Since so many of us are using the NP-231 transfer case in our TJ's/YJ's/XJ's/ZJ's etc.... I figured I'd start a thread with some tech on this case.
Its mainly a starting ground for ideas for my own build, but feel free to add your own writeup or tip to the list, I'll edit this post to add the topics as they get posted.
TOPICS COVERED SO FAR:
1. Widechain conversion
2. Adding more planetary gears for strength
3. Doubling your 231 with another 231
4. Swapping a 231 or 231HD into a ZJ
5. Typical failures/weaknesses