In the time I have had my Rodeo, I have been through about 4 sets of shocks. I have Monroe Reflex's on currently, about 2 years old. The last change was because the back was bottoming out with even a light load. With the new shocks, I still seemed to have the problem. Honestly this go around, I can't tell whether its the shocks or whether my springs are worn out. How can you isolate which one is worn?? Thanks