Hello,

I just received my Diablosport Predator U7152 tuner for my V10. I put in the 93 Octane tune, and it works great, however, I cannot adjust the Tire Size. The manual indicates that I should have an option entitled "Tire Size" and also "Axle Ratio" in the adjustments section, but mine doesn't have it.

Has anyone with a 6.8L Predator tuner been able to make the tire size adjustment?

Thanks
g

 

I'm about to try that today. Will let you know. The manual does say that not every option is available for every application. Do you have a digital speedometer? I think the speedo cal only works on digital ones.