I have a 2.5L that had Death wobble for the majority of the years I've owned it since 2005.
I was finally able to get rid of the wobble last year by getting new tires, upgrading my trackbar to one that is beefier, I got new rough country steering stabilizer, and new upper/lower ball joints. The drivers side steering knuckle had so much play....and could easily be turned by barely touching it. I immediately knew this what the root cause of the wobble. As a kid, I had sh*t mechanics for years never properly diagnose it, and it finally after growing up....teaching myself how to be a mechanic...I figured it out.
Get Spicer ball joints.