I flat towed (towbar) my wifes lifted Jeep Wrangler behind my Hummer for about 1200 miles round trip with no problems, had the cruise set between 70-80 most of the trip, there was some places during the trip I was running closer to 90. I did use the tow/trailer option setting when I was at lower speeds in town where I was dealing with traffic and redlights but on the interstate I did not. I did the 600 miles down in one day and returned over the same 600 miles in a day a few days later, both driving days the weather was hot and humid with temps at or over 100 degrees and had no problems at all with the truck, everything ran well within normal pressure and temps. Now I did have to replace the fluid in my wifes front differential as it heated up and foamed out on me but hey its a Jeep what did she expect
