Pontiac FIREBIRD 1972 Service Manual page 967

7E-78 1972 PONTIAC SERVICE MANUAL
Fig. 7E-158 Case Passages
-
Front View
Inspect parking pawl shaft for damaged retainer
groove, if removed.
Inspect parking pawl return spring for deformed coils
or ends.
Inspect parking bracket for cracks or wear.
Inspect detent roller and spring assembly.
CASE ASSEMBLY
INSPECT
1. Inspect case for cracks, porosity or inter-connected
passages (Fig. 7E- 158 and 7E- 159).
Fig. 7E-159 Case Passages
-
Bottom View
CAUTION: If the case assembly requires re-
placement, make sure that the center support-
to-case spacer is removed fi-om the old case and
reinstalled in the new case.
2. Check for good retention of band anchor pins.
3.
Inspect all threaded holes for thread damage.
4. Inspect intermediate clutch driven plate lugs for
damage or brinneling.
5. Inspect internal case snap ring grooves for damage.
If grooves are broken, it is caused by either incor-
rectly installed snap rings and/or spacer or by high
oil pressure causing excessive forces (the usual cause
of high pressure is found in the pressure regulator
valve system).
6. Inspect governor assembly bore for scratches or scor-
ing.
7. Inspect modulator valve bore for scoring or damage.
8. Inspect for missing or loose intermediate clutch cup
plug (See Fig. 7E- 158 for location). If necessary to
install a cup plug, proceed as follows:
a. Place transmission case in holding fixture and
position with its front end facing up.
b. Make sure that the intermediate clutch cup plug
hole is free of dirt, chips, etc.
c. Place intermediate clutch cup plug (Group 4.103,
Part No. 86 1 17 10) into its passageway in the case,
open end of the plug out.
d. Drive plug until flush or slightly below top of
hole, using a 3/8" diameter by 10" long rod.
CAUTION: Make certain that rod used is large
enough in diameter to locate on the lip edge of
the plug, not the bottom o f the plug.
9. Inspect case bushing. If necessary to replace, proceed
as follows:
a. Remove
-
with case properly supported and using
Tool J 21465-8 with Handle J 8092, remove bush-
ing.
b. Replace
-
Use Tool J 21465-8, Adapter Ring
J
21465-9, Drive Handle J 8092 and Extension
J
21465-1 3. With its lube passage facing front of
case, drive the bushing into case until it is .040"-
.055" above the selective thrust washer face.
Stake bushing with Staking Tool J 21465-10, with
stake marks in the lube grooves.