Twice I had the send the valve body back because the car would not shift at all. The 10.4 run would have be a *very* low to high 9 second run *if* the tranny would have shifted properly. Oh and that was the 2nd run down the track with a freshly rebuilt tranny from Level 10. Even when I was running high 10's the tranny was the hold back. I would probably still be racing today if I didn't have all the tranny problems I did :-(.