I need some help. I bought a 2000 Z-28 M6 about 2 weeks ago now, and it was already in the shop this monday becaus the main seal by the transmission was leaking oil and had to be replaced. They replaced that, and my hydrolic clutch cylinder. I got it back tonight, and every time i release my clutch in first gear I get a sound that is pretty audiable both inside and outside that is similiar to tires spinning on gravel. Any idea what this can be?