Ford Aerostar 1986-1997 Repair Guide

Lower Ball Joint



  1. Position a floor jack under the lower control arm and jack the vehicle up far enough for the tire to clear the ground.
  3. Grasp the lower edge of the tire and move the wheel in and out. While the wheel is being moved, observe the lower spindle jaw and the lower control arm. A 1 / 32 in. (0.8mm) or greater movement between the lower control arm and the lower spindle jaw indicates the lower ball joint must be replaced.
  5. Inspect the rubber bushings at the lower control arm attachment points for wear or looseness. Repair or replace the parts if any damage is found.


The manufacturer recommends servicing the lower ball joint and lower control arm as one assembly. The lower ball joint is pressed into the lower control arm. The lower ball joint can, however, be replaced separately by pressing the old ball joint out and pressing a new one in. Refer to the lower control arm procedures to remove the lower control arm and to service the lower ball joints.