Corrects Speedometer. Is your Pony's speedometer off because you changed your rear gear ratio or tire size? Then you will need a Ford Racing Speedometer Recalibration Tool to correct your speedometer.
No Reprogramming Needed. The Ford Racing Speedometer Recalibration Tool scales a frequency based on the vehicle speed signal up/down to maintain accurate speed indication to the speedometer and to the PCM with no reprogramming of PCM necessary.
Application. This Ford Racing Speedometer Recalibration Tool will work on the 1994-2004 automatic and manual Mustangs as well as 2005-2010 manual Mustangs. 2005-2010 automatic Mustangs are limited to the equivalent of one step higher or lower gear change ratio (< /- 10% change).
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