GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 45185 Bore Gage Set


    Object Number: 1419809  Size: SH
  1. Clean the rear internal gear and air dry.
  2. Inspect the rear internal teeth for the following:
  3. • Chips
    • Cracks
    • Excessive wear
    • Metal debris embeded in teeth
  4. Replace the rear internal gear if any of the above conditions are found.

  5. Object Number: 1419807  Size: SH
  6. Install the rear internal gear flange (547) in the rear internal gear (536).
  7. Install the rear internal gear flange retaining ring (548).

  8. Object Number: 749708  Size: SH
  9. Clean the rear sun gear (539) and air dry.
  10. Inspect the rear sun gear teeth for the following:
  11. • Chips
    • Cracks
    • Excessive wear
    • Metal debris embeded in teeth
  12. Inspect the rear sun gear bushing for scoring or excessive wear.
  13. Using J 45185 and a micrometer measure the rear sun gear bushing inner diameter. Measure in three locations and take the average.
  14. Specification
    Rear sun gear bushing: 22.200 - 22.276 mm (0.874 - 0.877 in)

  15. If the rear sun gear bushing is not within specifications or any of the above conditions are found, replace the rear sun gear.

  16. Object Number: 749703  Size: SH
  17. Clean the front carrier assembly (542) and air dry. Ensure to remove all solvent in the pinion gears.
  18. Inspect the front carrier assembly pinion teeth for the following conditions:
  19. • Chips
    • Cracks
    • Excessive wear
    • Metal debris embeded in teeth
  20. Inspect for missing washers on both sides of the pinion gears.
  21. Inspect the front carrier bushing for scoring or excessive wear.
  22. Using J 45185 and a micrometer measure the front carrier bushing inner diameter. Measure in three locations and take the average.
  23. Specification
    Front carrier bushing: 30.00 - 30.076 mm (1.181 - 1.184 in)

  24. If the front carrier bushing is not within specifications or any of the above conditions are found, replace the front carrier assembly.

  25. Object Number: 749706  Size: SH
  26. Clean the front sun gear (544) and air dry.
  27. Inspect the front sun gear teeth for the following conditions:
  28. • Chips
    • Cracks
    • Excessive wear
    • Metal debris embeded in teeth
  29. Inspect the front sun gear shaft for excessive wear or scoring at the front carrier assembly bushing area.
  30. Using J 45185 and a micrometer measure the rear sun gear bushing inner diameter. Measure in three locations and take the average.
  31. Specification
    Front sun gear bushing: 22.200 - 22.276 mm (0.874 - 0.877 in)

  32. If the front sun gear bushing is not within specifications or any of the above conditions are found, replace the front sun gear.

  33. Object Number: 749697  Size: SH
  34. Install the front sun gear (544) into the front carrier assembly (542).

  35. Object Number: 749691  Size: SH
  36. Install the front sun gear retaining ring (541) into the groove of the front sun gear (544).