Suspension Noise problems of the 2011 Jeep Wrangler

Twice in last 2yrs my standard Wrangler has refused to shift into geer and made a winding noise. . Then stalled and refused to start for upto 10 min. It happend last fal with approx 2900 miles on it then again a few days ago with 4800 miles. . . Not sure why or what is cause nothing is wrong according to dealership garage. Also hitting any little bump for the last 30000 miles has made Jeep jump like the rearend is flopping to one side also hard breaking causes same issue. . All suspension parts are either new or newer. . Looks like someone tried to fix that issue and failed. . . I am afraid these issues will eventually cause an accident.

At approximately 3,000 miles I performed the first oil change. I found the drain plug, which is typically tight, to be loose. I was able to remove it with my fingers. At approximately 6,000 miles, I began to hear a clunking noise at low speeds. After trying to diagnose the issue for over a week, I finally discovered the problem. The upper anti-sway bar fasteners on the front suspension were loose. I torqued them back to specs myself. I am concerned about what other nuts or bolts may be loose on this vehicle. Jeep issued a recall for "loose suspension fasteners" for 2010 and 2011 models, but my VIN is not included. I believe the problem may be more widespread than Jeep has spoken it to be.