Also heard that gs-t body's are unibody's which mean not all one solid piece. To much power to the rear causes body shakes. You can reinforce the tranny and rear but that sounds like mucho money. Not to mention turning the motor 90 degrees and posting new motor mounts. Sound tough. Tough part doesn't scare me but the money part does. Gs-x rear ends arn't all that great either from what I here. Too much power and BOOM. I think it's the tranny though.