Side Bearing Pre-Load Adjustment - GMC T Series 1994 Repair Manual

4. Pinion thrust washers (20).
• Rotate the pinion gears toward the differential
opening enough to slide in the pinion thrust
washers.
• Make sure the mating surfaces of the differen­
tial case and ring gear are clean and burr free.
5. Ring gear (7) to the differential case (24).
A. Thread two left-hand threaded studs into the
ring gear on opposite sides (figure 18).
B. Place the ring gear onto the case and align the
holes in the case with the studs.
C. Press the ring gear onto the case far enough to
start the bolts using J 8107-4 to protect the dif­
ferential from the press ram (figure 19).
NOTICE: Refer to "Notice" on page 4B2-1.
6. Ring gear bolts (23).
• Tighten the ring gear bolts alternately in stages
gradually pulling the ring gear onto the differen­
tial case.
A. Left Hand Studs
20. Ring Gear
24. Differential Case
Tighten
• The ring gear bolts in sequence to 120 N-m (90
lbs. ft.).
7. D ifferential side bearings (8) using J 22761,
J 8107-4, and J 8092 (figure 20).
A. Place J 8107-4 into the differential on the side
opposite of bearing installation to protect the
differential case.
B. Drive the bearing onto the case using J 22761
and J 8092.
8. Differential case (24) to the axle housing. Refer to
" Side Bearing Preload Adjustment."

SIDE BEARING PRE-LOAD ADJUSTMENT

• The differential side bearing preload is adjusted by
changing the thickness of the left and right shims
equally. This will not change the original backlash.
• Production shims are cast iron and are not to be
reused.
• Service spacer thickness is nominal at 4.32 mm
(0.170 inch).
• Service shims are available from 1.02 mm to 2.54
mm (0.040 to 0.100 inch) in increments of 0.101
mm (0.004 inch).
• Make sure the side bearing surfaces are clean and
free of burrs.
Tool Required:
J 22779 Side Bearing Backlash Gage
1. Place the differential case and the bearing cups
into the axle housing.
A. Lubricate the axle bearings with axle lubricant.
B. Support the case to keep it from falling into the
axle housing.
2. Install the strap from J 22779 on the left bearing
with the cap bolts. Tighten the bolts snugly.
3. Push the ring gear towards the pinion.
• Engage the ring gear with the pinion tightly, to a
F4683
backlash of 0.000 inch (No noticeable loose­
ness).