Differential Case Assembly - GMC T Series 1994 Repair Manual

• The bearing cups should have been installed in
" Pinion Depth Adjustment."
1. The pinion inner bearing (5) using J 8609-01.
• Press the bearing onto the pinion until the bear­
ing cone seats on the pinion shims.
2. A new collapsible spacer (4).
• Lubricate the pinion bearings with axle lubri­
cant.
3. Pinion (7) to the axle housing.
4. Outer pinion bearing (39) onto the pinion using
J 5590.
• Hold the pinion forward from inside the case
while driving the bearing onto the pinion.
5. Pinion oil seal (38) using J 22388 (figure 15).
6. Pinion flange (37) to the pinion by tapping it with a
soft faced ham m er until a few threads show
through the pinion flange.
7. Pinion washer (36) and a new nut (35) while hold­
ing the pinion flange with J 8614-01 (figure 16).
Adjust
A. The nut until the pinion end play is just taken
up. Rotate the pinion while tightening the nut to
seat the bearings. Once there is no end play in
the pinion, the preload to rq u e should be
rechecked.
B. 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 lbs. in.) on new
bearings, or 1.1 to 1.7 N-m (10 to 15 lbs. in.) for
used bearings (figure 17).
C. 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. If the bearing preload is exceeded, the
pinion will have to be removed and a new col­
lapsible spacer installed.
D. Once the preload has been obtained, rotate the
pinion several times to ensure the bearings
have seated. Recheck the preload, and adjust if
necessary.
8. Differential case. Refer to " Backlash Adjustment."

DIFFERENTIAL CASE ASSEMBLY

Install or Connect (Figure 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 axle lubricant.
I.S id e gear thrust washers (19) to the side gears
( ).
22
2. Side gears (22) to the differential case (24).
• Reinstall the side gears on the same side as
removed.
3. Pinion gears (21) to the differential without the
thrust washers (20).
• Place one pinion gear onto the side gears so
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.