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
That's it I'm not buying one of those RAM trucks now they have changed engines:
"...when compared to the new Heavy Duty Chevy Silverado 3500 Duramax and the Ram 3500 with the Cummings Diesel. In another TFLtruck matchup review ... "
I'm still waiting for the test that includes the fuel used...