nothing in the transmission will cause a vibration. its more than likely the axles or the tires.
I guess you've never had an input shaft go bad....
-Swash
I'm sorry, I can't hear you over the sound of how awesome I am...
2004 IBM/Black/A4 GTO -- 1 of 273 - and the slowest
2002 Galaxy Silver GTP - a few mods - sold