wow, those must be some sticky mofo's. I can't imagine your tranny going bad with it being fairly new and your car is basically stock isn't it? Except for typical ls1 stuff. I know my buddy just got his car back with a 3600stall and 3.73s in an auto and he floors it from a light and doesn't spin at all on bfgoodrich gforce dr's. If that helps at all ...

EDIT: and hmmm, why did you post this in ford tech? Are we the only ones that can spin nittos?