Speedometer reversed? - Ford Powerstroke Diesel Forum
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Old 10-03-2011, 02:59 PM
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Speedometer reversed?

My speedometer on my 2002 f-250 has been acting really strange. When i start out the speedometer is pegged at 100mph and as i drive it slowly goes down and will eventually stop at 70mph and fall back to 100mph when i come to a stop. At first it would correct it self after about 20-25min of driving and now it is just a persistant problem. There are no other indicator lights like the abs or overdrive light on.

After searching the forum the only thing i found was to switch out the vss in the rear differential which i did today to no change in the problem.

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Old 10-03-2011, 11:05 PM
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I would say that your cluster is bad. You can pull it and feed it a sign wave, I forgot the frequency range, to test the motion.
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