2004 Excursion 6.8L 4x4, Standard 16.5" Goodrich T/A A/T's: Christmas 2004, 18" on the level on a Northern Michigan 2 track for 1.5 miles to my cabin. No chains. I had to periodically get out and shovel the pile of snow I was pushing with the front end to keep from packing the grill/radiator with snow. I was breaking trail for a buddy with a ~2000 Chevy 4x4 1500 P/U..half-way through he twisted off his Transmission output shaft. I left him, went to the cabin, unloaded my gear, came back to pick up his family and gear. The next morning we managed to cut enough trees for me to get around him. I towed him out butt first. Should have made a Ford ad. There's no substitution for good tires, road hugging weight, and patience. I loved that beast.