Superchips 1855 Flashpaq for Ford Powerstroke F250, F350, F450 Diesel 6.0L, 6.4L and 7.3L Complete drivetrain tuning for your 1999 - 2010 Ford Power Stroke Automatic transmission optimization Speedometer calibration for axle gearand tire size changes from 28 inch - 40 inch Industry leading horsepower and torque gains Read and clear diagnostic trouble codes