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Power Strokes
6.7 Aftermarket
Gear change speedo correction
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[QUOTE="The Butcher, post: 1198223, member: 17789"] Indeed it is simple math. What I was trying to point out is that from the factory the speedo might not be all that accurate to begin with. Since I went from the factory 34" tire height to a 38" (actual diameter 37.7"), my speedo should be off by 10% at any given speed. That isn't the case though per GPS and traffic radar signs. When my speedo reads 30MPH now, I am going 30MPH per GPS/radar, not 32-33MPH as the math would dictate. [/QUOTE]
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Gear change speedo correction
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