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Looking for the correct Speedo calabration

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Old Jun 8, 2009 | 07:33 PM
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Catmandoram's Avatar
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From: Durham, Ca
Talking Looking for the correct Speedo calabration

Anyone know where I can buy an adjustment calabration for 37" tires to correct my speedo? I'm thinking of a plug in adjustment to the computer, unless someone has used the speed gear thing.
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Old Jun 8, 2009 | 08:38 PM
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From: Salem,In.
Find out the revolutions per mile for your tires and take it to the dealer than can program that number in the abs system.
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Old Jun 9, 2009 | 12:08 AM
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From: Durham, Ca
Yea. I talked to them and for what they charge I would rather buy something I can use if I change wheel size.
Thanks
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Old Jun 9, 2009 | 06:40 AM
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From: Stanwood, Wa.
Superchips makes a "plug in" Re-Calibrator...
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Old Jun 9, 2009 | 07:04 AM
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If you know someone that has a scan tool, like a Snap-on, they can set it for you. Just about any garage should have one, I walked them through the programs (No charge).
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Old Jun 9, 2009 | 09:36 AM
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Thanks everyone. I'll check out Super-Chip. If not I'm going with Procomp ACCU speed-o-meter
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Old Jun 9, 2009 | 11:40 PM
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From: Wet Coast, Canada
A Smarty will do it, plus you will get all the other benefits
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Old Jun 10, 2009 | 09:22 AM
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From: new york, where else?
Originally Posted by ratsun
A Smarty will do it, plus you will get all the other benefits
I thought a tripple dog would do it too...not sure.
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Old Jun 10, 2009 | 01:27 PM
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Texasimport's Avatar
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From: Loveland CO.
Just in case you want all the numbers. Go to this URL and it tells you how to calculate tire height etc. Then you know what to tell your programmer. I used my speedo adjust as my excuse for my SMARTY.

http://www.thefosterfamily.org/4x4/tires.html
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Old Jun 11, 2009 | 04:36 AM
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stroker101's Avatar
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From: slidell, la.
Originally Posted by dodgedude361
I thought a tripple dog would do it too...not sure.
mine doesn't. i can enter every tire size on the programmer and the speedo is still of by 10mph (faster than the gps)
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