Look at my hitch set up please....

lukenick wrote:
Is that why when a tractor trailer passes me on the highway it sucks me right in?

In addition to the suction caused by the airflow just in front of the tractor trailer, the tractor trailer passing you produces a "bow" wave similar to the wave produced by a boat moving thru the water.

As this "wave" hits the rear side of your TT it moves the rear of the TT away from the semi, this turns the front of the TT toward the semi which in turn pushes the rear of the TV toward the semi and the front of the TV toward the shoulder of the road. Then a second or so later the semi "bow" wave moves forward and presses on the front side of the TT and the same process repeats in the opposite direction. While all that oscillating action is taking place, you are trying to counter steer and I guess you get the idea.

Try not counter steering too much and it will help reduce the action a little. Pay attention to traffic overtaking you so you are not surprised by it. Anti sway devices help reduce the severity of the oscillations caused by the "bow" wave pressing on your rig by helping the connection between your TT a TV remain more rigid and resistant to the side forces.