Pontiac FIREBIRD 1972 Service Manual page 343

NON TYPE C DIFFERENTIAL 4A- 19
1
CLEAN A N D INSPECT
1. Thoroughly clean differential case and inspect, pay-
ing particular attention to ring gear mounting flange,
ring gear pilot, side bearing hubs, thrust washer sur-
faces, pinion shaft bore and side gear hub bores.
2. Remove nicks and burrs with mill file.
NOTE:
When using a new case, thoroughly
clean new case in suitable solvent, making cer-
tain all holes and bores are clean of steel flings
and foreign mzterial.
3. Clean side gears, pinion gears, pinion shaft and thrust
washers with suitable solvent. Inspect for excessive
wear.
4. Thoroughly clean ring gear and inspect back side for
any adhering material which may cause runout.
5. Position ring gear on case and check fit of gear on
flange and pilot. It should be from .002" tight to
.001" loose. If ring gear easily falls into position, it
must be replaced.
NOTE: If ring gear is replaced, pinion gear
must also be replaced as they are only serviced
in matched sets.
6. Replace parts as necessary and coat with clean gear
lube before installing in case.
ASSEMBLE
ALL EXCEPT GRAND PRlX MEDIUM DUTY
1. After making sure that mating surfaces are clean and
free of burrs, position ring gear on case so holes are
in line.
2. Lubricate attaching bolts with clean engine oil and
install.
Fig. 4A-22 Installing Pinion Shaft Locking Bolt
ADAPTOR
292 FOR A
-5-8980 A AND G
J--21026
AND G
SERIES
I
SERIES
Fig. 4A-23 Installing Right Differential Side Bearing - A and
G Series
CAUTION: Do not use hammer to force ring
gear on case.
3. Pull ring gear onto case by diagonally tightening
bolts across case. When all bolts are snug, tighten
bolts evenly and diagonally across diameter to 90 lb.
ft. torque.
Fig. 4A-24 Installing Right Differential Side Bearing
-
B
Series