GMC 1989 Light Duty Truck Repair Manual page 221

1. B o lt
2. W a sh er
3. H ub C ap
4. G asket
5. A xle S h a ft
6. A d ju s tin g N ut
7. L ock R ing
8. T h ru s t W asher
9. W heel H ub
10. T h ru s t S p ace r
11. B earing
12. R e ta in in g R ing
13. R o to r
14. B earing
15. H ub Oil Seal
16. D e fle c to r
17. B o lt
18. Brake C a lip e r B racket
19. B o lt
20. A xle H o u s in g
21. B ra cket
• Loosen the jam nut (49) and back off the thrust
block adjusting screw (48) (figure 4).
• C enter punch one d iffe re n tia l c a rrie r leg and
bearing cap to identify the cap for reassem bly
(figure 5).
4. Bearing cap bolts (23).
5. Bearing caps (25) (figure 6).
6. Adjusting nuts (32).
7. Differential and gear assembly (36) from the carrier
(figure 7).
• Scribe a mark across the differential case halves.
Figure 3— C arrier in th e R epair Stand
12-INCH RING GEAR (ROCKWELL) 4B6-3
22. A x le V e n t
23. B o lt
24. W asher
25. B earing Cap
26. N ut
27. W a sh er
28. B ra cket
29. Plug
30. G a sket
31. Pin
32. A d ju s tin g N ut
33. B earing
34. N ut
35. W a sh er
36. D iffe re n tia l Case
37. P in io n and R ing G ear Set
38. S ide G ear T h ru s t W a sh er
39. R ing G ear B o lt
40. P in io n S p id e r
41. P in io n G ears
42. P in io n T h ru s t W ashers
Figure 2— Rear Axle C om ponents
8. Differential case bolts (44).
9. The top case half (36) (figure 8).
10. Side gears (43) and thrust washers (38) (figure 9).
11. Pinion gears (41) and thrust washers (42).
12. Differential pinion spider (40).
13. Ring gear nuts (34), washers (35), and bolts (39).
14. Ring gear (37) from the differential case.
15. Differential side bearings (33) using J 22912 and an
arbor press (figure 10).
Figure 4 — Loosening th e T h ru st A dju stin g S crew
43. S ide G ears
44. B o lt
45. W a sh er
46. C a rrie r
47. B o lt
48. T h ru s t B lo c k S crew
49. N ut
50. P in io n D epth S h im s
51. R e ta in in g R ing
52. B e aring
53. B earing
54. P in io n Cage
55. W a sh er
56. B o lt
57. B e aring
58. P in io n O il Seal
59. D e fle c to r
60. P in io n Flange
61. W a sh er
62. N ut
63. B a c k in g Plate
• Mark the bearings as left and right.
F-04734