XCAL2 question

[lthlsnake]

I have a friend with an xcal2 (handheld tuner)and he has 410 gears. The tuner isnt tuned for 410s so its off 10mph. Now the question is how can he change it with the tuner to make his speedo right? thanks

Shaun

 

[Screamin Cobra]

It should ask you if you want to modify the parimeters, or something liket that and then go to where it says Axle Ratio and choose 4.10's.