Is my 904 toast?

Last night at the drag strip, I experienced a sound/feeling that spelled bad news.
It was my 5th run of the night and somewhere in 2nd gear I felt and heard a big vibration and shaking, can't really call it a grind but it was hard to really hear over the engine and the guy next to me. I felt nothing in 1st and it went away when I shifted to 3rd. My ET was right around where it usually is: 12.52", so it was certainly pulling like normal.

Below are the specs of the car and then the history...

Is my 904 toast?
Author: admin