I think I solved Porpoising Problem
Being new to towing a TT ( hadna 5th wheel), the porpoising of my GMC HD 2500 was driving me crazy. Trailer weighs 8000 pounds and with the WDH set up by the dealer, the whole rig rode like crap. It ...
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I've experienced porpoising crossing Nevada's mining lands along 80. Trailer was light, almost empty, at about 4K to 5K. I ran the lightest bars I had for sway control 1,200. Tongue was less than 1K. I didn't bother to measure it, as I was towing with my 550. Horrible porpoising. Pulled over a couple of times, it was so bad. Right between 43-47 mph it would start. I was trying to drive 55, just couldn't push through the bouncing. Reminded me of those low riders that cruise the barrio.
My point is, I don't know that heavier rated spring bars is the universal solution to porpoising. i didn't need spring bars at all, I just had them for the dual cam sway.
I had Rancho 9000 shocks, and only about 20K miles on them. I changed the shocks anyway when I made it back, to the newer XL models. Ruined two tires... well, feathered them severely. One blew out later, so whatever.
Not entirely sure why the porpoising in that one stretch of roadway, and not the other 1,500 miles of the trip. I think it can be the road sometimes.
It can be an elusive problem to solve.
My point is, I don't know that heavier rated spring bars is the universal solution to porpoising. i didn't need spring bars at all, I just had them for the dual cam sway.
I had Rancho 9000 shocks, and only about 20K miles on them. I changed the shocks anyway when I made it back, to the newer XL models. Ruined two tires... well, feathered them severely. One blew out later, so whatever.
Not entirely sure why the porpoising in that one stretch of roadway, and not the other 1,500 miles of the trip. I think it can be the road sometimes.
It can be an elusive problem to solve.
