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calibrating speedo

1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

calibrating speedo

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Old

Mar 11, 2005 | 07:20 PM

#1

TRaGiK

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calibrating speedo

I read the tech article on how to calibrate the speedo, but it seems it only shows the formula for calculating tire size changes. What about for gearing changes? Right now my truck has 3.2x's in it, and tomorrow I'm installing 3.73's. How do I calibrate it for that?

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Old

Mar 11, 2005 | 07:33 PM

#2

TRaGiK

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Nevermind...I found my answer.

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Old

Mar 21, 2005 | 05:28 PM

#3

91Blues

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And what would the formula be for calibrating for tire size?

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Old

Mar 21, 2005 | 05:49 PM

#4

jimbob21rc

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From: Pulaski, TN

there is an article here, run a search for it and you should be able to find it.

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