I am towing a 2018 Montana 3731FL with a 2015 Ford F-359 SRW and have the same issue. I purchased AirLift air Bags to level my truck and I really like them. But, dips in the road and going over bridges are causing the same Bouncing that has been described. We are in the middle of a trip and are currently in Rapid City S.D. As soon as we get landed in Arizona my next move is Heavy duty shocks either Billstiens or Rancho. Really hope this helps as I worry about the health of my Monty and my Curt Hitch
