Chevrolet Full Size Cars 1979-1989

Rear Upper Control Arm

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REMOVAL & INSTALLATION



Remove and install ONLY one lower control arm at a time. If both arms are removed at the same time, the axle could roll or slip sideways, making installation of the arms very difficult.

  1. Raise and support the rear of the vehicle using jackstands under the rear axle.
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  3. Remove the upper control arm nut at the axle.
  4.  
  5. If equipped, remove the height sensor link.
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To remove the mounting bolt from the axle, it may be necessary to rock the axle. On some models, it may also be necessary to remove the lower shock absorber stud to provide clearance for the upper control arm removal.

  1. Remove the upper control arm-to-frame nut and bolt, then the remove the control arm from the vehicle. To install:
  2.  
  3. Position the upper control arm to the vehicle, then install the fasteners, but dot not tighten fully at this time unless the vehicle's weight is being supported by the rear axle. If the weight is on the suspension, tighten the upper control arm front bushing nut to 92 ft. lbs. (125 Nm). For 1989 vehicles, either tighten the front nut to specification or the front bushing bolt to 122 ft. lbs. (165 Nm), whichever is easier to access. Tighten the rear bushing nut to 70 ft. lbs. (95 Nm) or the rear bushing bolt to 80 ft. lbs. (108 Nm).
  4.  

The control arm fasteners must be tightened with the vehicle suspension at curb height. If the vehicle is supported by jackstands under the rear axle, this should be sufficient to duplicate that circumstance. If there is sufficient clearance and you so desire, the fasteners may be fully tightened after lowering the vehicle.

  1. Remove the jackstands and carefully lower the vehicle. If not done already, tighten the control arm fasteners to specification.
  2.  

 
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