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Np231 questions

Buddybliven

NAXJA Forum User
Hoping someone can help me out I have a 1996 Xj with a aw4 23 spline transmission I also have an np231 out of a 1990 XJ this is a 21 spline. My question is can I take the transfer case input shaft out and replace it with a 23 spline and install it into my 96 and if so what parts are needed to do the job any help would be greatly appreciated thanks guys.......

and I do not have the original transfer case got the rig without one
 
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