I just picked up a problem with a scrubbing noise that appears to be coming from my passenger rear tire. I took the tire off, looked at the pads, rotor, etc., and all seemed fine. I put the car in drive, (on jack stands of coarse), and it made the noise. I took off the caliper, rotor etc, put it in drive again, and no noise. I put everything back together again, and after 50 miles of driving, and parking overnight, it's back to making the noise again. Any ideas?