I have a 2003 Dodge Ram Quad Cab 3500 Diesel SRW 4X4 truck. The previous owners must have had larger diameter tires and had the speedometer calibrated fot the larger size. It now has stock size tires (265/70/R17) and the speedometer reads 10 MPH faster. Can this be fixed by disconnecting the bateries for a period of time to reset the speedometer to default stock values ?
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