Disclaimer: Links on this page pointing
to Amazon, eBay and other sites may include affiliate code. If you click them and
make a purchase, we may earn a small commission.
May I ax what kind of racing one does with a 1 ton dually? Pulling?
Whatever, 4L80 is really the only good choice. Only limit to those transmissions is your wallet.
Drag race only? TH400. Bolt it on and hook up one vacuum line and the reverse switch.
Streetable? 4L80E. Spend lots of money on a controller, but enjoy the overdrive.