummy shaft is to retain the
needle rollers, sleeve and thrust washers in position when
removing or Installing the countershaft gear cluster.
18. Place end of dummy shaft against the front end of the
countershaft, carefully drive the countershaft rearward
out of the transmission case.
CAUTION: Be sure the dummy shaft remains in constant
contact with the countershaft during this operation otherwise
the thrust washers, needle rollers and spacer with fall
out of place.
19. Use a long brass drift and drive the reverse idler gear shaft
out of rear of transmission case and remove the idler gear.
20. With dummy shaft holding needle rollers and thrust
washers in position, lift countershaft gear cluster straight
up and out of transmission case.
NOTE: Remove the thrust washers noting position to
insure exact replacement.
21. Drive out taper pins securing the transmission shift shafts
(small end of taper pin is down).
22. Remove nuts, washers and levers from shift shafts and
take shafts out of case. When doing this, also remove the
interlock sleeve, detent balls, spring and pin, Figure 27.