There are two types of axles found on the front of the vehicle. Constant Velocity (CV) joints are found on independent front suspension vehicles. Vehicles such as the Honda Civic and Nissan Sentra ...

Front-drive vehicles also use two joints, called constant velocity (or CV) joints, but they are a different kind that also compensate for steering changes. On rear-drive vehicles, one sign of a ...

which are rubber sleeves around the constant velocity joints. The boots keep grease in and debris out. A torn or missing boot allows for accelerated wear.