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Thread: 2007 Mustang GT Speedometer Calibration

  1. #1
    Potential Tuner
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    Jul 2006
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    2007 Mustang GT Speedometer Calibration

    I just got done tuning (with HPTuners) a 2007 Mustang GT with the 5 speed that had a Procharger and 4.10 rear gears. Everything I did to account for the gears had no effect. The speedo is still way off. Any ideas?


    Thanks,
    Don
    Last edited by don2; 11-02-2007 at 12:37 PM.

  2. #2
    Tuner
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    May 2006
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    Langhorne, Pa
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    It's kind of funny you mention this... I just noticed that the PCM thinks I have 3.31 gears, but according to the stamping on my rear housing I have 3.55's (which is what I ordered the car with), and yet according to a cop buddy of mine's radar gun, my speedo is dead on...
    2007 Mustang GT
    266rwhp 276rwftlb's. 13.6@104 stock.
    Adding a bunch of goodies and shooting for mid 12's.

  3. #3
    Senior Tuner Mep_q8's Avatar
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    Bader Norris
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  4. #4
    Potential Tuner
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    Excellent. Thanks!