The 04 and newer Nissan Frontiers use a Dana rear with disc brakes. They are 63" wide. I'm assuming the Xterra is the same. Earlier Frontiers are drum brake.
The 2004 Xterra had disk brakes with 4.64 gear ratio.
Starting in 2005 most of them had 3.13 gear ratio.
The good thing is that the door jam sticker has the gear ratio on it. They are all limited slip.
Carl
