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

Rear Strut Assembly

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REMOVAL & INSTALLATION



Except 1995-96 Lumina and Monte Carlo

See Figure 1



Click image to see an enlarged view

Fig. Fig. 1: View of the strut and related components-1995 Pontiac, Oldsmobile and Buick shown

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle with jackstands.
  4.  
  5. Remove the rear wheel and tire assembly.
  6.  
  7. Scribe the strut-to-knuckle for proper installation.
  8.  
  9. If equipped, remove the auxiliary spring, as outlined in this section.
  10.  
  11. Remove the jack pad.
  12.  
  13. Install rear leaf spring compressor tool J-35778, or equivalent. Refer to the Transverse Spring Assembly procedures in this section for installation details.
  14.  
  15. Fully compress the spring, but do NOT remove the retention plates or the spring.
  16.  
  17. Unfasten the two strut-to-body bolts.
  18.  
  19. Remove the brake hose bracket from the strut.
  20.  
  21. Remove the strut and auxiliary spring upper bracket from the knuckle.
  22.  

To install:
  1. Position the strut to the body and knuckle bracket.
  2.  
  3. Install the strut-to-body bolts and tighten to 34 ft. lbs. (46 Nm).
  4.  
  5. Install the strut to the knuckle, aligning the scribe marks and tighten the bolts to 133 ft. lbs. (180 Nm) for 1988-94 vehicles. For 1995-96 vehicles, tighten the bolts to 122 ft. lbs. (165 Nm).
  6.  
  7. Install the brake hose bracket.
  8.  
  9. Remove the spring compressing tool.
  10.  
  11. Install the jack pad and tighten the retaining bolts to 18 ft. lbs. (25 Nm).
  12.  
  13. If equipped, install the auxiliary spring.
  14.  
  15. Install the wheel and tire assembly and install the lug nuts finger-tighten
  16.  
  17. Carefully lower the vehicle, then tighten the lug nuts to 100 ft. lbs. (136 Nm).
  18.  
  19. Connect the negative battery cable.
  20.  

1995-96 Lumina and Monte Carlo

See Figure 2



Click image to see an enlarged view

Fig. Fig. 2: View of the strut assembly and related components-1995 Lumina and Monte Carlo shown

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle with jackstands.
  4.  
  5. Remove the rear wheel and tire assembly.
  6.  
  7. Scribe the strut-to-knuckle for proper installation.
  8.  
  9. Remove the brake hose bracket from the strut.
  10.  
  11. Unfasten the strut mount-to-body nuts.
  12.  
  13. Remove the strut/stabilizer shaft bracket from the knuckle.
  14.  

To install:
  1. Position the strut assembly in the vehicle and tighten the strut mount-to-body nuts. Tighten to 37 ft. lbs. (50 Nm).
  2.  
  3. Fasten the strut/stabilizer shaft bracket to the knuckle. Align the scribe marks to ensure proper alignment. Tighten the nuts to 122 ft. lbs. (165 Nm).
  4.  
  5. Install the brake hose bracket.
  6.  
  7. Install the wheel and tire assembly and install the lug nuts finger-tight.
  8.  
  9. Carefully lower the vehicle, then tighten the lug nuts to 100 ft. lbs. (136 Nm).
  10.  
  11. Connect the negative battery cable.
  12.  

OVERHAUL



Except 1995-96 Lumina and Monte Carlo

The rear strut assembly is not serviceable. The assembly is replaced as a complete unit.

1995-96 Lumina and Monte Carlo

See Figures 3 and 4



Click image to see an enlarged view

Fig. Fig. 3: Install the alignment rod



Click image to see an enlarged view

Fig. Fig. 4: Installation of the strut compression tool

This procedure requires the following tools:



J 34013-B Strut Spring Compressor
 
J 34013-20 Damper Rod Clamp
 
J 34013-38 Alignment Rod
 
J 34013-88 Strut Compressor Adapter
 
J 34013-125 Mounting Adapter
 
J 34013-218 Module Shock Support
 
J 35669 Strut Rod Nut Remover and Installer
 

  1. Remove the strut assembly from the vehicle, as outlined earlier.
  2.  
  3. Install tool J 34013-125 mounting adapter to tool J 34013-B spring compressor. Use the wing nuts to secure the tool to mounting holes C and E/K. The wide end of the adapter should be positioned outboard.
  4.  

Be sure tools J 34013-125 and J 34013-88 are aligned so they can open and close together. If the tools are not aligned properly, they will not open.

  1. Install module shock support J 34013-218 and strut compressor adapter J 34013-88.
  2.  
  3. Install the strut assembly to the top of spring compressor J 34013-B. The angle of the upper strut should match the angle of tool J 34013-125.
  4.  
  5. Close tool J 34013-218 and J 34013-88 and install the locking pin through the lower hole of J 34013-B and lower knuckle mounting hole of the strut.
  6.  

Only one pin can be used for mounting.

  1. Turn the screw on J 34013-B counterclockwise to raise the strut assembly up to J 34013-125. Be sure the studs go through the guide holes in J 34013-125 and the top of the strut assembly is flat against the tool.
  2.  
  3. Compress the spring approximately 0.50 in. (13mm) or 3 or 4 complete turns of the operating screw on tool J 34013-125.
  4.  


CAUTION
Do NOT over compress the spring assembly. Severe overloading may cause tool failure which could result in bodily injury.

  1. Insert strut rod nut remover and installer J 35699 on the nuts, then insert J 34013-38 or a No. 50 Torx®bit into the end of the shaft.
  2.  
  3. Remove the nut with J 35669 while holding the rod from rotating with J 34013-38 or a Torx®bit.
  4.  
  5. Discard the strut nut.
  6.  
  7. Turn the operating screw on J 34013-B clockwise to fully relieve spring assembly compression.
  8.  

To assemble:
  1. Install J 34013-125 to J 34013-B. Use the wing nuts to secure the tool to the mounting holes C and E/K. The wide end of the adapter should be positioned outboard.
  2.  

Be sure tools J 34013-125 and J 34013-88 are aligned so they can open and close together. If the tools are not aligned properly, they will not open.

  1. Install J 34013-218 and J 34013-88.
  2.  
  3. Install the strut assembly to tools J 34013-218 and J 34013-88.
  4.  
  5. Close tool J 34013-218 and J 34013-88 and install the locking pin through the lower hole of J 34013-B and lower knuckle mounting hole of the strut.
  6.  

Only one pin can be used for mounting.

  1. Install the strut assembly on top of J 34013-B. The angle of the upper strut should match the angle of J 34013-125. Be sure the top of the shock absorber assembly is flat tool J 34013-125. The shock absorber assembly will not be aligned correctly if it does not lay flat against the tool.
  2.  
  3. Install the spring and all other components to the strut. Make sure the upper and lower spring seats are positioned correctly.
  4.  
  5. Rotate the spring and spring seats together until the angled top matches the angle of the bottom surfaces of tool J 34013-125.
  6.  

Be sure the top of the strut assembly is flat against tool J 34013-125. The strut assembly will not be aligned properly if it does not lay flat against the tool.

  1. Turn the operating screw to J 34013-B counterclockwise to raise the strut assembly up to J 34013-125 without compressing the spring assembly. Be sure the studs on the strut assembly go through the guide holes in J 34013-125.
  2.  
  3. Fully extend the strut shaft and attach tool J 34013-20. this prevents the shaft from retracting during compression.
  4.  
  5. Place J 34013-38 down through the top of J 34013-B through the top of the strut assembly and onto the shaft.
  6.  

Make sure tool J 34013-38 is straight with the strut assembly. If J 34013-38 is angled, repeat steps 19-21 until the tool is straight.

  1. Slowly turn the operating screw clockwise to compress the spring assembly until the threaded portion of the strut shaft is through the top of the strut assembly.
  2.  


CAUTION
Do NOT over compress the spring assembly. Severe overloading may cause tool failure which could result in bodily injury.

  1. Install a new strut nut on the strut rod. Do not turn the strut rod when tightening the strut nut or the strut assembly could be damaged. Keep the strut rod in a stationary position when tightening the strut nut.
  2.  
  3. Place tool J 35669 on the shock absorber nut.
  4.  
  5. Insert tool J 34013-38 through J 35669 and tighten the shock absorber nut.
  6.  
  7. Tighten the shock absorber nut while holding onto tool J 35669. Tighten to 55 ft. lbs. (75 Nm).
  8.  
  9. Remove tools J34013-20, J 34013-38, and J 35669 from J 34013-B.
  10.  
  11. Remove the strut assembly from tool J 34013-B.
  12.  
  13. Install the strut assembly in the vehicle.
  14.  

 
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