quote:The ONLY difference in 5.14 gears are at the 1990 model year. There were originally only gears for pre-90 diffs. AC sold a modified version of those for post-90 diffs, but a couple of years ago Nissan finally started making 5.14 gears for the 90+ diffs.
4.90 Xterra gears will go into any 90+ diff too.
Additional info from Brent: