I have a noise coming from the front driver side wheel area. It is kind of like a clicking/knocking (at 1st I thought my engine was knocking). The faster I go the faster the the noise; if I tap the brake, even if not hard enough to slow the truck, the noise stops. The FSM says possibly loose side gears in differential. I am also thinking possuibly u-joint.
How do I check for loose side gears?