GM Lumina/Grand Prix/Cutlass Supreme/Regal 1988-1996

Transverse Spring Assembly

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REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4 and 5

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Fig. Fig. 1: Remove the jack pad from the center of the spring



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Fig. Fig. 2: Spring retention plate removal



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Fig. Fig. 3: Disconnect the trailing arm the knuckle



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Fig. Fig. 4: Use the proper tool to compress the spring



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Fig. Fig. 5: Removing the transverse spring from the vehicle


CAUTION
Do NOT disconnect any rear suspension components until the transverse spring has been compressed using a rear spring compressor tool J-35778 or equivalent. Failure to follow this procedure may result in personal injury. Wear protective eye equipment when working on the suspension.

Do not use any corrosive cleaning agents, silicone lubricants, engine degreasers, solvents, etc. on or near the rear transverse fiberglass spring. These materials may cause spring strength depletion and consequent damage.

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle with jackstands.
  4.  
  5. Remove the jack pad from the middle of the spring.
  6.  
  7. If equipped with dual exhaust, remove the exhaust system.
  8.  
  9. Remove the spring retention plates.
  10.  
  11. Disconnect the right trailing arm from the knuckle.
  12.  
  13. If equipped, detach the ABS electrical harness.
  14.  
  15. Separate the rear leaf spring compressor tool J-35778 from the center shank and hang the center shank of the tool at the spring center.
  16.  


CAUTION
Attach the center shank of the compressor from the front side of the vehicle only.

  1. Install the compressor body to the center shank and spring. Center the spring on the rollers of the spring compressor only.
  2.  
  3. Fully compress the spring using the spring compressor tool J-35778.
  4.  
  5. Slide the spring to the left side. It may be necessary to pry the spring to the left using a prybar against the right knuckle. When prying, be careful not to damage any components.
  6.  
  7. Relax the spring to provide removal clearance from the right side, then remove the spring.
  8.  

To install:
  1. Using the spring compressor tool, compress the spring and install it through the left knuckle. Slide towards the left side as far as possible and raise the right side of the spring as far as possible.
  2.  
  3. Compress the spring fully and install it into right knuckle.
  4.  

The rear spring retention plates are designed with tabs on one end. The tabs must be aligned with the support assembly to prevent damage to the fuel tank.

  1. Center the spring to align the holes for the spring retention plate bolts.
  2.  
  3. Install the spring retention plates and bolts. Do NOT tighten at this time.
  4.  
  5. Position the trailing arm and install the bolt. Tighten the bolt to 192 ft. lbs. (260 Nm) for vehicles through 1994. For 1995-96, tighten the bolt to 177 ft. lbs. (240 Nm).
  6.  
  7. Remove the spring compressor tool J35778.
  8.  
  9. Tighten the spring retention plate bolts to 15 ft. lbs. (20 Nm) for 1988-94 vehicles or to 22 ft. lbs. (30 Nm) for 1995-96 vehicles.
  10.  
  11. Install the jack pads and tighten the bolts to 18 ft. lbs. (25 Nm).
  12.  
  13. Carefully lower the vehicle, then tighten the lug nuts to 100 ft. lbs. (136 Nm).
  14.  
  15. Connect the negative battery cable.
  16.  

 
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