OK, my truck had nothing in the way of flex in the rear when I bought it. The goal I had in mind was to build a rig on a budget, so I didn't have any plans for Coilovers or anything like that. What my truck did have was a mix of the Stock sping pack and a set of NWOR lift springs, ! Talk about stiff!! That combo allowed for about as much flex as a Shopping cart would have, it was BAD.