Anyone Have Some Info On 06 Speedo Calibration Yet? Im Tired Of Not Knowing What Fuel Milage Or How Fast Im Going. Speedo Is Off And Overhead Is Off So A Cant Even Hand Calc Unless I Take A Gps With Me. I Guess Its My Fault For Spending Extra Money On Fancy Gadgets Like The Over Head Display And Wanting Them To Work Correctly. Oh Well I Still Love My Cummins. Not Too Impressed With The Body.