Lower Ball Joint
- Lower ball joint wear may be checked without disassembling ball joint stud. Raise and support vehicle at wheel and hub with jackstand.
- Measure distance between top of ball joint stud and tip of lower grease fitting. See Fig 1. Move support to lower control arm and allow wheel and hub to hang free.
- Measure distance again. If difference between measurements exceeds .094" (2.38 mm), replace ball joint. Inspect lower ball joint rubber grease seal for cracks, cuts or tears. Replace as necessary.
Courtesy of GENERAL MOTORS CORP.