GM Cadillac 1967-1989 Repair Guide

Rear Axle Assembly

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REMOVAL & INSTALLATION



See Figure 1

  1. Raise the car by the frame and place jackstands under the frame to support it safely. Place a support jack under the rear axle housing.
  2.  
  3. Disconnect the shock absorbers from the axle.
  4.  
  5. Mark the driveshaft and pinion yoke.
  6.  
  7. Move the driveshaft and support it out of the way.
  8.  
  9. Remove the brake line junction block bolt at the axle housing.
  10.  
  11. Disconnect the brake lines at the junction block.
  12.  
  13. Disconnect the upper control arms from the axle housing.
  14.  
  15. Lower the rear axle assembly on the support jack.
  16.  
  17. Remove the springs.
  18.  
  19. Remove the rear wheels and drums.
  20.  
  21. Remove the rear axle cover bolts and cover.
  22.  
  23. Remove the axle shafts. Refer to the Axle Shaft removal and installation procedure.
  24.  
  25. Disconnect the brake lines from the axle housing clips.
  26.  
  27. Remove the backing plates.
  28.  
  29. Disconnect the lower control arms from the axle housing and remove the axle housing.
  30.  

To install:
  1. Place the rear axle housing into position and install the upper and lower control arms. Tighten the lower control arm-to-axle nuts to 90 ft. lbs. (122 Nm) and the bolts to 125 ft. lbs. (169 Nm). Tighten the upper control arm-to-axle nuts to 80 ft. lbs. (108 Nm) and the bolts to 90 ft. lbs. (122 Nm).
  2.  
  3. Install the backing plates.
  4.  
  5. Position the brake lines under the axle housing clips.
  6.  
  7. Install the axle shafts.
  8.  
  9. Install the rear axle cover and cover bolts and torque to 22 ft. lbs. (30 Nm).
  10.  
  11. Install the drums and wheels.
  12.  
  13. Raise the axle assembly on a support jack.
  14.  
  15. Install the springs.
  16.  
  17. Connect the brake lines at the junction block.
  18.  
  19. Install the brake line junction block bolt at the axle housing.
  20.  
  21. Install the driveshaft and tighten the strap bolts to 16 ft. lbs. (22 Nm).
  22.  
  23. Install the shock absorbers to the axle housing.
  24.  
  25. Fill with axle lubricant to a level flush with or within 1 / 4 in. (6.35mm) of the filler hole.
  26.  
  27. Bleed the hydraulic brake system.
  28.  
  29. Lower the car.
  30.  



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Fig. Fig. 1: Conventional differential case and bearings

 
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