I experienced trailer sway which caused a fishtail in the rig. Tires were set to 40 psi cold. Tires are Cooper discoverers but not ten ply.
Upon investigation I need to double check the wd hitch level. I ordered a friction sway control and gas magnum shocks.
I am taking the whole rig to the local RV dealer I use and they will weigh the trailer as towed and my tongue weight.
I hope this will yield positive results.
The heavy suspension mods were posted on sites where most rigs are diesel Excursion which probably exceed my needs.