Damaged trans?

I went to the track yesterday and on my second time trial I snapped my u joint off the launch. My car is only a 13.90 in the 1/4 with a 318 and 4.56 gears. My question is with that u joint snapping in first gear could I have damaged the 904 I have in it. The car isn't a monster by any means and didn't know if that mattered or not.