GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Axle Housing

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REMOVAL & INSTALLATION




CAUTION
The axle housing is a heavy component. Use care when supporting the housing to prevent personal injury.

  1. Disconnect the negative (-) battery cable.
  2.  
  3. Raise the vehicle and support the rear of the vehicle at the frame. A jack must remain under the rear axle housing.
  4.  
  5. Disconnect the shock absorbers from the axle housing.
  6.  
  7. Mark and remove the driveshaft from the rear yoke.
  8.  
  9. Disconnect and plug the brake line from the junction block. Disconnect the height sensor if equipped with Electronic Level Control (ELC).
  10.  
  11. Disconnect the upper control arms from the axle housing.
  12.  
  13. Lower the axle housing using the jack.
  14.  


CAUTION
Some brake shoes contain asbestos, which has been determined to be a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from any brake surface! When cleaning brake surfaces, use a commercially available brake cleaning fluid.

  1. Remove the springs, rear wheels and drums.
  2.  
  3. Disconnect and remove the parking brake cables from the brake backing plates.
  4.  
  5. Disconnect the lower control arms and remove the axle housing.
  6.  

To install:
  1. Position the axle housing under the vehicle and connect the lower control arms. Only hand tight at this time.
  2.  
  3. Install and connect the parking brake cables to the brake backing plates.
  4.  
  5. Install the springs, drums and wheels.
  6.  
  7. Raise the axle housing using the jack.
  8.  
  9. Connect the upper control arms to the axle housing. Raise the axle housing until the frame starts to raise off of the supports. Torque the upper control arm bolts to 80 ft. lbs. (108 Nm) and the lower control arms to 122 ft. lbs. (165 Nm).
  10.  
  11. Connect the brake line to the junction block. Connect the height sensor if equipped with Electronic Level Control (ELC).
  12.  
  13. Install the driveshaft to the rear yoke.
  14.  
  15. Connect the shock absorbers to the axle housing.
  16.  
  17. Raise the vehicle and remove the support at the frame.
  18.  
  19. Connect the negative (-) battery cable and check operation.
  20.  

 
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