Definitely confirmed it fits and works. No wheeling planned to test the LSD as the front diff will explode. But for non-warranty rear diff replacements or for those still afraid of the upgraded 4 spiders locking gear, this is an economical solution.
The Nissan diff is in the truck, maybe I can photo it later. Basically the teeth stripped off one side of each spider gear. The mechanic is writing a report to kick off a lawsuit, I will post his complete report here.
I called Eaton(those guys are easy to work with) and told them 05+ Xterra Off-Road or Manual transmission for the Trac Loc app. And yes, you just bolt on your stock R&P just as you would an ARB locker.
So it fixes exploding diffs while offering a quality LSD AND gives a traction aid to open diff D44 guys that have no other option currently.