2009 RAM 2500 Wheels Problems

We have experienced the "death wobble" twice now in our 2009 Dodge Ram 2500. It is a documented issue with Dodge trucks and associated with multiple prior recalls. At highway speeds, the vehicle suddenly begins shaking violently and uncontrollably, causing the driver to lose control of the vehicle. It feels like the front axle just broke in half, but the problem is difficult to diagnose. The first time it happened, the truck was almost due for inspection, so we took it for an inspection hoping that the cause would be discovered/repaired. The shop replaced a ball joint (left upper); we were hoping that was the cause. After it passed the state safety inspection, I took it out on the same stretch of road where I had trouble earlier and it seemed fine. Then, a few weeks later, the death wobble struck back - this time with my wife driving and...