I have a 94 caravan with the A604 trans and this thing shifts when it want to. the fluid has been changed along with the gasket and the screen. They used that new fluid special for chrysler in it so i know thats not it. I can however shut the van off and it shifts good for a while but a few minutes later it stops again and i have to shut it off and restart. Could this be the speed sensor? Or maybe a shorted wire? Any ideas are welcome

cuz i'm lost..lol
Thanks!
JD