Chevrolet 1991 Light Duty Truck Repair Manual page 144

463-8 9 1/2-INCH RING GEAR
Figure 17— Installing the Pinion Flange
the pinion, the preload torque should be
rechecked.
• Remove J 8614-01. Using an inch-pound
torque wrench, check the pinion preload by
rotating the pinion with the wrench. Preload
should be at or below 2.3 to 2.8 N m (20 to 25
in. lbs.) on new bearings, or 1.1 to 1.7 N-m (10
to 15 in. lbs.) for used bearings (figure 18).
• If the preload torque is below the preloads giv­
en above, continue torquing the nut in small
increments. Check the preload after each tight­
ening. Each tightening increases the bearing
preload by several pounds. If the bearing
preload is exceeded, the pinion will have to be
removed, and a new collapsible spacer
installed.
• Once the preload has been obtained, rotate the
pinion several times to assure that the bearings
have seated. Recheck the preload, and adjust
if necessary.
8. Differential case. Refer to " Backlash Adjustment"
in this section.
Figure 18—Checking Pinion Bearing Preload
DIFFERENTIAL CASE ASSEMBLY
|+ * | Install o r Connect (Figure 1)
Tools Required:
J 8107-3 Differential Side Bearing Removal
Plug
J 8092 Driver Handle
J 29710 Differential Side Bearing Installer
• Lubricate all parts with rear axle lubricant.
1. Side gear thrust washers (32) to the side gears
(33).
2. Side gears (33) to the differential case (27).
• Place the side gears in place on the same side
as removed.
3. Pinion gears (31) to the differential without the
thrust washers (30).
• Place the pinion gears 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 (30).
• Rotate the pinion gears toward the differential
opening just enough to slide in the pinion
thrust washers.
• Check that the mating surfaces of the differen­
tial case and the ring gear are clean and burr
free.
5. Ring gear (15) to the differential case (27).
• Thread two left-hand threaded studs into the
ring gear on opposite sides.
• Place the ring gear onto the case, and align the
holes in the case with the studs (figure 19).
A. Left Hand Studs
20. Ring Gear
24. Differential Case
Figure 1&—Aligning the Ring Gear Studs
A
F4683