What is the Constant Velocity Cv Joint
A constant velocity joint (CV joint) is a trans-axle component that transfers power from the transmission to the wheels. CV joints are mostly found on front-wheel drive cars and are located at each of the front wheels. A CV joint looks like a long metal cylindrical rod with rubber bellows at each end. Inside each of the bellows is grease that keeps the joints inside well lubed. One end goes into the trans axle while the other end goes to the hub. CV joints can be different sizes, depending on where the trans-axle is located. CV joints can also serve as a component for Anti-lock brakes due to a gear-like ring around the end that goes to the hub. There, the ABS sensor can measure wheel speed and activate the ABS system in the event of a skid.
The average lifespan of a CV joint is 10 years. Symptoms of bad CV joints can come in the form of sounds. You would hear a popping sound during turns if the outer joint is bad. You would also hear a plunging sound during driving if the inner joint is bad. Getting a CV joint is not expensive if you plan to either get the defective unit rebuilt or if you purchase a rebuilt one from a retailer. Otherwise, if you want a brand-new unit from a dealership, prepare to get set back at least $500. Purchasing a rebuilt unit is not a terrible thing to do. Most rebuilders will still use the same shaft, but will replace the joints on each end and repack them with grease and put new bellows on the ends. Most places offer a lifetime warranty on these parts.
When purchasing CV joints, be sure you are providing exact vehicle information such as year, make, model, and engine size. Also note what type of transmission your vehicle has. And, know if your vehicle has ABS or not.
The CV joint is a vital part of your vehicle. Understanding its functions and purpose will ensure that you know what to look for when diagnosing and purchasing this important component.
