Rear U Joint A duplicate (in most cases) U joint is located at the opposite side of the driveshaft which is connected to the transmission or transfer case (four wheel drive).
Front U joint
Rotate U Joint
Helpful Information When a U joint fails it can cause rhythmic squeaking or ticking that is usually more audible at slower vehicle speeds. This U joint contains many needle bearings housed inside of four bearing caps which rotate on the main body of the unit which require lubrication. This lubrication is held in place with the use of a grease seal which also rides on the main body, these bearings allow the U joint to operate under extreme load. Grease is used as lubrication which can either be serviced using a zirk fitting on the U joint, many manufacturer's provide grease already installed which is meant for the life of the U joint.