Same yr/model as yours . I towed over 10K miles coast to coast with a F150, 5.0, 3:31 rear gears, tow package, Duel cam WD hitch, Timbren's on back, stock tires (235/75-17") loaded RV weight: 6,000lbs, Loaded truck: 6,100lbs. Slow go over high mountain passes & getting onto hwy otherwise okay, If I had 3:73 gears I might be happier, Never saw a change in tranny temps or engine temps in summer months. Good gas mileage on east coast flats 11.5-13mpg when towing & 19-22 mpg not towing, depending on wind. Mountain towing avg 10mpg's,
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