Because these vehicles are either front wheel or all wheel drive equipped, they vehicles do not utilize a solid axle system to drive the wheels. Instead, a shafts with flexible joints at both ends are incorporated into the vehicle. These flexible joints are called Constant Velocity (CV) joints. The advantage of this system is that steerability and independent suspension travel are maintained, while power is being delivered to the wheel.
See Figures 1 and 2
There is no regular maintenance service to be performed on a CV-joint. But regular inspection of the rubber boot and clamps surrounding the CV-joint is recommended. Verify that the boots have no cracks, tears or splits. Also look for signs of grease on the inside of the wheel, or around the engine, this is a sure indication of a torn CV-boot. In the event a boot is torn, repair it, or have it repaired as soon as possible. If a CV-joint is not serviced quickly, the grease will leak out, dry and ruin the joint.
The grease used in CV-joints is a Moly type grease designed to withstand the high temperatures that are created within the joint. This grease does not need replacing, unless the boot is torn and the grease is contaminated with dust, water and dirt.