GM Full-Size Trucks 1988-1998 Repair Information

Torsion Bars and Support Assembly

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4

Special tool J-36202, or its equivalent, is necessary for this procedure.

  1. Raise and support the front end on jackstands.
  2.  



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Fig. Fig. 1: Matchmark both torsion bar adjustment bolt positions



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Fig. Fig. 2: Increase the tension on the adjusting arm

  1. Remove the wheels.
  2.  
  3. Support the lower control arm with a floor jack.
  4.  
  5. Matchmark both torsion bar adjustment bolt positions.
  6.  
  7. Using tool J-36202, increase the tension on the adjusting arm.
  8.  
  9. Remove the adjustment bolt and retaining plate.
  10.  
  11. Move the tool aside.
  12.  
  13. Slide the torsion bars forward.
  14.  
  15. Remove the adjusting arms.
  16.  
  17. Remove the nuts and bolts from the torsion bar support crossmember and slide the support crossmember rearwards.
  18.  
  19. Matchmark the position of the torsion bars and note the markings on the front end of each bar. They are not interchangeable. Remove the torsion bars.
  20.  
  21. Remove the support crossmember.
  22.  
  23. Remove the retainer, spacer and bushing from the support crossmember.
  24.  

To install:
  1. Installation is the reverse of removal, but please note the following important steps.
  2.  
  3. Position the support assembly on the frame, out of the way.
  4.  
  5. Align the matchmarks and install the torsion bars, sliding them forward until they are supported.
  6.  
  7. Bolt the support crossmember into position. Tighten the center nut to 18 ft. lbs. (24 Nm); the edge nuts to 46 ft. lbs. (62 Nm).
  8.  
  9. Install the adjuster retaining plate and bolt on each torsion bar.
  10.  
  11. Using tool J-36202, increase tension on both torsion bars.
  12.  
  13. Set the adjustment bolt to the marked position.
  14.  
  15. Release the tension on the torsion bar until the load is taken up by the adjustment bolt.
  16.  



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Fig. Fig. 3: Installing the torsion bar-K-Series



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Fig. Fig. 4: Torsion bar adjuster height-K-Series

 
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