Grand Prix Medium Duty; Removing Pinion Shaft; Installing Pinion Shaft Lucking Bolt - Pontiac Grand Prix Service Manual

STANDARD DIFFERENTIAL 4A-17
Fig. 4A-26 Removing Pinion Shaft
2. Remove nicks and burrs with mill file.
NOTE: When using a new case, thoroughly clean new
case in suitable solvent, making ceriain all holes and
bores are clean of steel filings and foreign material.
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 PRIX 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 bdts with clean engine oil and
install.
3. Pull ring gear onto case by alternately tightening
bolts around case. When all bolts are snug, tighten
bolts evenly and alternately across diameter to 90 lb.
ft. torque for Pontiac; 60 lb. ft. torque for Tempest,
Firebird, or Grand Prix.
CAUTION: Do not use hammer to force ring gear on
case.
Fig. 4A-27 Installing pinion shaft Lucking Bolt
4. Place side gear thrust washers over side gear hubs
and install side gears in case. ktplace any reused parts
in original sides.
5.
Position one pinion (without washer) between side
iears and rotate gears until pinion is directly opposite
from loading opening in case. Place other pinion
between side gears so that pinion sHaft holes are in
fine, then rotate gears to make sure holes in pinions
will line up with holes in case.
4
6. When holes line up, rotate pinions back toward
loading opening just enough to permit sliding in
pinion thrust washers.
7. Install pinion shaft and pinion shaft locking bolt.
Torque to 15 lb. ft. (Fig. 4A-27).
GRAND PRIX MEDIUM DUTY
1.
Clamp cap half of case in vise and install proper
side gear and thrust washer (Fig. 4A-28) in cap half.
2. Assemble the four pinions and the four thrust
washers onto the pinion cross shaft and place in
position in the cap half of the differential case (Fig.
4A-29).
3. Install second side gear and thrust washer, face
down so that side gear will mesh with pinion gears.
4. Install flange half of differential case, in proper
position to match alignment marks.
5. Insert case bolts and tighten to 30 lb. ft. (Fig.
4A-30).
6. After making sure that mating surfaces are clean
and free from burrs, position ring gear on case so that
holes are in line.
7. Lubricate attaching bolts with clean engine oil and
install.
8. Pull ring gear onto case by alternately tightening
bolts around case. When all bolts are snug, tighten