I had a wobbling sound (and a nasty vibration at highway speed) from a CV joint that was bad. Replaced the axle halfshaft and it's good now.
Might also feel your tires for bubbling and weird tire wear, that sort of thing. You could always jack it up, too and pull out on the top and bottoms of the wheels and see if you can feel any slop in the wheel bearings.
Good luck.
