Either the second dealer is just good, or they are going above and beyond to demonstrate their superiority to the first dealer you mentioned. Probably a little of both; some competition tends to up one's game.
If this solves the problem, I would want to know why you keep having u-joints and carrier bearings fail at your mileage.

 

good to hear.... If they get your truck fixed, you might need to drop a box of donuts by the servie department for the techs and S.A....
Greasing the wheels usually goes a long ways..

 

I never had a U joint fail, up to this point. I had a carrier bearing fail once.. and it was replaced under warranty, then I had the u joints fail, which caused vibration, which in turn tore the rubber on the carrier bearing, again.. so it was all replaced.

If it fails again, it will likely do it when I am out of warranty, so then I will be on my own. I am still amazed that the first dealer told me I needed an entire driveshaft...
Scott

 

If the vibes come back, I'll be going one piece.. I just wanted to get it repaired again under warranty, since that's what I paid extra for when I bought the 7 yr 70k mile warranty. The problem I am seeing in my research, is that the one piece driveline is based on the automatic trans trucks, and the NV5600 trans does not have a one piece shaft that fits without modifications. I could be wrong though..
Scott