The Voyages have fully electronic transmissions called A604.. Since the transmission and the differental are housed in the same case, you cant switch those transmissions around like you can say and old Chevy truck. If a A604 came out of it, it has to go back in. if not, nothing will work right.(speed sensors, shift points, ect...)
Macs Transmissions (Houston, TX)281-394-4951Macstransmissions@gmail.com