GM Service Manual Online
For 1990-2009 cars only

Assembly Procedure

  1. Lubricate the pinion and side gears using axle lubricant. Use the proper fluid. Refer to Fluid and Lubricant Recommendations.
  2. Install the differential side gear thrust washers to the differential side gears.
  3. Install the differential side gears and thrust washers into the differential case. If the same differential side gears and thrust washers are being used, install the gears and thrust washers to the original locations.

  4. Object Number: 680404  Size: SH
  5. Install the differential pinion gears and pinion gear thrust washers by performing the following steps:
  6. 4.1. Position one pinion gear between the differential side gears.
    4.2. Position the second pinion gear between the differential side gears directly opposite the first gear.
    4.3. Rotate the differential side gears until the pinion gears are directly opposite the openings in the differential case.
    4.4. Install the thrust washers. Rotate the pinion gears toward the differential opening in order to permit the sliding in of the thrust washers.
  7. Install the pinion shaft.
  8. Install a new pinion shaft lock pin using a hammer and a drift pin.

  9. Object Number: 866505  Size: SH

    Note: The mating surface of the ring gear and the differential case must be clean and free of burrs before installing the ring gear.

  10. Install the ring gear to the differential case.

  11. Object Number: 866503  Size: SH

    Note: The ring gear bolts have right-hand threads.

  12. Install the new ring gear bolts. Start each bolt by hand to ensure that the ring gear is properly installed to the differential case.
  13. Caution: Refer to Fastener Caution in the Preface section.

  14. Tighten the ring gear bolts. Tighten the bolts alternately and in stages, gradually pulling the ring gear onto the differential case.
  15. Tighten
    Tighten the ring gear bolts in sequence to 177 N·m (131 lb ft).

  16. Install the differential side bearing. Refer to Differential Side Bearings Replacement.