What is a CV Joint?
A CV axle assembly is a drivetrain component on a vehicle that delivers power from the transmission to the wheel. It is commonly used in front-wheel-drive systems, but can also be found on all-wheel-drive, and even some rear-wheel-drive vehicles with independent suspensions. A CV (constant velocity) joint is fitted near each end of the axle assembly.
How does a CV Joint work?
The CV axle runs between the transmission and the wheel hub and features a CV joint located at each end of the axle shaft. These joints allow movement to accommodate the many angles that the axle faces as part of a front wheel drive system. The CV joint is a type of universal joint, housed in a cup that lets it slide in and out and flex in multiple directions - all while the axle is spinning. That way, it can travel over bumps in the road with the suspension, while at the same time it can turn with the steering.
What are the symptoms of a bad CV Joint?
The CV joints are lubricated with grease and sealed inside a pair of rubber boots. These boots hold the grease inside, and they keep the dirt and grime outside. Otherwise, the CV joints would deteriorate rapidly. But, over time, the boots can become worn and can crack or tear. Some of the grease escapes and dirt enters the joint, causing it to break down. When this happens, the CV joint develops excessive play in its bearings. A repetitive clicking sound may be heard when the vehicle is accelerating through a curve - such as on a freeway entrance ramp. A clunking sound may be noticed upon deceleration. Vibration may be felt when traveling at highway speeds. A visual inspection of the CV axle shaft will usually reveal grease seeping from a crack or tear in one of the boots.
Can I drive with a bad CV Joint?
As a CV joint begins to deteriorate, and symptoms start to appear, the vehicle is still driveable. Once the process of breakdown in the CV joints begins, however, it does not reverse. The problem will continue to worsen. If left for too long, a CV joint can break apart, causing considerable damage to the steering and suspension and possibly a loss of control of the vehicle. At the least, the vehicle will be undrivable. The axle should be repaired or replaced sooner than later - before it fails.
How often do CV Joints need replacement?
A CV joint should last the lifetime of the vehicle. Unfortunately, it is not uncommon for an axle to fail. If a CV joint boot cracks or tears, it is only a matter of time before the joint wears out. If a boot is compromised, it can be replaced. If the problem is recognized before other symptoms happen (clicking or clunking sounds when driving), the life of the axle can be prolonged. Replacement of the joints and boots on a CV axle requires that the entire assembly must be removed from the vehicle and disassembled. Because of this labor-intensive approach - and because there is no guarantee how long the joint may last after being compromised - many owners choose to have the entire assembly replaced instead.
Enter the characters you see below
Sorry, we just need to make sure you're not a robot. For best results, please make sure your browser is accepting cookies.
Type the characters you see in this image:
Try different image
Conditions of Use Privacy Policy
© 1996-2014, Amazon.com, Inc. or its affiliates
We've detected some suspicious activity coming from your IP address and have temporarily blocked it as a security precaution. Please check the box to let us know you're human (sorry, no robots allowed).
We're offline for a tune-up, we'll be up and running smoothly very soon.
In the meantime, here are some other options available:
Visit an
Advance Auto Parts store
Sign up for
SpeedPerks Rewards
View us on Social Media
Facebook/Twitter/Blog
We appreciate your patience – for your next visit:
15% off
your next purchase.
Some exclusions apply.
Enter coupon code: in shopping cart.
We look forward to serving you,
The Advance Team