Need info on transfer case please

[onestar]

92 yj with a 4 cylinder. Does this Jeep have a np 231 transfer case in it? what spline? Where can I find one? Thanks!

 

[paradisePWoffrd]

it should have a 21 spline Np231 in it... you can check on here, local junkyards for one... if im not mistaken, the input gear will interchange between the 23 & 21 spline ones, so you can get any np231 as long as you have the 21 spline input from yours