GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2009 🢒 H3 🢒 Driveline/Axle 🢒 Front Drive Axle 🢒 Front Differential Assembly Replacement

Removal Procedure
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the engine skid plate. Refer to Engine Shield Replacement.
  3. Remove the oil pan skid plate. Refer to Oil Pan Skid Plate Replacement.
  4. Remove the transfer case shield. Refer to Transfer Case Shield Replacement.
  5. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement.
  6. Drain the front drive axle. Refer to Front Axle Lubricant Replacement.
  7. Remove the front wheel drive shafts. Refer to Wheel Drive Shaft Replacement
  8. Remove the crossmember. Refer to Crossmember Replacement

    9. Note: Use tie straps to secure the front differential assembly to the transmission jack stand.

  9. Using an adjustable transmission jack stand, support the front differential assembly.
  10. Remove the vent tube from the front differential assembly.

    11. Object Number: 2069649 Size: SH

    Note: Steps 11 and 12 are for those vehicles equipped with the electronic locking differential.

  11. Remove the electronic locking differential electrical connector from the right frame rail.
  12. Disconnect the electrical connector (1) for the electronic locking differential.

    13. Object Number: 2069646 Size: MH
  13. Remove the left and right mounting bolts (1) for the front differential assembly.
  14. Remove the front differential assembly (2) from the vehicle.

Installation Procedure

    Object Number: 2069646 Size: MH
  1. Install the front differential assembly (2)  in the vehicle.

    2. Caution: Refer to Fastener Caution in the Preface section.

  2. Install the mounting bolts for the front differential and tighten to 110 N·m (81 lb ft).
  3. Remove the tie straps and the transmission jack stand from the front differential.

    4. Object Number: 2069649 Size: SH

    Note: Steps 4 and 5 are for those vehicles equipped with the electronic locking differential.

  4. Reconnect the electronic locking differential electrical connector (1).
  5. Install the electronic locking differential electrical connect on the right frame rail.
  6. Install the vent tube for the front differential. Refer to Vent Hose Replacement.
  7. Install the crossmember. Refer to Crossmember Replacement.
  8. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement.
  9. Install the front wheel drive shafts. Refer to Wheel Drive Shaft Replacement.
  10. Fill the front differential with fluid. Refer to Front Axle Lubricant Replacement.
  11. Install the transfer case shield. Refer to Transfer Case Shield Replacement.
  12. Install the oil pan skid plate. Refer to Oil Pan Skid Plate Replacement.
  13. Install the engine shield. Refer to Engine Shield Replacement.
  14. Remove the support and lower the vehicle.