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Thread: Speedometer Calibration 2018 F150 3.5 EcoBoost

  1. #1
    Potential Tuner
    Join Date
    Oct 2020
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    Germany
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    1

    Speedometer Calibration 2018 F150 3.5 EcoBoost

    I have been trying to get my speedometer corrected for 35.4 and have been unsuccessful.

    OEM Tire Size 275/55 R20 changed to 325/60 R20.

    I have changed the "Use Tire Circ." setting to "Calibration", entered the correct "Driven Tire Cric." and adjusted both the "Max Tire Circ." and "Min tire Circ." settings.

    This did not appear to change the speedometer reading.

    Speedometer shows 100 km/h and GPS 110 km/h.

    forum_1.jpg = OEM
    forum_2.jpg = Changes

    Anything else to do?

    Regards,
    Frank
    Attached Images Attached Images
    Last edited by thats.me.frank; 10-25-2020 at 12:38 PM. Reason: Mistake

  2. #2
    Advanced Tuner LastPlace's Avatar
    Join Date
    Jul 2016
    Posts
    527
    Use Forscan to change it in the bcm.