Also it depends on what kind of tires you have, ours came wit cheap "duro bias ply" tires our trailer had a lot of sway with those tires , I switched to radials and that made a world of difference.
Also like other posters mentioned, be sure to load your trailer properly, put some weight to the front.
2008 Jeep Grand Cherokee,Laredo, auto, 3.0L diesel
2005 Chevrolet 1500 silverado 4x4
2010 Shadow cruiser 195WBS