This is very sound advice if you have a Dealership you can trust.
I have had such a hard time finding a Dealer in Central Pennsylvania whom wants to be fair... even the one I purchased the Jeep from.
I'm not an anti-Dealer kinda guy as when I lived in Illinois, I had worked for both a Ford and Toyota dealership as a tech and saw the inner-workings of those two particular dealers. Both were quite fair to their customers regardless if they purchased their vehicles from there.
My dilemma is the Dealership I purchased my Jeep from, gave me a quote for $2000 labor + parts & fluids to do my differentials. That is over $1000 more than the offroad specialty shops in my area that do Dana differential swaps regularly as SO many of us opt for installing bigger tires for offroad use.
Needless to say, I took to one of the specialty shops and they charged $1000 labor to install new Yukon gears with Timken overhaul kits and they will warranty the labor for the duration I keep the vehicle.
Again, if you have a Dealer that has proven to be honest, it is highly recommended to build a long-term relationship with them... but if you live in an area like me where they want to mug you every time you bring it in, you may be best suited finding a qualified private shop.