That's kinda what I thought. It didn't make any sense not to be able to tow with all four wheels on the ground.
Foxbat: I know all four wheels aren't going to turn at exactly the same speed all the time. I'm not a fool. I was mostly referring to the potential damage of towing a car with a traditional (i.e., two-wheel) tow truck or some similar device (like some towing apparatus for cars).