So within the last few days I've picked up some wheel grinding noises. Sounds like something being sharpened on a whetstone. Haven't had time to really get under and look, but I know it's in the back for sure. It's loud enough that the noise reflects off of everything I drive past so I can't tell which side it is (if that is in fact the case). Noise occurs whenever the wheels are in motion especially at low speeds and gets slightly louder when brakes are applied, and goes away somewhat at higher speeds/longer operation (or I'm going fast enough that I can't hear it). Very quick visual inspection through the wheel spokes showed the rotors seem to be okay but again, I haven't had an opportunity to look very hard. I'm going to be taking my wheels off to de-Plastidip them this weekend anyway so I'll have a chance to examine the rotors better, but does anyone have any thoughts as to what I should be looking for? Or am I completely off the mark and my u-joints have gone or something?