Transfer Case Questions

[CONKLINATOR]

I am looking to convert my '89 2WD AW4 to 4WD.  I found a pretty good NP231 for sale locally, but it is out of a 2000 XJ.  Other than the output shaft, are there any issues I will run into trying to swap in this t-case, or am I good to go?  Just want to make sure before I make a purchase.  Any advice you guys can give me would be much appreciated!

[64 Cheyenne]

http://comancheclub.com/topic/38510-wtb-ax-15-transfer-case-shifter-linkage-mount-mobile-al/

[CoryMJ89]

As long as u have the correct tranny should go together a 23 spline bc that 2000 tcase is also a 23 spline

[mvusse]

2000 might possibly have the spiral input shaft. Remember hearing something about that somewhere, but can't remember where. Might even have just been a bunch of bull pucky.

 

Early year AW4 needed a 21 spline output, then they switched to 23 spline somewhere around 89 or 90, I think. Again, can't quite remember. 91 and newer transmissions, even with the correct TCU for the year, will not work with 90 and older electronics without wiring modifications.

 

So for that transfer case you will need a 90 or older AW4, but with a 23 spline output. Again, I don't know what year they went to 23 spline, so it may not exist.

 

Best bet I think is to get a 87-89 AW4 with a transfer case already attached.

[cruiser54]

I think it might have been late 90 or 91. Pretty sure all 89s had 21 splines.

[CONKLINATOR]

Thanks for the input guys... I am thinking it's not going to work, but I will probably take the tail housing off of my tranny and take it to the guys house to make sure it matches up before I go spending 200 bucks on a t-case.  

[CoryMJ89]

They wet to 23 spline in 91 I'm pretty sure bc that's when the changes happened 90 and older was Renex and had 21 spline

[64 Cheyenne]

Ya can't just take the tail housing off of your tranny...won't work, mainshaft is too long period.
You have to have a tranny that is specifically in front of a TC.

Suggest you source them together so there is no issues.

[mvusse]

No transfer case will bolt up to your 2wd transmission. You need a 4wd transmission. As said before, best way to do it is to get a 90 or older 4wd AW4 with the transfer case already attached to it. That way you will know it fits.

[64 Cheyenne]

No driveshaft will bolt up to your 2wd transmission. You need a 4wd transmission. As said before, best way to do it is to get a 90 or older 4wd AW4 with the transfer case already attached to it. That way you will know it fits.

 

You mean transfercase?

[mvusse]

 

No driveshaft will bolt up to your 2wd transmission. You need a 4wd transmission. As said before, best way to do it is to get a 90 or older 4wd AW4 with the transfer case already attached to it. That way you will know it fits.

 

You mean transfercase?

Doh! :dunce: 

 

Yes,I mean transfer case. Fixed in original post.