Can anyone help me identify which assembly # my np231 tcase is. It exploded and the section that had the ID plate went MIA. Help!!! It has a 5.9 with auto, and its a manual shift tcase, gas engine. Thanks for the help.

 

What does it matter? You just tryin to find a replacement?

 

Just grab another from the JY. It will be a straight forward swap if it's from a '94-97 1/2 ton.

 

All the salvaged around here say there are 2 different ones and they do not interchange. Apparently the assembly numbers are the deciding factor. The inputs are w different lengths. One is 4.25", the other is 5". Have you guys heard of this at all. I really need to find one soon. Also, what is the electrical connection for? It has electrical, vacuum, and it has manual shift??? I am stumped, this is my first dodge. Thanks for the help.

 

You have an auto, so the input shaft is a bit longer than the ones that came behind sticks. Either will bolt up for you though.

 

That is awesome, thanks so much. The jy has been giving me a heart attack about this. I am tryin g to upload pics of the truck, but having fits getting them to load from my phone. I only paid 400 for the truck it has a little over 100k on the new 360 and trans, but the tcase was factory and has 200k on it when it exploded. I hope to have it done Monday. I pulled the pieces of the old one today, so just got to reinstall.

 

^^ Good luck! Stick around, you will learn a lot here.

 

I plan on it, thanks again.

 

Okay, I took the advice I was given, and dropped 450 on a jy tcase out of a 1996 halfton automatic. It doesn't fit. The output shaft is roughly 3/4 inch too long and they won't take it back. Is it possible to swap the output shaft from my old tcase??

 

Yea as long as there is no damage done to it from the previous incident.