Forgive me if this isn't clear and concise, as I'm relatively new to this. I have a 6L80E in a 2011 Camaro SS that has been modded, and tuned with EFILive. The transmission shifts fine when I launch at the drag strip from 1st gear in Sport Mode, however when I launch from M2 the transmission flares badly and hits the rev limiter before it shifts. The TCM is programmed to auto shift at WOT from M2. If you're wondering why I would launch from 2nd it's because I'm trying to slow the car down to where it runs higher than 12 seconds in the 1/4, so I can pass tech (no roll bar) for bracket racing. I do use a professional tuner and he seems to be baffled by this, but I dabble at changing shift points and other easy, simple stuff. Thanks for any thoughts.