wheel bearings have to be pressed in with a hydraulic press at your local machine shop or most mechanics have a press if they do wheel bearings on a regular basis. Also, I don't mean to sound dumb, but are you sure you have a bad bearing? You have to wiggle the wheel, NOT ROTATE IT, to determine if you have a bad bearing. From the sound you described though, it sounds like a bad bearing. Oh and I correct myself, for the rear wheels, you may be able to pull the bearing with a bearing puller, and possibly tap a new one in with a rubber mallet. I'm not sure really, as I've never replaced a rear one, but I know for the front's, you have to take the whole knuckle out of the car to have the bearings pressed out and in.