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Custom Chassis - Drive Line - Suspension - Wheels and Tires - LOWERING or STANDARD Discuss anything related to Custom Dodge Ram Wheels, Tires, Brakes, Suspension Mods, Chassis Mods and Tuning, Towing options, Driveline, Differentials, Sway Bars, Lowering Springs, Strut Braces, etc.


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  #1  
Old 04-09-2009, 02:41 PM
stangguy1
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Default 2006 ram 1500

Hello,
just went and picked my truck up and the speedometer appears to be off by around 8 mph. I looked into the factory options and the dealership said it originally came with 17" rims. Now it has 20" . does anyone know a how or what to do about recalibration of the speedo?
please and thanks
shane
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Old 04-09-2009, 05:35 PM
erm
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Speedometer calibration is now an electronic function within the truck computer.

You can recalibrate for differing tire sizes using a programmer, such as a SuperChips or HyperTech unit. If you have a HEMI, I'd suggest a DiabloSport Predator.

One other option. Since Dodge now makes and sells trucks with 20" wheels and tires, they should have a flash for this in their StarScan tool. When I upgraded tires and wheels on a GM truck some years ago, the dealer was able to load a program that accounted for the larger size using their "ScanTool II" handheld programmer and code reader.

I'd check with the dealer service manager or service writer on the availability of a flash for your computer on this.
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