does anybody know how to tell if your harmonic balancer is seperating? i get this vibration in my steering wheel at 70mph and up. i have checked driveline and it seemes good. tires are new with correct air pressure. it has to do with the engin some how i belive. when i let off the trottle and the converter unlocks the vibration goes away. the trannie was just serviced and only has 20k on it.