Speedometer Calibrator Inline Diesel Silverado/Sierra 2500HD/3500HD (17-19) Rough Country Drivetrain & Differentials - Pinion Components remove the coil springs

remove the coil springs

2013 Ford F-350 Super Duty Crew Cab Pickup

or transfer cases example (Dyna track housings

2006-2010 Ford Explorer

the coil must store and step up the voltage to maximum strength in between each firing

Speedometer Calibrator Inline Diesel Silverado/Sierra 2500HD/3500HD (17-19) Rough Country Drivetrain & Differentials - Pinion Components remove the coil springsPut the finishing touch on your lifted vehicle with Rough Country's Speedometer Calibration Device! This easy to use Speedometer Calibrator helps you quickly and easily reprogram your vehicle's speedometer to match the output of your larger tires. Your vehicle's computer is designed to track the speed based on your stock tire height. When upgrading to larger tires, there will be a discrepancy between your actual speed and the readout on your