TFL Truck tested them all towing 12,000# 5ers at a Ford press event. All 3 had 3.73 axles according to Ford. VIDEO Time to climb the 7% grade: Ford 2:36 Ram 2:45 Chevy 2:50
Actually, I would believe that torque has a bit to do with this test as well. I realize HP is great, but going up a grade like this call torque into play as well?