Big Red F-150 wrote: The TT is a 04 Fleetwood Wilderness,front bed, rear bath. I think it's called "porpoising" ? It's not good driving the Motor capital of the worlds roads. Who would figure? Would the HD shocks and load tires be on a F-250?
If you are referring to the sway motion feeling going back and forth "porposing" effect, either weigh your TW and get more weight there if to low or try going up one link on your WDH.
You will have to do weights to find out about this stuff to help. I did and fixed the "porposing" I had by adding more TW and going up one more link on my WDH
Hope you fix it. I hated the feeling but glad I did the weight and math