GM Full-Size Trucks 1988-1998 Repair Information

Upper Control Arm Pivot Shaft and Bushings-R-Series

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REMOVAL & INSTALLATION



10/1500 Series

See Figure 1

The following special tools, or their equivalents, are necessary for this procedure: J-24435-1, J-24435-3, J-24435-4, J-24435-5 and J-24435-7.

  1. Remove the upper control arm as explained earlier in this Section.
  2.  



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Fig. Fig. 1: Centering the upper control arm shaft (20/2500, 30/3500)-R-Series

  1. Remove the pivot shaft nuts and washers.
  2.  
  3. Assemble tool J-24435-1. J-24435-3, and J-24435-7 on the control arm. Tighten the tool until the front bushing is forced out.
  4.  
  5. Remove the pivot shaft.
  6.  
  7. Use the forcing procedure to remove the rear bushing.
  8.  

To install:
  1. Position the new front bushing in the arm and assemble tools J-24435-4, J-24435-5 and J-24435-7. Force the bushing into place until it is fully seated.
  2.  
  3. Install the pivot shaft.
  4.  
  5. Repeat the forcing procedure to install the rear bushing.
  6.  
  7. Install the lower control arm.
  8.  
  9. Install the nuts and washers. Tighten the nuts to 115 ft. lbs. (156 Nm).
  10.  
  11. Install the control arm.
  12.  

20/2500 and 30/3500 Series
  1. Raise and support the front end on jackstands.
  2.  
  3. Take up the weight of the suspension with a floor jack positioned under the lower control arm as near to the ball joint as possible.
  4.  
  5. Loosen, but do not remove, the pivot shaft-to-frame nuts.
  6.  
  7. Tape together and matchmark each shim pack's position for exact installation.
  8.  
  9. Install a chain over the control arm, inboard of the stabilizer bar and outboard of the shock absorber to hold the control arm close to the crossmember.
  10.  
  11. Remove the pivot shaft nuts, bolts and spacers.
  12.  
  13. Remove the grease fittings and unscrew the bushings from the control arm.
  14.  
  15. Remove the pivot shaft. Discard the seals.
  16.  

To install:
  1. Install new seals on the pivot shaft.
  2.  
  3. Slide the shaft into the arm.
  4.  
  5. Start the bushings into the arm and center the shaft in the bushings. Hand tighten the bushings to make sure the shaft doesn't bind.
  6.  
  7. Tighten the bushings to 190 ft. lbs. (257 Nm).
  8.  
  9. Check the pivot shaft for free rotation.
  10.  
  11. Install the grease fittings and lubricate the bushings.
  12.  
  13. Position the control arm on the frame and install the shim packs, spacers, nuts and bolts. Tighten the nuts to 105 ft. lbs. (142 Nm). Have the alignment checked.
  14.  

 
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