- Location
- Southwest IN
You're going to need a planetary gear set out of a NP241. 231s never had more than 3 planetary gears in the XJ/TJ/ZJ platform.
http://www.pirate4x4.com/forum/jeep-non-hardcore/1503778-np231-full-upgrade-build.html
http://www.pirate4x4.com/forum/jeep-non-hardcore/1503778-np231-full-upgrade-build.html