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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 121 (Rear Drive Axle) >> Repair Instructions >> Drive Pinion and Ring Gear Replacement >> Installation Procedure

Installation Procedure

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    IMPORTANT: The mating surface of the ring gear and the differential case must be clean and free of burrs before installing the ring gear.
    Fig 1: Ring Gear & Differential Case
    GM866505Courtesy of GENERAL MOTORS CORP.
  1. Install the ring gear to the differential case.
    2. Fig 2: Identifying Ring Gear Bolts
    GM866503Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The ring gear bolts have left-hand threads.
  2. Install the new ring gear bolts.

    Hand start each bolt to ensure that the ring gear is properly installed to the differential case.

    3. NOTE: Refer to Fastener Notice .
  3. Tighten the ring gear bolts. Tighten the ring gear bolts alternately and in stages, gradually pulling the ring gear onto the differential case.

    Tighten: 

    • For the 8.6 inch axle, tighten the ring gear bolts in sequence to 120 N.m (89 lb ft).
    • For the 9.5/9.5LD inch axle, tighten the ring gear bolts in sequence to 140 N.m (103 lb ft).

  4. Install the pinion bearing cups. Refer to Drive Pinion Bearings Replacement .
  5. Determine the selective shim thickness for the pinion gear. Refer to Pinion Depth Adjustment (10.5 Inch Axle)  or Pinion Depth Adjustment (8.6, 9.5, 9.5LD Inch Axles) .
  6. Install the selective shim onto the pinion.
  7. Install the inner pinion bearing to the pinion. Refer to Drive Pinion Bearings Replacement .
  8. Install a new collapsible spacer.
  9. Lubricate the pinion bearings with axle lubricant. Refer to Fluid and Lubricant Recommendations .
  10. Install the outer pinion bearing into the axle housing.
  11. Install the new pinion oil seal. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement .
  12. Install the pinion into the axle housing.
  13. Install the pinion yoke. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement .
  14. Install the differential assembly. Refer to Differential Replacement .
  15. Fill the axle with lubricant. Use the proper fluid. Refer to Lubricant Replacement - Rear Drive Axle (8.6 Inch Axle)  or Lubricant Replacement - Rear Drive Axle (9.5 Inch LD Axle)  or Lubricant Replacement - Rear Drive Axle (9.5 Inch HD Axle) .
  16. Lower the vehicle.
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