I think I may have a rear wheel bearing going. At very slow speeds coasting I hear a slight groan noise on the right side. My rear tires need replacement but I doubt they are making the racket. I haven't had my rear end apart for several years since my pinion replacement but if I recall it's a simple process to pull the cover, remove the C clip, pull the axles out straight out and then pull the outer bearing with a slide hammer. I'm not sure there is a definite way to really test the bearing since I doubt I'll see any slop in the wheel/tire. I'll probably pull the wheels, jack up the axle and run the rear axle at slow speeds just to see if there is any noise or out of roundness in the axle. Axles were good when I measured the roundout a few years ago ....and there is no vibrations with the car at high speeds. Any better suggestions? Wheel bearings are pretty cheap $ for the 2010.