There is probably lots of China parts or Japan parts, maybe even India parts for all we know. Consider every country that is moving into the industrial world, that has to be where many of our parts come from, we either outsourced them or trained them to replace our industries.
Yes, there are LOTS of the sub-standard parts on our very expensive trucks. If they built them with quality parts we'd have no need for the aftermarket that we all have become VERY familiar with. Yes, when you go in for a warranty item you are just getting a new set of sub-standard parts just like the first ones, but it is your contractural right to get them, and, to continue the merry-go-round until your warranty is done. Then, you will seek the aftermarket for the better quality parts you should have had in the first place, or maybe better stated, you will get the kind of parts you paid for and expected when you bought your truck.
Outside of some major item that is engine, transmission, or axle/drivetrain related, I think I will just save myself from all the junk parts and do the better aftermarket stuff as I need them. I figure that any better quality part than the original is worth my time and money to just plain end the merry-go-round of junk parts. It used to be that when your vehicle got older junk parts might have been the better idea, but their downfall was that they were just as used and old as the one of yours that broke. Now it is pretty much the same with the new parts as they are junk from the start.
From the warranty standpoint, if I have gone to something better than the stock junk that keeps breaking, and DC tries to void my warranty because I made a better choice than the original junk, they will never see my business again and they will also come face to face with my attorney cause I will be like an immovable object.
As for your vibration, you have several good suggestions from the posts before mine. I would give the dealership 3 good tries to solve my problems, and make certain that all of them were done with their paperwork. Then I would move on to someone who has a really good shop and solve the issues at hand. You cannot be expected to live with incompetence and vibrate your truck apart over time waiting for them to fix it or run out of warranty and be done with you. It is at this point that you will have moved into taking care of the problem by yourself anyway, and the problem might be bigger in the overall because vibrations are hard on everything. I then would go after the dealership or DC to reimburse me for my repairs. It could be futile or tedious, but by the time everyone complaining about this stuff did it over and over, they might just move into taking care of people the first time and recognize their engineering problems.
CD
Attention: TDR Forum Junkies 
