Ball Joint

Upper Ball joint Wear limit:
Apply upward force to the upper control arm and check the dial indicator.
If the dial indicator reading is more than 0.12 mm (0.005 in), replace the steering knuckle.

Lower Ball Joint Wear limit:
Gently lift or pry the suspension to induce ball joint movement.
If the dial indicator reading is more than 0.5 mm (0.020 in), replace the lower control arm.