6.0 vortex chevy ext cab 4x4 2500hd 2.73rear end

[Johnnyg]

Our 2008 f350 diesel has 3.54 differential. I feel it's a Little sluggish out of the gate and runs on the Low side of the rpm torque curve at highway speeds. As a result it upshifts more than some with lower gears. The mileage towing is around 8.