The Perfect F250 Upgrade

From Diesel Power Magazine:

"After years of abuse, the 4R100 automatic transmission behind our 7.3L melted down in our '02 Super Duty F-250 that rides on 46-inch tires. Sometime during the past two years, a valve designed to warm the transmission during cold weather by bypassing the transmission cooler became stuck. This resulted in a gearbox that refused to send fluid to the radiator for cooling, even when the truck was pulling a heavy trailer loaded with another 2-ton 4x4..."

Read the full article here.