just had a thread similar to your problem few weeks back...was having very loud vibrations so I changed my center bearing and checked my prop shaft..I have no guibo...still there, turned out to be my rear wheels where bent.I have a 17" AC Schnitzer...I just had it repaired then now its fine...don't know how they repaired my bent mags I guess they pressed it or something, their were no signs of repair and they didn't repainted my magsOriginally Posted by J.DeFeo