Cobalt 2006-2008, G5 2007

Control Arms & Links

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Bushing Replacement



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Remove the rear wheels.
  6.  
  7. Place 2 screw type jack stands under both ends of the rear axle.
  8.  
  9. Remove the rear brake hose bracket attaching nuts from the body.
  10.  
  11. Detach the rear brake hose brackets from the body allowing the lines to hang free.
  12.  
  13. Remove the lower shock bolts.
    WARNING
    Do not kink the brake pipes while lowering the axle.

  14.  
  15. Lower the jacks in order to remove the coil springs.
  16.  
  17. Temporarily re-install the lower shock bolts to support the axle.
  18.  
  19. Remove the bushing bracket to body bolts from both ends of the rear axle.
  20.  
  21. Using the jackstands, raise the rear of the axle until the bushing brackets pivot away from the body.
  22.  
  23. Remove the axle bushing through bolts and remove the bushing brackets.
    NOTE
    Note the depth and orientation of the old bushing before removal.



    Click image to see an enlarged view

    Fig. Driving out the old bushings with tool set J4450

  24.  
  25. Using tool J 44570 , install tool J 44570-1 with the lip between the axle sleeve and bushing flange. It may require tapping with a hammer to fully seat the tool.
  26.  
  27. Insert J 44570-3 through tool J 44570-1 and the axle bushing.
  28.  
  29. Install the washer and nut by hand, tightening until the tool is snug.
  30.  
  31. Using a hammer, drive the bushing from the axle sleeve.
  32.  
  33. Disassemble the tool and remove the bushing.
  34.  

To install:


NOTE
The axle bushings must be installed in the correct orientation as shown.



Click image to see an enlarged view

Fig. Correct axle bushing orientation

  1. Slide the new bushings into the axle sleeve in the same orientation noted during removal. Make sure the rubber end is facing inboard and the largest void is in line with the wheel hub center.

    Click image to see an enlarged view

    Fig. Axle bushing installation

  2.  
  3. Place the J 44570-1 onto the bushing. Make sure the bushing is still oriented correctly.
  4.  
  5. Insert the J 44570-3 through the J 44570-1 and the axle bushing.
  6.  
  7. Install the J 44570-2 bearing, washer, and nut.
  8.  
  9. Pull the bushing into the axle sleeve by holding the hex end of the threaded shaft while turning the nut.
  10.  
  11. Disassemble and remove the bushing installation tool from the axle.
  12.  
  13. Install the axle brackets to the axle bushings with the alignment slot on the outboard side.
    NOTE
    The axle bushing through bolts must be installed with the bolt head facing inboard.

  14.  
  15. Loosely install the bushing bolts, park brake cable brackets and nuts .
  16.  
  17. Using the jack stands, lower the rear of the axle until the bushing brackets contact the body.
  18.  
  19. Hand tighten the axle bracket to body bolts just enough to hold the brackets flush to the body.
    NOTE
    The axle through bolts must be tightened with the axle at the correct trim height and prior to tightening the axle bracket to body bolts.

  20.  
  21. Using the jack stands, raise the axle to the proper trim height specification by measuring the vertical distance between the bottom edge of the upper spring seat and the bottom of the notch in the lower spring seat. Refer to Rear Axle Beam, removal and installation for the D height measurement.
  22.  
  23. Tighten the axle bushing through bolts. Tighten the bolts to 66 ft. lbs. (90 Nm) plus 60°
  24.  
  25. Insert two 12mm diameter pins through the axle brackets into the underbody.
  26.  
  27. Align the left side axle bracket and snug down the bolts.
  28.  
  29. Align the right side axle bracket and snug down the bolts.
  30.  
  31. Tighten all of the bracket-to-body bolts. Tighten the bolts to 66 ft. lbs. (90 Nm) plus 30°.
  32.  
  33. With the axle supported by the jack stands, remove the lower shock bolts.
  34.  
  35. Lower the jacks in order to install the coil springs.
  36.  
  37. Install the coil springs, making sure the colored tag is facing the rear of the vehicle.
  38.  
  39. Raise the jacks until the springs are slightly compressed in order to install the lower shock bolts. Tighten the lower bolts to 81 ft. lbs. (110 Nm).
  40.  
  41. Remove the jack stands.
  42.  
  43. Reposition the rear brake hose brackets to the body.
  44.  
  45. Install the brake hose bracket attaching nuts.
  46.  
  47. Install the rear wheels.
  48.  
  49. Lower the vehicle.
  50.  

 
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