Lower Ball Joint
WARNING: This page is about a different car, the 1990 GMC Safari and 1990 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
- Wear indicator is built into the ball joint. Wear is indicated by the position of the 1/2" diameter round boss that the grease fitting is threaded into. A new ball joint has a boss projection of .050" (1.27 mm) beyond cover surface.
- With vehicle weight on wheels, check to see that wear indicator protrudes beyond surface of ball joint cover. Replace ball joint if wear indicator is even with housing or recessed.