Tue, June 1st, 2010, 02:21 PM
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Whopper
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Join Date: May 2010
Location: Woodstock, Ga
Posts: 25
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Quote:
Originally Posted by JackandJanet
All-righty, if your speed was reading slow, the Tire Size (TS) you were using before was a bit too small. An error of 2mph in the 70mph range is in the 2-3% range. IF you were using 2560mm before, you'd increase that to 2611 - 2637mm.
My guess is though, you were not using 2560 earlier, but had entered something smaller? AND, when you enter the TS, also make sure the Gear Ratio (GR) is correct. The older Gryphon uses "placeholder" values for both TS and GR in the Custom Options menu, and BOTH of them can be wrong.
- Jack
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Originally I didn't change anything...I said "NO" to custom settings, that is when the 2MPH difference occured...in the #2 Tow setting. I am not sure what the default tire size is for the #2 tow tune, but that is where I started....then changed it to 2646 and it went way out of wack.
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2006 F150 4x4 Lariat 5.4L Screw
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