Being a new-to-you trailer this will require some fine tuning. My Jayco with a gross of 9500 chucked badly when I first got it. This was with my ‘01 Ram dually Using either a Reese 15K Pro or Reese 22K hitch. Added shocks and a 5th Airborne pinbox that helped a lot. Still chucked on the westbound end of the old Tappan Zee though to the extent I almost got car sick.
Anyway same trailer, same setup, either hitch but towing with ‘15 RAM dually, very rare to chuck and is usually the road surface where maybe slowing down or speeding up a little helps.
All that to say you will need to tweak your setup to get into the sweet spot for towing comfort.
Best luck, this is all part of the fun!
