3. (a and b) On the lower control arm (LCA), we loosened the four bolts that secured the ball joint, but we didn't remove them. Next, we used a 21mm socket to loosen the nut on the ball joint, then removed the ball joint from the LCA. With a large hammer, Semon hit the side of the spindle two to three times, until it released itself, then removed it from the spindle. With the lower ball joint removed from the LCA, it was easier to remove the upper ball joint following the same process we did for the lower.