one of ur shocks might be worn out thats the differance ur probly feeling either that or the torsion bars are worn out
The po said every thing is new and from the paper work i got on the truck it is, when i got the the truck the po had the torsions all the up and it road like

i let them down some and it helped a lot as far as the ride, just trying to find a good balance to it. The torsion are new once again from the paper work.