Hey guys, long time reader, now I have a quick question. Just changed rear rotors and pads. Rear passenger side is perfect, but on the rear drivers side, I hear a very faint metal on metal rubbing sound when i drive it. If i gently press on the brake pedal while I'm driving, the sound goes away. I used all AC Delco parts if that helps. Also lubed all metal on metal spots. Any help would be great. Thanks in advance.