its time to call on you mustang masters again. I finally got my car shot with a second coat of primer and it looks great getting real close to paint. well so on my way home from shooting a coat on it it starts to make a grinding noise every once in a while while driving. Its coming from what sounds to be the rear driver tire. to me it sounds as if my tires are rubbing on the body panels but they arnt. I took the rear tire off and it spins freely with no noise when its in the air. it does not matter what speed it is at. It is increadibly loud and a grinding sound that makes me scared to drive it. Im starting to think it could be the rear end but what would be the reason it only happens when there is weight on the car? any advice would be great guys and gals, thank you