Pontiac FIREBIRD 1972 Service Manual page 1085

TURBO HYDRA-MATIC (M-38) TRANSMISSION 76-47
Fig.
7G-72
Compressing Accumulator Cover
25. Remove outer, center and inner flat seals from low
and reverse clutch piston.
26. Move transmission to horizontal position and, using
two (2) oil pan bolts, install Compressor
J 23069 on
oil pan face, compress intermediate clutch accumula-
tor piston cover and remove its retaining ring.
Remove tool (Fig. 76-72).
GOVERNOR
OVERHAUL OF MAJOR UNITS
All components of governor'assembly, with exception of
driven gear, are a select fit and each assembly is calibrated.
The governor, including driven gear, is serviced as a com-
plete assembly. However, the driven gear can be serviced
separately.
While it is necessary to disassemble governor assembly in
order to replace the driven gear, disassembly may also be
necessary due to foreign material causing improper oper-
ation. To disassemble governor assembly, proceed as fol-
lows:
DISASSEMBLE
1. Cut off one end of each governor weight pin and
remove pins, governor thrust cap, governor weights
and springs.
NOTE: Governor weights are interchanges ble
from side to side and need not be identified.
2. Remove governor valve from governor sleeve. Use
care in not damaging valve.
INTERMEDIATE CLUTCH
ACCUMULATOR PISTON
Fig. 7G-73 Removing Accumulator Piston
Remove intermediate clutch accumulator piston
cover, O-ring seal from cover, intermediate clutch
accumulator piston spring, intermediate clutch ac-
cumulator piston assembly (Fig. 76-73) and remove
outer hook-type oil seal ring from piston. Replace
ring if nicked or worn. Do not remove the inner te-
flon oil seal ring unless replacement is required. All
service inner accumulator piston oil seal rings are
metal hook-type.
INSPECT
Wash all parts in cleaning solvent, air dry and blow
out all passages.
Inspect governor sleeve for nicks, burrs, scoring or
galling.
Check governor sleeve for free operation in bore of
transmission case.
Inspect governor valve for nicks, burrs, scoring or
galling.
Inspect governor valve for free operation in bore of
governor sleeve.
Inspect governor weights for free operation in their
retainers.
Check governor weight springs for distortion or dam-
age.
Check governor driven gear for looseness of governor
sleeve, for nicks, burrs or damage. If replacement is
necessary, follow replacement below.