Okay. I had the students in the Auto Tech Lab at school replace the rear brake shoes and drums. They are 9.5 inch size and I got the parts at AutoZone. The problem: now when I make a right hand turn there is a grinding noise coming from the right rear wheel. Not a constant grind noise, kind of a chirping noise. It's quite loud at times. I had the students take it back apart and other than the adjuster spring hanging down unhooked, nothing seems out of place. I can't seem to see a place where it is obvious that there is metal on metal grinding spots. It is especially loud when backing up and turning right. Ideas?