Chevrolet 1988 Light Duty Truck Repair Manual page 160

4B2-8 1/2-INCH RING GEAR
8
DIFFERENTIAL CASE ASSEMBLY
Install or C o n n ect (F ig u re 1)
Tools Required:
J 8107-4 Differential Side Bearing Remover
Plug
J 8092 Driver Handle
J 22761 Differential Side Bearing Installer
• Lubricate all parts with rear axle lubricant.
1. Side gear thrust washers (19) to the side gears (22).
2. Side gears (22) to the differential case (24).
• Place the side gears in place on the same side
as removed.
3. Pinion gears (21) to the differential w ithout the thrust
washers (20).
• Place one pinion gear onto the side gears so
that the holes in the pinion gears are 180
degrees apart.
• Rotate the pinion gears into place, and verify
that the pinion gears line up with the pinion
shaft holes.
4. Pinion thrust washers (20).
• Rotate the pinion gears toward the differential
opening just enough to slide in the pinion
thrust washers.
• C h e c k th a t th e m a tin g s u rfa c e s of the
differential case and the ring gear are clean
and burr free.
5. Ring gear (7) to the differential case (24).
• Thread two left-hand threaded studs into the
ring gear on opposite sides (figure 17).
• Place the ring gear onto the case, and align
the holes in the case with the studs.
• Press the ring gear onto the case far enough
to start the bolts using J 8107-4 to protect the
differential from the press ram (figure 18).
6. New ring gear bolts (23).
• Tighten the ring gear bolts a lte rn a te ly in
stages gradually pulling the ring gear onto the
differential case.
$
T ig h ten
• The ring gear bolts in sequence to 80 N m (60
ft. lbs.).
7. Differential side bearings (8) using J 22761, J 8107-4
and J 8092 (figure 19).
• Place J 8107-4 into the differential on the side
opposite of bearing installation to protect the
differential case.
• 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 A d ju stm e nt" in this section.
SIDE BEARING PRE-LOAD ADJUSTMENT
• The differential side bearing preload is adjusted by
changing the thickness of both the left and right
sh im s equally. T h is w ill m a in ta in the o rig in a l
backlash.
• Production shims are cast iron and are not to be
reused.
• Service spacers are 0.170 to 0.172-inch thick.