One of those tools is the American Expedition Vehicles' (AEV) ProCal Module. The ProCal allows easy calibration of gear ratio, tire size, the tire pressure threshold of the TPMS, and other useful ...
The days of counting teeth in speedometer drives to correct for gear ratio changes and tire size are long gone. The electronic age has arrived and has made dialing in our Jeep JK Wranglers much easier ...
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