In the US, the 90-95 Pathfinder used the H233B rear axle with 31 splines. There were a couple of variations, disc brake and drum brake versions used different axle shafts and bearing retainers. The LSD and open diffs used different carriers. Finally transmission determined if the final drive ratio was 4.3:1 or 4.6:1.
Somewhere along the line between 1987 and 1995 the H233B in the WD21 gained 2 more studs for mounting the center section, but I have heard it isn't a big deal.
All this information is for 4wd WD21
All that said, disc brake versions usually had LSD. Drum brake had either open or LSD depending on options. 4.3 gears were found in manual transmission and 4.6 was auto.
Years ago my 93 SE had its original equipment LSD and disc brakes. I liked it but wanted more. I had a friend that had a 95 XE with drum brakes, and he wanted a bit more as well. Both trucks were autos so had the same 4.6 gears. I bought a Lockright and the night before a Moab trip we swapped out the center sections of our rear axles. I put the Lockright into the open diff, it was very easy and simple and bolted in the center section into my disc brake axle. 18 or so years later, I am still driving with that same setup. Works fine.
The LSD center section went into his drum brake axle housing fine, but we did make the discovery later that we had to add the spacer block I took out of his old differential carrier into my old LSD carrier to keep his axle bearings happy. After we got back from a week in Moab we did that and he had no problems for the couple years he had his truck.
The Lockright was inexpensive and has been completely reliable in my truck running 33x12.50 tires, VG33, and an idiot behind the steering wheel. It will only fit the open diff, but it is a simple install and does make a noticeable difference over a LSD, even a healthy tight one like mine was.