GMC 1982 Light Duty Truck Service Manual page 462

4 B 4 -2 REAR A X LE
1. Nut
2. Washer
3. Companion Flange
4. Pinion Oil Seal
5. Gasket
6. Outer Pinion Oil Slinger
7 and 8. Cone and Roller
(Outer Pinion Bearing)
9. Shims (Outer Pinion
Bearing)
10. Inner Pinion Oil Slinger
DRIVE P IN IO N
Removal
1. Separate rear universal joint, tape trunnion bearings to
joint, position propeller shaft to one side and tie
propeller shaft to frame side rail.
2. Using Holding Bar J-8 61 4-11, attach d to pinion shaft
flange, remove self- locking nut and washer from pinion
shaft.
3. Install Tool J-8614-2, and 3 into holding bar as shown
in figure 4B4-4 and remove flange from drive pinion.
Remove drive pinion from carrier.
4. With a long drift, tap on inner race of outer pinion
bearing to remove pinion oil seal, slinger, gasket, outer
pinion cone and roller and shim pack. Tag shim pack
for reassembly.
5. Should inspection indicate necessity, pinion bearing
cups can be removed from carrier using long drift and
ham m er. Remove shims and oil slinger which are
11. Shims (Inner Pinion
Bearing)
12. Cup (Inner Pinion
Bearing)
13. Cone and Roller
(Inner Pinion)
14. Ring and Pinion
15. Gasket (Housing
Cover)
16. Screw and Washer
(Cover)
Fig. 4B4-1--Dana Differential With 9-3/4' Ring Gear - Exploded View
17. Cover and Plug
18. Lock Pin (Pinion
Shaft)
19. Differential Case
20. Shims (Differential
Adjusting)
21. Cone and Roller
(Differential Bearing)
22. Cup (Differential
Bearing)
23. Cap (Differential
Bearing)
located behind the inner bearing cup. Tag shims for
reassembly.
6. Remove inner pinion cone and roller using Tool
J-22912, installed as shown in Figure 4B4-5, and press
pinion from bearing.
Inspection
1. Clean all gears and bearings in cleaning solvent and
inspect all bearing cups, races and rollers for scoring,
chipping or evidence of excessive wear. On pinion
bearing rollers, inspect large end of rollers for wear.
This is where wear is most evident on tapered roller
bearings.
The pinion bearings are of the tapered type, and the
na tu ral wear p a tte rn is a frosted condition with
occasional slight scratches on races or rollers. This does
not indicate a defective bearing.
2. Inspect pinion splines and flange splines for evidence of
excessive wear.
3. Inspect ring gear and pinion teeth for possible scoring,
cracking or chipping.
24. Bolt (Differential
Bearing Cap)
25. Bolt (Ring Gear)
26. Pinion Shaft
27. Thrust Washer
(Pinion)
28. Pinion
29. Side Gear
30. Thrust Washer (Side
Gear)