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-   -   NP231 from 92 XJ on 92 YJ? (https://www.cherokeeforum.com/f2/np231-92-xj-92-yj-274985/)

CherokeeFrenchImports May 19, 2025 09:48 AM

NP231 from 92 XJ on 92 YJ?
 
Hi, I need an NP231 from my 92 YJ with an AX15 4.0L completly stock? There is a 92 Xj with an AW4 4.0L with a np321 in my local yard. The guy said he will give me the T-case for 100 bucks. My question is, will it bolt right in? I know I need a 23 spline, and that XJs after 1900 are 23 spline correct? Any difference between the auto and manual? Will the bolt patten in the gearbox be completly the same? Heres the photo of the the 100$ tcase. Thanks in advance for your help guys.

https://cimg7.ibsrv.net/gimg/www.che...960cc6a9ba.png

lawsoncl May 19, 2025 08:14 PM

The bolt pattern on the YJ version of the transfer case is clocked a little clockwise,15-degrees I think? So that XJ 231 will bolt up but the drivers side will hang lower if installed in a YJ

Phydeaux33 May 20, 2025 06:02 AM

Lawson is correct on the clocking, if you are able you can redrill to match the clocking. I have done it moving a yj to case to a xj.

CherokeeFrenchImports May 21, 2025 11:47 PM

Ah I understand, it will hang low and i wont be able to get the skid plate on, thanks for your help guys. I dont think ill redrill, knowing myself it wont end well, will look for a YJ Tcase

That Jeep Guy XJMJ May 22, 2025 09:35 AM

Quote:

Originally Posted by CherokeeFrenchImports (Post 3730188)
I know I need a 23 spline, and that XJs after 1900 are 23 spline correct?

ive never seen an XJ from that era.... plz share pictures if you have them!

lawsoncl May 22, 2025 09:39 AM

I've seen plenty from the 1900's. The XJs from the 2000s all had problems with their heads cracking. :}

Mortgage Payer May 24, 2025 10:04 AM

The ones I've seen from the 1900s are horse drawn.


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