The car was supposedly gone over for the 08 season and never raced for 08. I tried changing the tires and I put the rear up on stands and turned it by hand. Changing the tires didn't change anything and I didn't hear anything when I turn it by hand. (without wheels on) I figured it has to do with weight or being able to turn it fast enough. I don't notice anything when I'm on the track. But that might just be me holding on to my pants.