Dave, I have a Dodge 3/4 ton shortbed w/Cummins diesel. I tow a '73 31' Airstream International Sovereign LandYacht (2 axles) w/o any special hitches or levelers, sway braces. It's as stable as a "Rock", pardon the pun:>). I've never had a problem being passed/passing 18 wheelers on interstates. MPG drops from 23 to 15. DanD