Well I broke my Pro-shifted Tremec 600 for the second time. The first time I broke it I blew 3rd gear up, broke the case and destroyed the cluster. I had it in my 94 Cobra behind my 347. The car weighed like 3500lbs so I kinda chalked it up to the heavy car. The motor only makes around 425 at the wheels, so I shouldn't be over powering the tranny. Well after repairing the tranny we put it in a 91 Notch along with my 347. The 91 weights like 2800. I only got about 30 passes on the car before taking about 6 teeth off first gear, breaking the case and cluster again. The tremec works great. Shifts amazing after pro-motion did the pro-shifting for me but it doesn't seem to be holding together. What now? I don't want to go auto and I don't want something that's gonna shift hard or not be streetable. Anybody got any suggestions?