"Porpoising" - How to Tame the Rocking Camper
Struts are the only solution Lance parts representatives can offer for out of control forward and back rocking of a camper. Trouble is they don't support my 2019 Lance 650 on my 2016 Toyota Tundra (wi...
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The phenomena is a resonance between the vehicle inertia and its suspension, that shock absorbers can't stop.
Bingo. Regardless of frame flex, under loaded, over loaded, etc.
Assuming it's not just a way overloaded truck and the truck doesn't have worn out shocks, there are three easy things to do.
Change shocks, preferably to an adjustable shock so different settings can be tried. This will change the harmonic frequency.
Change you speed to adjust the rythem of the tires and road irregularities.
Change you COG by shifting weight forward/aft in the camper. This will change the loading on suspension components which will result in a change in the harmonics.
Even my rig which is 1,600#s under payload experience porposing at times, especially on concrete roadways and bridges. I just change speed to get away from the harmonic frequency of hitting the joints and the problem goes away.
