Lower & Upper Ball Joint
WARNING: This page is about a different car, the 2004 Ford Ranger, 2003 Ford Ranger, and 2002 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
Raise and support vehicle. Move lower edge of tire in and out while watching lower spindle arm and lower part of axle jaw. If movement exceeds 1/32" (.8 mm), install a new lower arm as necessary. To check upper ball joint, move upper edge of tire in and out. If movement between upper spindle arm and ball joint exceeds 1/32" (.8 mm), install a new upper arm as necessary.