One other thing just replaced on my 01 with only 35,000 miles on it was the intermediate steering shaft. I had the same problem described and a new tracbar was put in at 28,000 miles. Then at 35,000 I was not happy with the steering again so under warranty, they looked everything over and tracbar, ball joints, steering stabilizer, etc all were "within spec"... but the intermediate shaft was NOT. I already have the DSS. I would suggest trying the intermediate steering shaft. I was pleasantly surprised how much better it feels... not GREAT mind you, but I don't believe these trucks really feel GREAT... just better than before. 
