Originally Posted by Carol H
Floyd answered this well but I would simple like to add that all trailers if set up correctly, stowed correctly and matched to the right vehicle should tow just fine without a anti-sway devise. If it does not then something is very very wrong and it needs to be fixed.
An Anti sway bar should simple be added as an extra insurance policy in the event of a one off situation that results in a big wag. If it actually will stop a big wag in an emergency one off fast maneuver situation is a whole different story
Again "just fine" is subjective.
Last winter we were on our way to Sebring. Driving on I-24 in TN, traffic was down to one lane at about 30MPH. The left lane and the shoulder had about 8-10" of refrozen snow. We were doing fine until a tractor-trailer decided to pass the line of traffic. When he got his tractor just passed our rig, he started to loose control and decided to take back our lane.
He forced us off onto the shoulder which was extremely rough. In a moment he had cleared our truck. I returned to my lost lane but only after suffering the worst sway I had ever experienced, as well as having the rear of my truck slide and requiring correction in both directions.
After the trailer had wagged back a forth hard enough to blow the end cap off my bumper, ejecting my sewer hose, we were able to continue without further incident.
Now whether it can be proved or not, I strongly contend that my friction sway device was instrumental in saving us from a catastrophe.
Of course it is flattering to argue that it was entirely due to the right tow vehicle perfectly matched to a correctly set-up trailer and superior driving on my part
but the sway bar adds an additional margin of control when all of the above is just not enough.
Still I like the sway control for the small additional comfort it provides when driving on a dry roads on sunny days.