For part two of our series about transforming Jared Lehenbauer’s new-to-him ’01 Ford F-250 into a truck that’s better suited to his needs, we’re detailing how to select the correct gear ...

The TruSpeed unit is available for GM, Ford, Chrysler/Dodge, and Jeep ... tire size and gear ratio change, and percentage change. Once installed on the vehicle, you can use the supplied charts ...