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new tires, speedometer wrong

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Old Mar 2, 2012 | 07:12 PM
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killerpigeon
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Default new tires, speedometer wrong
I went from the stock size tires to 285/70/27. I've noticed that my speed doesn't match my GPS speed. Before it was really accurate. How do I adjust this?
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Old Mar 2, 2012 | 07:14 PM
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There are in line electric control boards that adjust the signal from the sensor before it hits the computer. On some trucks it can be done with a setting
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Old Mar 2, 2012 | 07:15 PM
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Get a programmer and adjust through the software.
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Old Mar 2, 2012 | 08:21 PM
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Jeezus - 27" wheels?
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Old Mar 2, 2012 | 08:25 PM
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Originally Posted by al****
Jeezus - 27" wheels?
Yeah for real!
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Old Mar 2, 2012 | 08:37 PM
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Pretty sure he meant seventeen which would be a thirty-three inch tire. Dealer can adjust for a price or a programmer will do the trick.
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Old Mar 2, 2012 | 10:07 PM
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Originally Posted by jerrybizzle
Pretty sure he meant seventeen which would be a thirty-three inch tire. Dealer can adjust for a price or a programmer will do the trick.
I pray to God he meant 17...or else, "Houston...we have a problem"
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Old Mar 2, 2012 | 10:14 PM
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I seen a Ram on 30" rims today lol
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Old Mar 2, 2012 | 10:32 PM
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I did mean 17". Thanks alot guys for the information.
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