What is involved in swapping a NP231J that was behind a AW4 Cherokee to a 97 Wrangler

[91MJ97TJ]

I am thinking the tailshaft would need to be changed of course. My 97 Tcase took a crap and I found a Cherokee one but not sure how it fits and what is involved to make it work.

Oh yeah AX15 transmission installed on the Wrangler.

 

[Herzog]

What year is the Cherokee t-case? My concern would be input spline count. Betting you need 23 spline. Check the donor case to see what the count is. There's possible input shaft length differences as well.

 

[Herzog]

Here is some good info:
http://www.novak-adapt.com/knowledge/np_nvg_input_gears.htm

 

[91MJ97TJ]

It is 23 spline both are from a six cylinder. Thanks for the link.

It is from a 99 Cherokee.

 

[Devel]

it should bolt right in, you might have to swap the 4wd light switch but thats about it

 

[91MJ97TJ]

Ok so maybe I am reading this wrong but my Tcase is a post AX15 so the input gear protrudes 2.1". The other Tcase comes from a Aw4 Post '90 so that means it is a medium input and is 1.7".

This could be my issue in having it bolt in. Anybody have experience doing this?

 

[Herzog]

If there's enough spline engagement, you could trim down the input shaft a tiny bit. You just don't want it to bottom out, that's what cause problems. I think they make a spacer ring for this issue as well.

 

[91MJ97TJ]

I don't think I need to trim it because the one I want to install is smaller. I think just simply swapping the input gear is an option. Haven't read anything about spacers rings at all.

 

[Herzog]

When I did a tera-low many moons ago, I remembered having to use a .40" spacer ring because the transmission output shaft was too long. However, that was quite a while ago.