Assembly Of Axle; Differential Case Assembly; Pinion Bearing Cup Installation - GMC 1990 Light Truck Repair Manual

4C3-8 T TRUCK FRONT AXLE
Important
• Lubricant all the seal lips, bearings, gears, and
bearing surfaces with axle lubricant prior to assem­
bly.

DIFFERENTIAL CASE ASSEMBLY

-► «- Install or Connect (Figures 1, 2 and 16)
Tool Required:
J 33790 Side Bearing Installer
1. Thrust washers (53) and side gears (54) into the
differential case (35).
• If the same gears and washers are being
used, install them on the same side as they
were removed from.
2. Pinion gears (56).
• Position one pinion gear (56) between the side
gears and rotate the gears until the pinion
gear is directly opposite the opening in the
case.
• Place the other pinion gear (56) between the
side gears, making sure the hole in both
pinion gears line up.
3. Thrust washers (55).
• Rotate the pinion gears toward the opening just
enough to permit the sliding in of the thrust
washers.
4. Shaft (52) and bolt (36).
5. Ring gear (37) onto the differential case (35).
6. Bolts (34).
Important
Always install new bolts. Never reuse the old
bolts.
Tighten
• Bolts (34) alternating in progressive steps to
80 N-m (60 ft. lbs.).
7. Side bearings (33), using J 33790 (figure 16).
PINION BEARING CUP
INSTALLATION
Install or Connect (Figures 1, 2, 17 and 18)
Tool Required:
J 33837 Pinion Bearing Remover and Installer
1. Bearing cup (41) into the case using J 33837-1,
J 33837-3, and J 33837-4 (figure 17).
2. Bearing cup (39) into the case using J 33837-1,
J 33837-3, and J 33837-4 (figure 18).

ASSEMBLY OF AXLE

Figure 16—Installing the Differential Side Bearings
J 33837-3
J 33837-1
J 33837-4
Figure 17—Installing the Outer Pinion
Bearing Cup
Figure 18—Installing the Inner Pinion
Bearing Cup
J 33790
F-01785
F-01786