Hey everyone, I have a 91 np231 transfer case and a 2000 AW4 transmission. Will this work? Long story on why everything is mismatched but anyhow. Someone must have upgraded because the transfer case is 23 spline already, but I have heard something about the spline pitch being different between early and late model 231’s? How can I check that out? Also, I no I’m going to have an issue with the speed sensor in the 231. Is there a kit to swap it over to the electronic so my TCU will know what is going on? Thanks in advance!!!