GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 2619-01 Slide Hammer
    • J 45859 Axle Remover

Removal Procedure


    Object Number: 156409  Size: SH
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  3. Remove the brake caliper. Refer to Rear Brake Caliper Replacement .
  4. Remove the rear wheel speed sensor. Refer to Rear Wheel Speed Sensor Replacement .
  5. Remove the rear axle housing cover and the gasket. Refer to Rear Axle Housing Cover and Gasket Replacement .
  6. Remove the pinion shaft locking bolt.

  7. Object Number: 156410  Size: SH
  8. On axles without a locking differential, remove the pinion shaft.

  9. Object Number: 156411  Size: SH
  10. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.

  11. Object Number: 156412  Size: SH
  12. On axles with a locking differential, use a screwdriver, or a similar tool, in order to enter the differential case and rotate the C-lock (1) until the C-lock aligns with the thrust block (2).
  13. Push the flange of the axle shaft (1) toward the differential.

  14. Object Number: 788486  Size: SH
  15. Remove the C-lock from the button end of the axle shaft.

  16. Object Number: 788488  Size: SH

    Important: When removing the axle shaft, do not rotate the shaft. Rotating the shaft will misalign the gears. Misaligning the gears will make the installing of the axle shaft difficult.

  17. Remove the axle shaft from the housing.

  18. Object Number: 885619  Size: SH
  19. If the axle is difficult to remove, use the J 45859  (1) and the J 2619-01  (2) to remove the axle shaft from the housing.

Installation Procedure


    Object Number: 788488  Size: SH

    Important: Carefully insert the axle shaft in order to not damage the seal.

  1. Install the axle shaft into the rear axle housing.
  2. Slide the axle shaft into place allowing the splines to engage the differential side gear.

  3. Object Number: 788486  Size: SH
  4. On axles without a locking differential, place the C-lock on the button end of the axle shaft.
  5. On axles with a locking differential, keep the pinion shaft partially withdrawn.

  6. Object Number: 156412  Size: SH
  7. On axles with a locking differential, place the C-lock (1) on the axle shaft (3) so that the ends are flush with the thrust block (2).
  8. Pull the shaft flange outward in order to seat the C-lock in the differential gear.

  9. Object Number: 156409  Size: SH
  10. Align the hole in the pinion shaft with the bolt hole in the differential case.
  11. Notice: Refer to Fastener Notice in the Preface section.

  12. Install the new pinion shaft locking bolt.
  13. Tighten

        • For the 8.0/8.6  inch axle, tighten the pinion shaft locking bolt to 36 N·m (27 lb ft).
        • For the 9.5 LD  inch axle, tighten the pinion shaft locking bolt to 50 N·m (37 lb ft).
  14. Install the rear axle housing cover and the gasket. Refer to Rear Axle Housing Cover and Gasket Replacement .
  15. Install the brake caliper. Refer to Rear Brake Caliper Replacement .
  16. Install the rear wheel speed sensor. Refer to Rear Wheel Speed Sensor Replacement .
  17. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  18. Fill the rear axle with axle lubricant. Use the proper fluid. Refer to Rear Axle Lubricant Level Inspection .
  19. Lower the vehicle.