2002 F350 Lariat with 7.3L Diesel

Granted, the cooler is/was a problem (easily fixed with the 6.0 cooler)but the main problem is the solenoids and clutch pack in stock form. These transmissions are modifiable to 1,000hp+ by the right builder such as Brian's Truck Shop in Lead Hill AR. There are a few builders across the country who do this as well. They will custom build and match the transmission to your power and towing requirements. My 2001 F250 was putting down 460hp with 1050lbs torque on the dyno and it still would not keep up with my stock Duramax and the 6spd transmission when towing, especially in the mountains. The 4spd was always out of the power band. It had a higher low gear and lower hi gear ratios with fewer gears in between. Sure, the Ford would smoke the chevy (literally) when I poured on the coal but exhaust temps would go through the roof. If I could have put the 6spd Allison behind the 7.3, I would still be driving the Ford. Except for the tranny, the Ford was a superior truck in every respect. Brakes, steering, build quality, durability, you name it and it was all truck, not a SUV hybrid.