Pontiac FIREBIRD 1972 Service Manual page 1032

TWO SPEED AUTOMATIC (M-35) TRANSMISSION
7F-45
Fig. 7F-74 Installing Clutch Plates
maintain .01OW to .020" clearance between TV
inner lever and selector inner lever after assembly.
Thread low band adjusting screw part way into case.
Lubricate and install inner and outer seals on reverse
piston (lips of seals facing rear of case); lubricate
reverse piston bore in transmission case with trans-
mission fluid.
With transmission case in holding fixture, position it
vertically (front of transmission facing up) and install
reverse piston into case with a twisting motion until
it bottoms in case (wire loop or feeler gauge may be
used to start lip of seal into bore of case).
Install seventeen (17) reverse piston return springs,
spring retainer and snap ring into position on reverse
piston.
Install Compressor Tools J 23327-1 and 2 through
snap ring and retainer and through rear bore of case.
With Pilot J 9542-4 on rear face of case, turn down
wing nut to compress return springs and expose snap
ring groove. Use care when compressing springs and
retainer over case hub so that spring retainer is not
damaged by catching on edge of case hub or in snap
ring groove of hub. Install snap ring and remove
tools.
Install large (waved) cushion spring, lubricate and
install reverse clutch pack into its case bore. Begin
pack by installing a reaction (spacer) plate and alter-
nating with a drive (faced) plates until all plates are
in place (Fig. 7F-74).
NOTE:
When installed properly, the single
notched lug of each reaction plate is aligned in
the 7 o'clock groove of case.
Install pressure plate ("dimple" in one lug to align
with 7 o'clock groove of case) and install clutch pack
snap ring.
Align internal lands and grooves of reverse clutch
drive (faced) plates and then engage reverse ring gear
with these plates. Engagement can be made by "feel"
while jiggling and turning reverse ring gear until all
clutch plates are engaged and ring gear has bottomed
in the transmission case.
Place output shaft caged thrust washer over output
shaft, install low sun gear needle thrust bearing (with
lip of bearing up) into carrier assembly and install
planetary carrier and output shaft into transmission
case.
Install input shaft into machined face of clutch drum
and install low sun gear splined bushing on and
against shoulder of input shaft.
Install input shaft-clutch drum assembly into case,
aligning end of input shaft with low sun gear needle
thrust bearing in carrier and indexing low sun gear on
clutch drum flange with short pinions of the planet
carrier.
Remove rubber oil seal ring from oil pump body and
install clutch drum selective thrust washer, gasket
and oil pump assembly into case. Install and tighten
two (2) pump-to-case attaching bolts to 15 lb. ft.
torque.
Check for correct thickness of clutch drum selective
thrust washer as follows:
Install a 5/16"
-
18 threaded bolt (or Slide Ham-
mer Bolt J 21904-1) into a threaded bolt hole in
pump. Mount a dial indicator on bolt so that
plunger of indicator is resting on end of input
shaft and "zero" indicator (Fig. 7F-77).
Push up on output shaft and observe total indica-
tor movement. Indicator movement should read
.028" to .059".
If reading is within limits, the correct selective fit
washer is being used.
If reading is not within limits, remove oil pump
and selective thrust washer. Change to thicken or
thinner selective thrust washer, as the case may
be, to obtain a .028" to .059" movement and re-
peat steps a and b. Clutch drum selective thrust
washers are available in thicknesses of .061n,
.078", .092" and .106".
If movement is above .059" with a .106" selective
thrust washer installed, check for excessive wear
on assembled parts or omitted thrust washers or
bearings in or behind planet carrier.