I am currently stuck in Brick NJ. I removed the front DS, checked the front Diff oil, (it needs replaced its at 90,000 miles, but full). The vibration is still there, is there any possible way a tire is outta balance? I have never had vibrations like this from tires, but hey maybe? I am going to prob have to take the truck to a shop and have them lift it and inspect the front end, if its bad... I'm calling the district manager again.... since its bad that Firerock can't do an alignment on my truck, so they cant fix my truck here correctly all the way to the finish.... sigh ...

 

Finally found it ... broken rear DS u joint, thats the 3rd set in 30k miles, what is wrong with those fraken things?