[Dinobyte]

I was out today for a mini tour of the area, and when entering an on ramp to the 280, I got on it and heard a terrible sound from the rear end...

It is a major vibration every time I push the gas down, and it seems to be coming from the transmission tunnel or from just behind the seats...maybe even from the rear end.

The car still drives fine, but this sound and vibration is diffinitely not normal.

I have not done any burnout starts in the car...but have had spirited driving...so there has not been any dropping of the clutch to take off. Rolling take offs are the M.O. for the car.j

Does anyone have any ideas as to what might be happening before I put it up on jack stand and take a look.

Thanks
Michael