Need help with programming speedometer after gear install...

[MotleyCrue]

Hi guys, i installed my 4.10 gears, but on my diablo programmer, they dont list 4.10 it only lists 4.09 and with this setting my speedometer is still off. Why?? Do i need to adjust the "Tire revs mile"? Thanks

 

[03gtmustang]

Someone posted the same thing a couple days ago. How far off is your speedo? You should call diablo and ask them about it.

 

[MotleyCrue]

Not real sure how far off it is, im guessing atleast 15mph, i dont understand though why its 4.09 instead of 4.10 when in the instructions it mentions 4.1 is equal to 4.10, and there is no 4.1

Thanks