Operational Requirements

Truck Details

The first digit is the number of wheel "sets" (dual tires is one wheel set) of the powered vehicle, and the second digit is the number of powered wheel sets.
For example, 11R22.5 or 275/80R22.5 or 500 Revs Per Mile
State the axle ratio or leave blank if your intent is to determine the optimum ratio.
If installed

Transmission

The choices are base transmission families
If known, enter performance calibration (for example, 1800S1). Leave blank if not known.
If known, enter performance calibration (for example, 1300S3). Leave blank if not known.