CV (constant velocity) Joints

CV Joints (Constant Velocity Joints)

If you are considering buying a used vehicle equipped with CV joints, be sure to check for leaking or damaged CV boots.

CV joints are used on many types of vehicles especially FWD, 4X4 and AWD (all-wheel drive). CV joints attached to the drive axles allow power from the final drive assembly to be transmitted to the tire and wheel assembly thus powering the vehicle down the road. The CV joint allows the axle to flex or change angles to allow you to steer around a corner while transferring torque to the road. Also, these angles change as the vehicle suspension increases or decreases its ride height as road surfaces and load changes.

The longevity of the CV joint depends on its lubrication which is a special designed lubricant that is sealed inside a boot. The boot looks similar to a ribbed billows surrounding the inner and outer joints or the drive axles. When the boots leak joint damage will occur quickly. Remanufactured axle assemblies or boot kits are available as a repair. Either repair choice is not cheap. (Call or search online for prices/estimates).

If boots are leaking, damage to the joint may cause a rapid popping noise, especially while turning a sharp corner or accelerating. If popping occurs, forget the boot kit ‘fix’ and go with the axle assemblies.