Yeah cross wind will cause sway too.. I was just pointing out the main cause of the problem that we can control...if you get sway just manually activate the trailer brakes with the controller it will straighten everything back out...
A lot of the Excursion folks seem to really praise the Roadmaster Active Suspensions setup for improved towing http://www.activesuspension.com/
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DJ Phoenix (my modded) Hi-1200/240Tow/75FS/80DD/100/140SS +Minotaur
ASE Master Auto Technician 
2001 Ford Excursion 7.3 4x4
Projects. 1970's Hustler and Max II Amphibious ATV's
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