Quote:
Originally Posted by cstanek
The Gryphon displays the true speed. Ford, in it's infinite wisdom, programmed the speedometer to display 1-2, sometimes 3 MPH slower than your actual speed. So, when you're adjusting tire size, you want the Gryphon to display the actual speed (i.e., match it to a GPS) and let the trucks speedo do whatever it wants. There are guys on here that don't even use the truck's speedo anymore; instead, they just rely on the Gryphon's digital readout to get a more accurate speed.
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well in this case, ford speedometer is 2-3mph faster. i dont recall it being like this before i changed my tire size. when i got the programer yesterday, i didnt change the tires size it came programed with. so i entered mine and i did noticed the shifts werent as violent but still better then stock. and thats when i also noticed the speedometer issue..