I changed tires from 255 to 245 on my 06 f150 and the speedo was out, I had the dealer reprogram and it was still out by 5 km/hr.
I am installing an Edge Evolution this week to optimize for towing, I'll be programming the tire size at the same time.
I thought I had read that the shift points are determined by speed, if this is true, then it would have been trying to shift to early as my speedo read 5 km more than actual speed.
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Thread: Speedo out??
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07-08-2013, 10:29 AM #1Junior Member
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Speedo out??
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07-28-2013, 04:34 PM #2Junior Member
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- Jul 2013
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I was able to adjust the speedo in the edge, not exactly accurate at lower speeds, but bang on at the highway speeds.
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07-28-2013, 07:42 PM #3Da Professuh
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- Alex
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shift points are determined by a variety of factors, throttle position, transmission load, converter state, etc. By stock, your speedo reads 2-3mph slow from the factory at 60mph
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