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
     

  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:

    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.  


    Click image to see an enlarged view

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



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.

  1. Remove or disconnect the following:

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

  2.  


WARNING
DO NOT damage the housing oil seal surface.



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
 

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:

    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
     

  4.  


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



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
 


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



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


WARNING
BE CAREFUL not to damage the wheel bearing seal.



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
 

  1. Refill the housing.
  2.  

 
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