One of the highly overlooked yet highly critical components of the drive-axle and steering assembly are actually the wheel bearings. Every wheel on your vehicle is attached to a hub and inside this hub is a set of lubricated wheel bearings that permit your tires and wheels to spin freely without building up too much heat. They are configured to last a very long time, but eventually, they will lose their lubricity, wear out, and need to be changed. They can even become loose from wear from inside the wheel hub assembly. If they break entirely, it can cause a wheel/tire combination to fall off the vehicle while at speed, resulting to a very unsafe driving situation.