I got lucky once as well. In a final round, I heard "POP" over all the noise of the car launching. I stayed in it and won the race. Sure enough, that one "pop" was one tooth off of an 8 3/4 gear. I always wondered if that standard 4.86 gear was saved from stripping more teeth because they were REM'ed and cryo'ed. But there was another one that did take out enough teeth to abort the run and hurt the trans.