UPDATE: The mechanic looked at it again today and found a piece of a brake pad had broken off somehow and was getting caught in there somehow. He replaced the pads and now we are good. Phew!
Thanks in advance for reading. My 98 Corolla, auto-trans, starting making a thump/clunk noise every morning when I put it in reverse and start backing out of the garage. The noise doesn't happen in the moment I put the car in gear/reverse. It happens once I let my foot off the brake and the...