Originally Posted by baxr6na
Was a heavy viabration, was viabrating the back seat pretty bad....
I will bet you money it's simpler than that even - I reckon they forgot to tighten your wheel nuts properly.
I had this happen to me when I was visiting friends overnight once - someone tried to steal the 17's off the car and got interrupted, so the nuts were on but loose. Car drove fine till it hit about 90, then the most awful vibration in history started.
If it's something they fix straight away, I'll bet money that was the cause...