Hey all... Our 99 Pontiac Montana has had a "thump" when rolling since we bought it. It's now a 1.3 years and 10,000 miles later, and I finally replaced the suspected bearing, and the thump is gone... About a year ago, I had a shop change the drivers side axle because it looked a little off center and we thought that was the thump. That wasn't the thump, but after the guy touched it, there was a grinding noise in hard/warmed up braking. It sounds EXACTLY like worn to metal pads. I tacked it on to whatever was causing the thumping, the bearing, figured it wasn't the brakes because the pads and rotors were brand new (replaced while trying to find the thump). After swapping out the bearing yesterday, the grinding is still there. It only occurs when warmed up and late/hard braking. The rotors are smooth as a baby's butt. The pads have a lot of meat on them. Everything is tight, caliper/bracket/wheel, everything appears to have clearance. It doesn't seem to stop any differently either. It's hard to separate feeling from noise when it occurs, but it seems to still brake very smoothly, not like it would if there were some kind of brake interference. The rotors do have sort of a cut in them, the top and bottom edge of the braking surface have a higher edge, like the pads have worn the rotor down perfectly. Nothing looks like it should grind, though, all the contacting surfaces are perfectly smooth. Anyone have any ideas?