You can try a stiffer rear sway bar. I did that and the konis set to max rebound and it got a lot better. You're right, it's just nuts stock. The swaybar helped a lot. Most of them come with poly bushings so you will get some squeaking. I got the one that bolts in, no drilling. Sorry, forget the name. This on my 04 2500.My van rocks violently when I hit bumps diagonally. Almost shakes my teeth out!