GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • DT 46429 Oil Seal Driver
    • DT 46512 Seal Installer
    • EN 46342 Driver Handle
    • J 44873 Pinion Flange Holder and Remover

    Object Number: 901211  Size: SH
  1. Lubricate all internal components with GM P/N 12578261 (Canadian P/N 10953455) prior to assembly.
  2. Use the EN 46342  (1) and the DT 46429  (2) in order to install the bearing (207) and seal (301).

  3. Object Number: 901152  Size: SH
  4. Install the output shaft (201) with bearing, NEW collapsible spacer (204) and washers (215). Note the proper installation direction of the spacer (204).

  5. Object Number: 901148  Size: SH
  6. Lubricate the threads of the output shaft with GM P/N 12378261 (Canadian P/N 10953455).
  7. Install the output yoke (208), NEW O-ring (302), NEW sealing washer (303), NEW washer (209), and NEW locknut (210).

  8. Object Number: 901216  Size: SH
  9. Secure the case in a soft-jaw vise.
  10. Notice: Refer to Fastener Notice in the Preface section.

  11. Install the J 44873 and bolts.
  12. Tighten
    Tighten the bolts to 48 N·m (35 lb ft).

    Important: Rotate the output yoke several times in both directions to seat the tapered roller bearings prior to measuring the rotating torque.

  13. Tighten the locknut to 108-294 N·m (75.6-217 lb ft) while measuring the rotating torque. Tighten the nut to achieve a rotating torque of 1.15-1.71 N·m (10.2-15.1 lb in).
  14. • If the rotating torque exceeds 1.71 N·m (15.1 lb in), replace the collapsible spacer and assemble again.
    • If the locknut tightening torque exceeds 294 N·m (217 lb ft), replace the collapsible spacer and assemble again.
  15. Remove the J 44873 and bolts.

  16. Object Number: 901237  Size: SH
  17. Stake the locknut using a 3.5 mm (0.138 in) punch.

  18. Object Number: 901141  Size: SH
  19. Install the input gear (214) with shim (216) and bearing (217) into the case.

  20. Object Number: 1196066  Size: SH
  21. Using the EN 46342  (1) and the DT 46512  (2), install the oil seal into the cover. Install the seal until the flat surface of the seal measures 0.00-1.0 mm (0.00-0.04 in) flush with or slightly above the surface of the cover (a).

  22. Object Number: 1330387  Size: SH
  23. Install a NEW O-ring (304) to the cover.
  24. Install the cover (101) and bolts (102).
  25. Tighten
    Tighten the bolts to 26 N·m (20 lb ft).

  26. Install the locating pin (105).

  27. Object Number: 901181  Size: SH
  28. Install the fill plug (401) and NEW washer (402).
  29. Install the drain plug (403) and NEW washer (404).
  30. Tighten
    Tighten the drain plug to 44 N·m (33 lb ft).


    Object Number: 1196061  Size: SH
  31. Install the ventilation valve (408), hose (407), and clamps (406).
  32. Inspect the unit for proper assembly. Refer to Transfer Case Assembly Inspection .