well, the reason the transmission wont go higher than that is because of reliability issues. the torque converter is the main reason iirc. if you were to get a smaller diameter quality aftermarket one i think you'd have no problems. the rest of the system is anyone's guess, ive never heard of anyone going past 7k on a 604.

however, a prowler TCM i think can be made to work on your car, and its the only autostick 604/606 tcm that doesnt have a forced upshift around 6500 rpm.. so if you can get that to work, which shouldnt be harder than swapping in any other autostick tcm, you should be able to go all the way to the pcm's rev limiter. i dont know what that is, tho.. im kinda doubting it goes all the way to 7200.. anybody know for sure?






1993 Dodge Dynasty LE 3.3 Auto, 95k, Stock.
16.2@84mph