Mud truck gearing

I haven't ran it on the new motor. The old stockish 460 didn't have enough to shift to 3rd, so those figures are strictly based on a gear calculator with my combo.

Oh ok I understand.

I did go back to the calculator and saw that if I leave it in 4lo, shift to 3rd on the c6, at 6800rpm on 38.5's then it gives me a wheel speed of 97mph. But in high range with the 5.13 gear at the same rpm and tire I get a wheel speed of 151.9

Thats a big difference if the motor has the torque to keep them spinning in the mud!