Sorry for adding even more complexity into this conversation, but there is one more thing to think about. That is the "Levelness" of your tow bar. If it is not level, you will get "tow-vehicle-bucking" while driving. The greater the angle, the worse the bucking. Using Quiet Hitches at every connection helps but does not resolve the problem. It only masks it. Leveling the tow bar eliminates it.
My picture here shows the "Condition To Avoid" of which I tolerated a lot of bucking. Note the tow bar is low at the PC and high at the Jeep Liberty. This was the day the light bulb went off inside my head and so I took this picture while on a trip.
In this picture taken a few years later, I added an offset receiver to level the tow bar. "Cumulative Play" with the extra connection required Quiet Hitches at both interconnects. This setup also required longer blue safety cables. 100% of the bucking was eliminated here.
If you think about it enough, it will make sense. Every bump in the road changes the "vertical" relationship between tow vehicle and motor home. An angled tow bar with out-of-sync vertical movement between vehicles changes the distance between them, just enough to cause that horrid bucking. A horizontal bar would cause bucking only under every extreme conditions. But then I think you would have something much greater to worry about, like jumping a curb or worse. Getting the bar perfectly level is ideal, but getting it close works too.
I may stick this as an independent thread in the Tips & Tricks section.
