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Power Strokes
6.7 Aftermarket
6.7 Tuning
speedometer calibration
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[QUOTE="andrewtac, post: 1498161, member: 28439"] I think they are set to run 3mph fast (you are slower than what you are reading). There is a pid (I think vss on torque) that shows actual speed. That is all based on putting the correct tire size on. I went to the next size to make my Speedo read actual (used forescan) and have since went back; I believe everything else (miles on odometer, DTE) that uses speed or miles uses vss and I didn’t want everything else off. [/QUOTE]
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