If you are having a problem with your coach swaying, you should contact Freightliner. It might just be a simple ride height adjustment or something loose causing the problem.
On our previous '03 36' coach with XC chassis, the swivel joint on the right rear ride height valve came loose. This caused the coach to feel like it was swaying when a semi would pass or sidewind due to the fact the valve level being loose allowed the coach to "roll" before the play in the swivel joint would control the air bag on that corner.
After the loose swivel was found and tightened, the "sway" was gone. Handling like a dream then.
Gulf Stream RV Owners Forum www.gsowners.com