Sorry to say it, but you need lots of new stuff. That plate between the springs ? Someone already added to it to stiffen it up. Whoever had it off or the spring out of it put the bolts back in the wrong holes. Likely you need saddles, spacers new springs U bolts and the side to side torque rods. These have been known to last only a matter of days in a dump truck sometimes (torque rods). This really isn't crazy expensive and it's easy to do if you have torches, jacks and a big impact wrench. Then there's the nylon wear pads hide'n in the front spring hanger. Spring needs to be able to slide to work or it just accelerates the wear of everything else. No easy tighten something up here.... you're spend'n some money. And if asked, get parts for AL46 ( the spring is thicker and is better for a dump application ). Sometimes you're better off getting a bigger torque rod for the side to side than comes in the truck.. like one of those weld to length but ???? gotta watch it'll fit without hitting the carrier. Someone pointed out the side to side rod may be bent (and it might) If it is and it's the one called for by the VIN, then the rest is worn allowing it to travel too much. It also looks like some genius removed the rear shocks. This suspension needs shocks. They stop it from over traveling .