wickedwiggles

Alright I had my wheel bearings go bad 8 months ago and replaced them. I also have had alignments since then as well. I have stoptech drilled and slotted rotors with gold cmax pads(they are cheap and decent, don't judge heh). I have this hi pitched like metal grinding/clicking sound coming from the rear every time I hit the brakes. I have replaced the rear pads and made sure the shims had grease on them. I have taken it to two dealerships and they all say it is the rotors after about 30 sec test drive of the car. The rotors never made this sound before I replaced the wheel bearings, plus since the same rotors are on the rear and back I feel that with the majority of stopping being done up there that they would buzz up there too. However this grinding bzzzzzzz sound is coming from the rear only. Any suggestions as to what it could be? Maybe the diff or the angle of the control arms? Also when you have the car off the ground and turn the driverside rear should the passenger side wheel turn at the same time or just randomly? Any help would be great b/c that sound bugs the hell out of me and I know it can't be good.

wickedwiggles

Any ideas?