Lower front ball joint. Remove spindle nut and free ball joint from spindle. Remove retaining/adjusting cap from the bottom of the ball joint. Then remove the lower cup and push the ball joint out through the bottom. Use a pick to remove the upper cup. Clean all the pieces and inspect for wear, replace if worn. Drill and tap a hole in the center of the retaining/adjusting cap and thread in a grease zerk. Reassemble with assembly lube, adjust and grease.