Today I was messing with a buddy on the way back from getting his new car and floored it and it downshift and went like a bat out of hell then I heard a new exhaust note looked down I was at 6000 rpms and 100mph redline at 6200 it hit redline then shutdown till it shifted. what could have caused it? Tranny temps were at 165-175 and its never happened before what the hell did I do lol