I bought a streetfighter c6 for my built 460 Had it professionaly installed and it shifts almost from the minute the car starts to move and is in 3rd by15-20 mph under normal accelleraction. but if i get in to it 1-2 doesn't change much but 2-3 hits about 25 mph The kick down is adjusted right and i have tried adjusting the modulator and engine vac is about 20 inches. everything is tci including the fluid tci max shift please help i don't want to hurt the trans thanks Fred