I just got back from bracket racing. Lost the semi final beacause my tranny gave up in the middle of the race. Wondering if anyone has had this problem. When I put it in drive it just revs, but if I manually shift it through the gears it's fine except if it try's to down shift. I wondered if the stupid underdrive pulley is the culprit. The gauge only reads 9 volts at an idle but 12-13 when I'm on it. Just thought it might throwing the computer off. Not sure. Any help would be greatly appreciated.

Thanks

Shawn