When you hit a hump in the road it feels like the rear-end bottoms out. Come to find out the swaybar hits the lower torsion bar. It has now wore a hole on each side. I just changed the sway bar links and each torsion bar. It still bottoms-out. I guess my next step is changing the rear cargo springs and checking/changing the rear shocks. If someone has the same problem please advise. The dealer is no help.