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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 S4WD and 9.25 Axles) >> Removal Procedure

Removal Procedure

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  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Drain the differential carrier. Refer to Front Axle Lubricant Replacement .
    3. Fig 1: View Of Front Axle Actuator Electrical Connector
    GM834234Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the actuator electrical connector.
  4. If only replacing the right side inner shaft and/or housing, follow the steps below. If only replacing the left side inner shaft, proceed to step 19.
    5. Fig 2: View Of Inner Axle Shaft Housing Wire Harness
    GM834265Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the wire harness from the inner axle housing.
  6. For vehicles equipped with the 8.25 inch axle, remove the front shock module. Refer to Shock Absorber and Spring Assembly Replacement .
  7. For vehicles equipped with the 9.25 inch axle, remove the stabilizer shaft link. Refer to Stabilizer Shaft Link Replacement (2500) or Stabilizer Shaft Link Replacement (1500) .
    8. Fig 3: View Of Wheel Drive Shaft Inboard Flange Bolt - Front Drive Axle
    GM763646Courtesy of GENERAL MOTORS CORP.
  8. Remove the wheel drive shaft flange bolts.
    9. IMPORTANT: Support the wheel drive shaft in order to not over flex the constant velocity (CV) joint.
  9. Disconnect the wheel drive shaft from the inner axle shaft.
    10. Fig 4: View Of Inner Axle Housing Nuts
    GM834241Courtesy of GENERAL MOTORS CORP.
  10. Remove the inner axle housing mounting nuts.
    11. Fig 5: View Of Front Axle Mounting Bracket (25/35 Series)
    GM365933Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: For the 25/35 series vehicles, perform the following steps in order to provide additional clearance so the inner axle housing can be removed from the vehicle.
  11. Remove the front axle mounting bracket to frame nuts.
    12. IMPORTANT: It may be necessary to pull down on the inner axle shaft and/or push up on the mounting bracket in order to gain clearance.
  12. Slide the front axle mounting bracket towards the engine.
    13. Fig 6: View Of Inner Axle Shaft Housing Bolts - Front Drive Axle (8.25 S4WD and 9.25 Axles)
    GM834261Courtesy of GENERAL MOTORS CORP.
  13. Remove the inner axle shaft mounting bolts.
    14. Fig 7: View Of Inner Axle Shaft Housing Assembly - Front Drive Axle (8.25 S4WD and 9.25 Axles)
    GM615922Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Keep the open end of the inner axle housing assembly up.
  14. Carefully remove the inner axle shaft housing assembly from the differential carrier assembly.
    15. Fig 8: View Of Inner Axle Shaft & Components
    GM1690931Courtesy of GENERAL MOTORS CORP.
  15. For the 8.25 inch axle, remove the following components from the inner axle housing:
    1. Clamp the inner axle shaft housing (4) in a vise. Clamp only on the mounting flange.
    2. Shifter fork spring (12)
    3. Shifter fork (11)
    4. Shifter fork rod (10)
    5. Shifter connector gear (9)
    6. Axle shaft snap ring (8)
    7. Axle shaft thrust washer (7)
    8. Axle shaft tabbed thrust washer (6)
    9. Inner axle shaft housing gasket (5)
    16. Fig 9: Inner Axle Shaft Housing Components
    GM2047154Courtesy of GENERAL MOTORS CORP.
  16. For the 9.25 inch axle, remove the following components from the inner axle shaft housing:
    1. Clutch fork inner spring (9)
    2. Clutch fork assembly (10)
    3. Clutch shaft shim (8)
    4. Clutch sleeve (7)
    5. Retainer ring (6)
    6. Thrust washers (5)
    17. Fig 10: Axle Shaft & Inner Axle Shaft Housing - Front Drive Axle (8.25 S4WD and 9.25 Axles)
    GM615683Courtesy of GENERAL MOTORS CORP.
  17. Using a soft-faced mallet (if necessary), remove the inner axle shaft (2).
  18. Remove the inner axle seal and the bearing from the axle housing. Refer to Front Drive Axle Inner Shaft Seal and Inner Shaft Bearing Replacement .
    19. Fig 11: Identifying Inner Axle Shaft - Front Drive Axle
    GM1581720Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: If only replacing the left side inner axle shaft, perform the following steps.
  19. Remove the wheel drive shaft inboard flange bolts from the inner axle shaft.
  20. Disconnect the wheel drive shaft from the inner axle shaft.
  21. Using a hammer and a brass drift, remove the inner axle shaft.
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