Volvo Maintenance Hints for 7xx/9xx - Bill Garland's Nuclear ...

smaller nut. The big nut is actually not a nut at all. It is a threaded flange
with hex sides. It does not turn. If it turns, you have ruined the pan. I
place a relatively large crescent wrench (open end adjustable wrench) on
the filler tube "flange nut," with the end of the wrench pointed toward the
rear of the car. If you orient the wrench jaws correctly, you can brace its
handle on the flange of the transmission pan (the flange where the gasket
is located). It' a tight fit, but it works. I then use a smaller crescent wrench
to turn the small nut ccw. The first wrench prevents excessive torque from Using a Block and Jack to Help Remove the Fill Tube Nut
being applied to the filler tube flange where it enters pan. I sometimes
need to use a breaker bar (steel pipe with one end flattened to fit over the
wrench handle) with the small wrench to generate some extra torque.
● Use heat from a hot air gun or a torch (flammable! caution!) if needed.
● See the photo for a tip from Tom F. to gain more leverage. "To remove
the filler tube, I wedged a 4X4 betwixt a crescent wrench and the frame
then used a small jack to encourage the filler tube nut to turn. It fought
back all the way. The last three turns took two of us pulling the wrench
using a bar through the combination wrench’s closed end."
● If you cannot remove the nut without destroying either nut or pan, you can still pull the pan with the tube installed by removing the
two starter bolts that hold the fill tube. It is not essential to be able to remove the fill tube. If these are seized, then you should call it a
day and forget the entire procedure.
● On reinstalling the fill tube, make sure you use antiseize to prevent this from happening in the future.
Kick-Down Cable Adjustment.
Function of Kickdown Cable. [Discussion from Abe Crombie] The kickdown cable is used to regulate a pressure in the transmission valve
body. This is called throttle pressure. The throttle pressure is effectively a pressure that "tells" shift valves in transmission how hard you are
pushing the throttle and these shift valves now have a contest to see if governor pressure or throttle pressure is going to win. This pressure
is also used to apply the clutches/brakes that engage a gear and the higher pressure goes along with higher engine power at higher
throttle. Firmer shifts are a result of higher throttle pressure. If throttle pressure wins the contest the trans remains in lower gear, if
governor pressure wins the trans upshifts. Governor pressure is directly related to driveshaft, and thus road speed. If you tighten cable
you increase throttle pressure and the whole shift point/road speed "map" goes higher. If you loosen cable the shift point map moves
lower. The trans throttle cable (kickdown cable) also depresses a valve if you (or the throttle spool) pull the cable all the way out past that
hard spot which is a detent to make you aware of the actual kickdown feature. The kickdown valve increases the throttle pressure
drastically above the linear rate that you get from the rest of the throttle pedal travel range and makes the gearbox goes to lowest possible
gear allowed at the road speed you are at when you activate it.
Adjustment of Cable. The kickdown cable has no adjustment at the transmission end, it's fixed. All the adjustment is under the hood, at the