creepshow

^^ Driveshaft my thoughts too. Check and see if you lost any weights on it. Be a spot if it's gone you should be able to tell. Possible your rear end could vibrate too. I had a 79 Capri do it but couldn't find where it was, felt and sounded like a sound wave going threw the car. Good luck and let us know what you find?

Twisted

Thanks for the replies folks. I'll check on all of those things...and my harmonic balancer also. I've noticed that it wobbles a hairs-worth.

ttoppedaerocoupe

sounds the u-joints if the vibration only happens when youre on the throttle

alex