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Home >> Chevrolet >> 1987 >> Forward Control 5.7 M, Automatic, 475/M40 >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Suspension - Front) >> Adjustments & Checking >> Ball Joint Checking >> Upper Ball Joint

Upper Ball Joint

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1987 GMC Safari, 1987 GMC S15 Pickup, 1987 GMC S15 Jimmy, 1987 GMC Cab & Chassis, and 1987 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise vehicle. Support with jack stands under lower control arms, as close as possible to each lower ball joint. Ensure upper control arm bumper does not contact frame. Place dial indicator against lower part of wheel rim. Push in on bottom of tire while pulling out at the top. Read gauge, then reverse push/pull procedure.
  2. Lateral (horizontal) deflection should not exceed .125" (3.18 mm). Disconnect ball joint from knuckle and check for any looseness. If any of these conditions exist, replace ball joint.
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