Isuzu Ascender 2003-05

Wheel Bearings

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Removal & Installation





Click image to see an enlarged view

Fig. Cross-sectional view of the rear axle, bearing and seal assembly

A new pinion shaft lockbolt should be installed whenever either of the axle shafts is removed.

The axle shaft and seal may be removed and replaced without disturbing the bearing or seal but it is highly recommended to replace the seals when removing the axle shaft.

  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Rear wheels
     
    Brake drums

    Click image to see an enlarged view

    Fig. Pinion shaft lockbolt and axle C-lock locations, inside the differential

     

  4.  
  5. Using a wire brush, clean the dirt/rust from around the rear axle cover.
  6.  
  7. Drain the fluid.
  8.  
  9. Remove or disconnect the following:
    NOTE
    Be careful not to damage the oil seal.


    WARNING
    If equipped with an Anti-Lock Brake System (ABS), be careful not to damage the reflector ring on the axle shaft or the speed sensor bolted to the backing plate, immediately adjacent to the shaft.



    Rear pinion shaft lockbolt and the pinion shaft
     
    C-lock from the button end of the axle shaft by pushing the axle shaft inward
     
    Axle shaft from the axle housing
     

  10.  
  11. Remove or disconnect the following:
    WARNING
    DO NOT damage the housing oil seal surface.



    Oil seal by prying it from the end of the rear axle housing
     



    Wheel bearing using the GM Slide Hammer tool J-2619, the GM Adapter tool J-2619-4 and the GM Axle Bearing Puller tool J-22813-01
     

  12.  

To install:

  1. Clean and inspect the components for excessive wear or damage and replace them, if necessary.
  2.  
  3. Install or connect the following:
    WARNING
    Be sure the bearing installer does not contact and damage the speed sensor on ABS equipped vehicles.


    NOTE
    Be sure the seal installer does not contact and damage the speed sensor on ABS equipped vehicles.


    WARNING
    BE CAREFUL not to damage the wheel bearing seal.



    New or reused bearing, coated with gear lubricant, using the Axle Shaft Bearing Installer tool J-34974 to drive the bearing in until it bottoms against the seat
     



    New seal lubricated with gear oil using the GM Axle Shaft Seal Installer tool J-33782 to seat it in the housing until it is flush with the axle tube
     



    Axle shaft into the housing by engaging the splines
     
    C-lock retainer on the axle shaft button end
     



    Axle shaft by pulling it outward to seat the C-lock retainer in the counterbore of the side gears
     
    Pinion shaft through the case and the pinions. Tighten the new lockbolt to 27 ft. lbs. (36 Nm).
     
    New rear axle cover gasket
     
    Housing cover
     
    Brake drums
     
    Wheels
     

  4.  
  5. Refill the housing.
  6.  

 
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