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Old 05-02-2008, 08:34 AM   #17 (permalink)
ETx08Titan
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Re: Tire Size/Odometer/Speedo Correction...

I purchased the Hypertech In-Line Speedometer Calibrator from RealTruck.com for $206.99 shipped. (Use the coupon code SJ921) This was on my 08. It offeres tire/wheel size correction and gear ration correction. It was a pain in the arse to install. I had pull out the instrument panel to get the plug it connects to, but it worked. The tires I put on were wider but an 1 1/2" shorter so I was putting more miles on my truck than I was actually driving. But this fixed it and everything is reading correct according to my GPS.
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