The reason they say that is because the zq8 package is for
handling, the springs are not heavy enough. I tow a 4x8
motorcycle trailer with my 2000 X I use an add on helper when
i do or the rear end sags. You can get a hitch put on at any
U Haul dealer and plug in wire harness from Pep Boys Auto
stores. Hope this helps you out. I have a roll pan so i use a class
2 frame mount.