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
When we brought ours TV I wanted the Ram-cheapest DW didn't like the interior DW liked the Chevy but at E-O-Y clearance they only had "Black" and I'm too lazy to keep one clean so we got the Ford, "Polar White".