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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 339 (Rear Drive Axle) >> Repair Instructions >> Rear Axle Shaft Replacement >> Installation Procedure

Installation Procedure

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    Fig 1: Rear Axle Assembly
    GM788488Courtesy of GENERAL MOTORS CORP.
  1. Install the axle shaft into the rear axle housing, allowing the splines to engage the differential side gear.
    2. Fig 2: C-Lock From Button End Of Axle Shaft
    GM788486Courtesy of GENERAL MOTORS CORP.
  2. On axles without a locking differential, place the C-lock on the button end of the axle shaft.
  3. On axles with a locking differential, keep the pinion shaft partially withdrawn.
    4. Fig 3: Axle Shaft, Lock And Thrust Block
    GM156412Courtesy of GENERAL MOTORS CORP.
  4. 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).
  5. Pull the shaft flange outward in order to seat the C-lock in the differential gear.
    6. Fig 4: Pinion Shaft Locking Bolt
    GM156409Courtesy of GENERAL MOTORS CORP.
  6. Align the hole in the pinion shaft with the bolt hole in the differential case.
    7. CAUTION:

    Refer to Fastener Caution .

  7. Install the new pinion shaft locking bolt.
    • For the 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).
    8. NOTE:

    End play is the in and out movement of the rear axle shaft. Radial play is the up and own movement in the rear axle shaft.

  8. Check the rear axle shaft end play and the radial play. The rear axle shaft end play should be 0.012 inch per side and the radial play should be 0.002-0.003 inch. If the rear axle shaft is NOT within the specifications, replace any excessively worn parts.
  9. Install the rear axle housing cover and the gasket. Refer to Rear Axle Housing Cover and Gasket Replacement (8.6, 9.5 Inch Axles) , Rear Axle Housing Cover and Gasket Replacement (10.5 Inch Axle) .
  10. Install the brake caliper mounting bracket. Refer to Rear Brake Caliper Bracket Replacement (1500 Series) , Rear Brake Caliper Bracket Replacement (2500 Series) .
  11. Install the rear wheel speed sensor.
  12. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  13. Fill the rear axle with the proper axle lubricant. Refer to Rear Axle Lubricant Level Inspection (8.6, 9.5 LD Axle) , Rear Axle Lubricant Level Inspection (10.5 Inch Axle) .
  14. Lower the vehicle.
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