Review on Hypertech 752501 Speedometer 🔧 Calibrator: Maximizing Accuracy and Control by Sean Purnomo

. I tried it with good success and no other real options. For some reason Hypertech (like every other manufacturer I could find) listed products to recalibrate speedometers on almost every other jeep model but not the diesel version. I followed the steps outlined and got up to speed on the first try, confirmed by the GPS. *To measure a tire's circumference, I marked the tire with a piece of tape and rotated it a full revolution in the garage, then measured the distance on the floor between the two marks to determine my actual circumference, rather than the Tire size per sidewall specification in the online calculator.