I have a 2wd 2002 Xterra 3.3L 6cyl with no supercharger and an automatic transmission. I went to the local U-Pull-It and managed to get the rear axle for a 2003 Xterra (after confirming it has an LSD by spinning the wheels; of the three 4x4 Xterras in the yard that day, it seemed to be the only...