Last week I replaced my rear right wheel bearing. It was not moving freely. I decided to throw out the cheap Napa wheel bearing hub assembly, and replace it with the Timken one.
The old one was pretty stuck and fell apart when I took it out.
Timken one:
This reduced the wobble noise on the highway by a good bit, but it was still there! My local car buddy suggested I take a look at the rotors, they could be warped.
Tonight I was rotating the tires, in hopes of seeing if this would fix the wobble sound. Well I noticed something interesting, the left rear side stopped moving as freely as it used to be. Rotating the tire also resulted in a pretty loud sound. It looks like the rotor is warped after all, though there is a possibility that the wheel bearing went out too (it's the same Napa one that was on the right side).
The rotors that I used are the cheap $15 Napa ones. I think the left side might have warped with my hand brake being engaged while regularly driving. I've since loosened up the hand brake. I'm probably going to run out and get another $15 one. It should still be better then the Autozone special for $30. Unless you guys have a suggestion for which ones to get