Need emergency 231 sye help.
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
IIRC yea, the same way as if you had to adjust the linkage however there is the piece that's internal that must also be in 4lo position when put back together. I know there is a link somewhere that has this info.
Thread Starter
Seasoned Member
Joined: Jul 2012
Posts: 312
Likes: 0
From: Little Elm, TX
Year: 1987
Model: Cherokee
Engine: Inline 6 cylinder
Alright guys, here is an update.
I had my mom shift the transfer case for me while I watched. Shift fork rod was not moving. Took off the rear half, and it didn't move. I had to guide it into the hole in the back half of the case. So, I think I'm going to have it in 4lo, put everything how it is supposed to go, then have someone shift to 2wd and guide everything into place. Then without sealing it put the rear half and output housing on, and put all the bolts back in, just to "mock it up," and have someone shift and cycle through 2wd-4lo a few times to check if its all working. If it all checks out, I will leave it in 2wd, then take it all back apart. Not touching any internals with it all working, I will then put gasket maker on everything and put it all back the correct and final way. Sound good?
I had my mom shift the transfer case for me while I watched. Shift fork rod was not moving. Took off the rear half, and it didn't move. I had to guide it into the hole in the back half of the case. So, I think I'm going to have it in 4lo, put everything how it is supposed to go, then have someone shift to 2wd and guide everything into place. Then without sealing it put the rear half and output housing on, and put all the bolts back in, just to "mock it up," and have someone shift and cycle through 2wd-4lo a few times to check if its all working. If it all checks out, I will leave it in 2wd, then take it all back apart. Not touching any internals with it all working, I will then put gasket maker on everything and put it all back the correct and final way. Sound good?
Thread Starter
Seasoned Member
Joined: Jul 2012
Posts: 312
Likes: 0
From: Little Elm, TX
Year: 1987
Model: Cherokee
Engine: Inline 6 cylinder
Also, here are some pics for ya'll to look at and let me know how everything checks out. I only removed the main shaft and didn't touch the two shift forks.
Here is the shift fork and hub thing:

Here is the shift fork pin and range selector pin with the cam:

Here is the main shaft with everything on it:

Here is the shift fork and hub thing:

Here is the shift fork pin and range selector pin with the cam:

Here is the main shaft with everything on it:

This might help:
http://www.pirate4x4.com/tech/billav...Case_NP231.pdf
Pg 12 shows the correct orientation of the main gear.
I always keep the t-case in 2-hi when installing an SYE.
http://www.pirate4x4.com/tech/billav...Case_NP231.pdf
Pg 12 shows the correct orientation of the main gear.
I always keep the t-case in 2-hi when installing an SYE.
Thread Starter
Seasoned Member
Joined: Jul 2012
Posts: 312
Likes: 0
From: Little Elm, TX
Year: 1987
Model: Cherokee
Engine: Inline 6 cylinder
So guys, long time no post. Well, good news. I got it figured out and fixed. Everything is working just fine, turns out the shift fork rod was the culprit. Also, assembly lube helped with, well, assembly.
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