Pontiac FIREBIRD 1972 Service Manual page 956

TURBO HYDRA-MATIC (M-40) TRANSMISSION 7E-67
2. Remove clutch outer race, bushings and sprag assem-
bly.
3. Turn unit over and remove backing plate-to-direct
clutch housing snap ring (Fig. 7E-125).
4. Remove the direct clutch backing plate, the composi-
tion and the steel clutch plates from the direct clutch
housing.
5. Using Clutch Compressor Tools J 4670, J 6129 and
J 8765, compress spring retainer and remove snap
ring (Fig. 7E-127).
6. Remove retainer and fourteen (14) piston release
springs.
CAUTION: Keep piston release springs separate
from forward clutch release springs.
7. Remove direct clutch piston (Fig. 7E-128).
8. Remove outer seal from piston.
9. Remove inner seal from piston.
Fig. 7E-128 Removing Direct Clutch Piston
3. Inspect clutch housing for cracks, wear, proper open-
ing of oil passages or wear on clutch plate drive lugs.
10. Remove center piston seal from direct clutch hous-
ing.
4. Inspect composition and steel clutch plates for sign
of wear or burning.
INSPECT
1. Inspect roller assembly for popped or loose rollers.
2. Inspect inner and outer races for scratches or wear.
Fig. 7E-127 Removing or Installing Clutch Piston Snap Ring
5. Inspect backing plate for scratches or other damage.
6. Inspect clutch piston for cracks and free operation of
check balls.
NOTE: The direct clutch piston contains two
(2) check balls for model PH transmissions
while other models contain only one (I) check
ball.
7. Inspect springs for collapsed coils or signs of distor-
tion.
NOTE: The fourteen (14) direct clutch release
springs are not serviced. I f one o f more of these
spnngs require replacement, discard all of them
and install the sixteen (16) service direct clutch
springs.
ASSEMBLE
1. Install a new inner clutch piston seal on piston, with
lip facing away from spring pockets (Fig. 7E- 130).
NOTE: Apply Hydra-ma tic oil to all seals.
2. Install a new outer clutch piston seal with lip facing
away from spring pockets (Fig. 7E- 13 1).