Speedometer-gear calibration and selection should be an integral part of any changes to your Mustang's chassis or driveline. Changes to wheel and tire size alter the speedometer reading because the ...

If you drive your hot rod, even once in a while, then you depend on all of your gauges to be reliable and accurate. Just a small percentage of miscalibration can result in engine damage or failure, ...

A Pontiac's speedometer is as important as any other gauge found within its instrument panel. It was relatively accurate when new, but any deviation from original tire size and/or rear-axle ratio ...

I have a '67 fastback with a C4 transmission from a '71 Mustang. I also have a Traction-Lok rear with 3.50 gears. The problem is the speedometer. All of my research indicates the way to calibrate the ...