The truck itself isn't porpoising, the camper is on the bed. Rear bushings were replaced last year but with rubber. Tires are 65psi up front and about 72psi out back. Tie downs keep working loose somehow and it's really bugging me. That's what set me on the path to looking up how to maintain them and I noticed in that link above that I may just need to source the correct rubber/non-sprung rears to fix that issue. Below is a quote from that article:
In place of the linear compression spring that is in the front turnbuckle, there are rubber bushings inside the rear turnbuckles. Having springs in all four turnbuckles promotes porpoising, a front to back rocking or hopping that happens when traveling at speed or on uneven and undulating highways.
I am using a T in my airbags and my neighbor told me exactly what you're saying towpro. Since I don't have a controller for them, I may just open my wallet for a compressor setup that manages the bags individually. The bags themselves are brand new Airlift units.
I'm glad to hear the swaybar makes a difference. Have either of you also swapped the front? I intend to swap my single upper overload spring for the triple setup that GM offered on the cab and chassis trucks (not the HD version) back then. It will allow me to be less bag dependent and not affect my empty ride. I was pleasantly surprised to find that my truck wasn't that far off of how I wanted it to drive the day I brought the thing home. Duallies kick ass.
