I've seen many Jeep 4x4's towed with all 4 wheels on the ground. I asked someone about this a few years ago and that was one of the reasons he got a jeep because he could do this without issue. He mentioned that you couldn't do it with others. I never questioned him about why jeep and nobody else, but I do believe he was giving his honest thought based on his research. I'm sure any dealer could give you an answer in a hot second.