GMC 1990 Light Truck Repair Manual page 162

91 2
4B3-2 / -INCH RING GEAR
1. Brake Drum
2. Wheel Stud
3. Axle Shaft
4. Rear Axle Seal
5. Axle Shaft Bearing
6. Pinion Nut
7. Washer
8. Pinion Flange
9. Pinion Oil Seal
10. Pinion Front Bearing
11. Collapsable Spacer
12. Axle Housing
13. Pinion Rear Bearing
4. Pinion shaft lock screw (29).
5. Pinion shaft (28).
6. Differential pinion (31) and side gears (33).
• Roll the pinion gears out of the case with the
pinion thrust washer (30).
• Remove the side gears and the side gear
thrust washers (32). Mark the gears and the
differential case as left and right.
7. Adjusting nut lock bolt (18).
8. Adjusting nut lock (16).
• Loosen the adjusting nut (17).
9. Differential bearing cap bolts (20).
10. Differential bearing caps (19).
• Mark the caps and the housing as left and
right.
20
14. Shim
15. Ring and Pinion Gear Set
16. A djusting Nut Lock
17. Bearing A djusting Nut
18. Lock Bolt
19. Bearing Cap
20. Bolt
21. Shim Pack (including spacer)
22. D ifferential Side Bearing
23. Brake Line Clip
24. Bolt
25. Cover
Figure 1—Rear Axle Components
11. Differential carrier (27).
12. Bearing outer races (21), shims (21) and bearing
13. Differential side bearings using J 8107-3 and
14. Ring gear bolts (26).
26. Ring Gear Bolt
27. D ifferential Case
28. Pinion Shaft
29. Pinion Shaft Lock Screw
30. Pinion Thrust Washer
31. Pinion Gear
32. Side Gear Thrust Washer
33. Side Gear
34. Brake Backing Plate
35. Split Washer
36. Bolt
37. " C" Clip
NOTICE: Be careful when prying the differential
case out of the axle housing so not to damage
the cover gasket surface. The differential case
must be supported when it is being removed to
prevent the case from falling and damaging the
case.
• Pry the case from the axle housing at the
differential " window" (figure 2).
adjusting nut (17).
• Mark the races and the shims as left and right,
and place them with the bearing caps.
J 22888 (figure 3).
• The jaws of J 22888 must pull from beneath
the bearing cone and not the cage. Use the
slots provided for this purpose.
• Ring gear bolts use left-handed threads.
F-04713