yeah There is a difference in load ranges. every "D" tire I had funny tire wear.
I hope you didnt pay for all that stuff. i would have made the dealer pay for some of that crap. But it sounds like you have thrown some coin.


please describe you symptom better and I can help you.

I could be a mild form of death wobble because the caster or camber

 

If you have checked all steering components and it seems you have i would recommend that you first rotate your tires to see if you may have radial pull from a tire. if this is ok, I have read about, but have not used myself, a steering box stabilizer from BD that will hold your steering box from flexing. I experienced this pull on a truck I had, I tried the tires in different locations until it drove the best.

 

Hav the same problem and i have replaced the balljoints and axle u-joints a while back so i knew that wasnt it but i re checked them just to make sure. It seems to be a tiny bit of play in the center link. I still cant belive how all this crap is going to the nongreasable crap, its just so they can sell more parts. But most of the HD dodges i have drove and 06s like mine all steered like a turd with some miles on them.

 

I was starting to wonder about mine but after having the tires rebalanced and rotated no more wandering like I had while driving in my lane.