Full Billet

Inside Dorsey Diesel’s Stage 4 4R100

- Mike Mcglothlin

Tuning, turbo, and injection system technology has come a long way for the 7.3L Power Stroke in recent years. The amount of horsepower that can be gleaned from Navistar’s dinosaur V8 is constantly on the rise, and at the present time it’s not uncommon for a 7.3L-powered Ford to be making 600 to 650 hp at the wheels. However, pushing the 7.3L platform to new heights has had its downside: a lot of dead E4OD and 4R100 transmissions. In many cases, the parts used in the built transmissions of yesteryear no longer suffice in