Ok I have done a search on this and have not really found anyone with the same problems, so I am going to post this and see what happens. My Durango is a 4X4 with the 5.9 and 120,000 miles. The problem I am having is when driving between 45-65 mph I have this bad rumbling noise that I cannot pinpoint where it is coming from. I have ridden in the back, in the front, hung out the window while my wife drove down the road and cannot tell if it is a front or rear noise. Anyway the sound does not start until 45mph and rumbles all the way until you get to 65-70mph and it goes away. It sounds like a bad tire but I just had new tires put on and it didnt change. I have read on hear about bad front bearing assmeblies but didnt want to change it out yet not knowing if this might cause this noise. Being my Durango has all wheel ABS the bearing is $160.00. I replaced the front right half shaft the other day due to the rubber boot being torn. I need to replace the tie rod ends, and when you jack up the Durango and grab the wheel at 12 & 6 o'clock you can move the wheen back and forth. Would this be the tie rod ends or the bearing assembly and could this cause this noise? Sorry for the long post and any info would be appreciated.