3rd Gen 4 Runner Ball Joint . What are Lower Ball Joints (LBJ) and what do they do? Changing ball joints at home with simple tools. Lower Ball Joint Replacement Tutorial - YouTube (Rosalie Davis) Combining two such joints with control arms enables motion in all three. Bilstein suspension, SPC UCAs, new ball joints, bushings and links..tonight and measure one of the OD of one of their ball joints, remeasure the ball joint that came out of the UMI A-arm and the opening in the A-arm and report back. A ball joint is used for allowing free movement in two planes at the same time, including rotating in those planes. A ball joint is essentially a flexible ball and socket that allows the suspension to move and, at the same time, the wheels to steer. Dynatrac Ball Joints are built specifically for the. During a lower ball joint replacement... Houston ... Lower Ball Joints - Toyota 4Ru