Went to the strip today code came up just before it was looking to go to 5th around 70 mph and just shuts down so cleared the codes and tried it again and same deal. It wont do it cruising at 50mph and then flooring it shifts great only does it from a 10mph or stopped launch. Trans is 28 months old maybe 8 trips down the track. I do have a new tune and this is the first time I have raced this tune or even had it above 70 mph at still hard in the throttle. Any input would be nice but I am thinking the trans needs freshening up kinda weird as I only have maybe 475 hp.