Thanks for the reply. I don't live in that area, but I'd give that shop a try if I did.I can tell you first hand that my 2014 Dodge 1500 Ram Express also came with an open differential. I'm lucky in that we have a great Rear End shop here in town that does all the dealer diff repairs and so forth.
So I had him research putting in an lsd because I have a 7000 lb race boat that I needed to pull out of the water and I was concerned that an open diff would just spin on the ramp.
So, for the 2014's the only lsd available as of 1 month ago was the factory unit. I had that installed and everything is great! I don't know where you are in the country but if you want to call this guy out here in Lake Havasu City, Az the shop name is Gooley's. You can search online at google and get his number. The owner and only employee at the shop is Gooley!
The Auburn differential I am referring to can be found on the following link:
It looks like it should fit our trucks, but I could be wrong.