How to: Check and Maintain CV Joints and U-Joints
CV joints and U-joints allow the wheels driving the car to move up and down with the suspension. CV joints, which allow for greater movement, are generally used on front-wheel-drive cars and cars with independent rear suspensions. U-joints are generally used on rear-wheel-drive vehicles and larger four-wheel-drive trucks. Both allow the joint to bend while the drive tubes rotate.
The first step in inspecting the drive joints is to drive the car and listen and feel for problems. Look and listen for the following when driving the car:
1. Vibration while driving.
A failing joint may cause vibration at specific speeds. Some U-joints will be smooth at low and high speeds, but start to ...