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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 259 (Front Drive Axle) >> Repair Instructions >> Front Drive Axle Inner Shaft and Inner Shaft Housing Replacement (8.25 F4WD) >> Installation Procedure

Installation Procedure

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    Fig 1: Axle Shaft Inner Flange - Front Drive Axle
    GM1581721Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
    IMPORTANT: If replacing the left side inner axle shaft, perform steps 1 thru 3.
  1. Install the inner axle shaft into the differential case side gear using a soft-faced mallet until the retaining ring on the inner axle shaft is fully seated within the groove in the differential case side gear. Pull back on the inner axle shaft to ensure that the inner axle shaft is properly retained in the differential case side gear.
  2. Connect the wheel drive shaft to the inner axle shaft.
  3. Install the wheel drive shaft inboard flange to inner axle shaft bolts.

    Tighten:  Tighten the wheel drive shaft inboard flange to inner axle shaft bolts to 79 N.m (58 lb ft).

  4. If the right side inner axle shaft and/or housing was removed, perform steps 5 thru 7.
  5. Install the new inner axle shaft bearing and the new seal to the inner axle shaft housing. Refer to Front Drive Axle Inner Shaft Seal and Inner Shaft Bearing Replacement .
    6. Fig 2: View Of Inner Axle Shaft & Components
    GM1690932Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not install the inner axle shaft completely into the inner axle shaft housing at this time.
  6. Install the inner axle shaft (1) into the inner axle shaft housing (4).
  7. Install the new inner axle shaft housing gasket (3).
    8. IMPORTANT: For vehicles with RPO HP2 (Hybid), maneuver the inner shaft and housing to clear the electric motor for the steering rack for installation.
  8. Install the inner axle shaft (1) and the inner axle shaft housing (4) to the differential carrier assembly.
  9. Install the inner axle shaft housing bolts (2).

    Tighten:  Tighten the inner axle shaft housing bolts to 40 N.m (30 lb ft).

    10. Fig 3: View Of Inner Axle Shaft Housing Nuts To Bracket (8.25 F4WD Axle)
    GM763653Courtesy of GENERAL MOTORS CORP.
  10. Install the inner axle shaft housing nuts to the bracket.

    Tighten:  Tighten the inner axle shaft housing nuts to 100 N.m (75 lb ft).

  11. Align the splines of the inner axle shaft with the splines on the differential side gear.
  12. Install the wheel drive shaft inboard flange to the inner axle shaft.
  13. Using a soft-faced mallet, tap on the inner axle shaft until the retaining ring on the inner axle shaft is fully seated within the groove in the differential case side gear.
  14. Ensure that the inner axle shaft is properly seated by gently pulling and pushing on the inner axle shaft.
    15. Fig 4: View Of Wheel Drive Shaft Inboard Flange Bolt - Front Drive Axle
    GM763646Courtesy of GENERAL MOTORS CORP.
  15. Install the wheel drive shaft inboard flange to inner axle shaft bolts.

    Tighten:  Tighten the wheel drive shaft inboard flange to inner axle shaft bolts to 79 N.m (58 lb ft).

  16. Install the front shock absorber. Refer to Shock Absorber Replacement (2500 Series) .
  17. With either replacement procedure, fill the differential carrier assembly with axle lubricant. Use the correct fluid. Refer to Front Axle Lubricant Replacement .
  18. Lower the vehicle.
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