I'm having a strange problem with my 2003 F250 6.0 Automatic. Just got a new 5th wheel trailer and the jerking is terrible. Took the whole rig back to the camper sales lot and they agreed. They started checking and what we found was that the "helper" spring is bumping on the rear end while the front end is still a good 2 to 3 inches away from the bump-stop. This is causing the axle to torque in a rearward direction everytime the trailer hits a bump and transfers load to the truck. Anybody had this problem before, and if so what did you do to fix it? Thanks for any ideas.
Bill