The Ford E4OD transmission was designed to fit behind various powerplants including gas and diesel engines. Most failures revolve around the torque of the diesel motor, especially when power is increased over stock. The good news is that the framework of the E4OD allows for substantial increases in reliability and capability.
The Stage 2 package adds a billet input shaft for increased reliability when towing heavy loads, under modified power levels or street performance. The billet input shaft is designed to withstand greater torsional loads than the factory shaft, thus increasing reliability. The shaft is made of billet 300M material and precisely machined for an exact fit.
The ATS Stage 2 Package is designed for trucks that are used for light/moderate/heavy towing, greater-than-stock power levels and street performance. The transmission package comes with a 5 year/500,000 mile warranty.