Lower Ball Joint
Lower Ball Joints
The lower ball joint is the pivot point between the lower control arm and the spindle or knuckle support. Lower ball joints are also used in some 4WD drive vehicles with solid axles. In the case of a solid axle application, the lower ball joint connects the knuckle to the axle. The lower ball joint consists of a ball stud that is mounting in a steel housing. The ball stud can swing and rotate in the housing, which allows the spindle or knuckle to pivot. Greasing the ball joint on a regular basis will greatly increase the life of the part.