So it sounds like one part tires, one part programming, and one part timid driver = failure to get up the hill. Two thirds of that equation seems to be lack of familiarity with the vehicle and how to use it properly. This is why I like my command trac. It’s either in 4WD (4Hi or 4Lo) or its in 2WD. Not that I necessarily think it’s better...just less to confuse my night shift brain.