Answer: CV joints are required to keep your drive wheels moving at the same speed. The joints are needed to provide the connection between your suspension and your wheels. If you think about it, when you are driving, even down a straight road, your wheels are constantly bouncing up and down over the road. CV joints are the only part of an otherwise solid driveshaft that bends with the road, and while the vehicle is turning. Again, without properly working CV joints, your wheels would be moving at different speeds when you are steering or hit an uneven surface.