GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 2026175  Size: SH
  1. Depress the brake pedal and hold it.
  2. Note: 

       • Put a piece of cloth or equivalent (1) into the inside of the universal joint cover so that the boot does not touch the inside of the universal joint cover.
       • Do not remove the bolts.

  3. Using a hexagon wrench (6 mm), loosen the cross groove joint set bolts 1/2 turn.

  4. Object Number: 2026176  Size: SH
  5. Place matchmarks (1, 2) on the rear propeller shaft and the electromagnetic control coupling assembly.
  6. Remove the nuts and washers.
  7. Using a brass bar and a hammer, separate the rear propeller shaft with the center bearing shaft assembly.

  8. Object Number: 2026178  Size: SH

    Note: When removing the bolts and washers, do not apply excessive force to the universal joint.

  9. Remove the bolts (1, 2, 3, 4) and No. 2 center support bearing washers.
  10. Note: 

       • When removing the propeller shaft, do not apply a large force to the universal joint.
       • During and after the removal of the propeller shaft, keep the universal joint angle straight (within 15 degrees).
       • Be careful not to damage the oil seal.

  11. Pull out the propeller with center bearing shaft assembly from the transfer.

  12. Object Number: 2026340  Size: SH
  13. Insert a suitable seal installer (1) into the transfer to prevent oil leakage.

Installation Procedure


    Object Number: 2026340  Size: SH
  1. Remove the seal installer (1) from the transfer.
  2. Note: 

       • Be careful not to damage the oil seal.
       • Be careful not to damage the universal joint boot when installing the propeller shaft.

  3. Install the propeller with center bearing shaft assembly.

  4. Object Number: 2026176  Size: SH
  5. Align matchmarks (1, 2) on the rear propeller shaft and the electromagnetic control coupling assembly and install the nuts and washers temporarily.

  6. Object Number: 2026178  Size: SH

    Note: Use the removed washers when installation.

  7. Install the 2 No. 1 center support bearing assembly with the bolts (1, 2, 3, 4) and No. 2 center support bearing washers.

  8. Object Number: 2026176  Size: SH
  9. Align the matchmarks (1, 2).
  10. Caution: Refer to Fastener Caution in the Preface section.

  11. Install the center support bearing nuts and tighten to 37 N·m (27 lb ft).

  12. Object Number: 2026341  Size: SH
  13. Remove the piece of cloth (1) from the universal joint.
  14. Depress the brake pedal and hold it.
  15. Using a hexagon wrench (6 mm), tighten the bolts to 26 N·m (19 lb ft).

  16. Object Number: 2026342  Size: SH
  17. With the vehicle unloaded, adjust the dimension between the rear side of the cover and shaft.
  18. Specification
    Length A - 65.5 to 70.5 mm (2.579 to 2.776 in)


    Object Number: 2026269  Size: MH
  19. With the vehicle unloaded, adjust the front and rear dimensions between the edge surface of the center support bearing and the edge surface of the cushion respectively as shown, and then tighten the bolts.
  20. Specification
    Length A - 11.5 to 13.5 mm (0.453 to 0.532 in)

  21. Check that the center line of the bracket is at a right angle to the shaft axial direction.

  22. Object Number: 2026178  Size: SH
  23. Tighten the bolts (1) to 37 N·m (27 lb ft).
  24. If any vibration or noise occurs, perform joint angle check as follows and replace the No. 2 center support bearing washer with a proper one.
  25. Turn the propeller shaft several times by hand to stabilize the center support bearings.
  26. Using a jack, raise and lower the differential to stabilize the differential mounting cushion.
  27. Remove the transfer dynamic damper.

  28. Object Number: 2025700  Size: SH
  29. Using an angle meter or equivalent, measure the propeller shaft installation angle (6) and intermediate shaft installation angle (5).
  30. Specification
    No. 1 joint angle (1) - (6) - (5) = -1.74 degrees to +0.26 degrees

  31. Using an angle meter or equivalent, measure the rear propeller shaft installation angle (4) and rear differential installation angle (3).
  32. Specification
    No. 2 joint angle (2) - (4) - (3) = 1.20° to 2.20°

  33. If the calculated amount is not within the specification, adjust it with the No. 2 center support bearing washer.
  34. Install the transfer dynamic damper and tighten to 26 N·m (19 lb ft).