DW can be caused by anything, and everything. My 04. 5 never had it until 125k miles when i switched to pro-comp tires. A lot of people had good luck with them, i have not. went to Nitto's and have not had a problem since. I have nothing in my steering or suspension that is Dodge and I had it happen, it really just depends. It seems as if our trucks find something they don't like and all h3ll breaks loose. I always love the posts that say "death wobble cured" or something like that. They should read, "cured for ME". My point being is what works for some won't necessarily work for anyone else. In your case Pete, i say tires, tires, tires. how long does your truck sit between drives? There's no worse feeling than having the wobble hit ya, I wish i could help you.