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Old 06-09-2013, 04:58 AM   #1
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Transfer case... Anyone.. Anyone??

I can't get my transfer case to shift from 2h... I'd like to have an extra to stick in while I'm having mine fixed so i wont be without my jeep.... I can't find one anywhere in salvage yards!
1989 YJ 4.2 5 speed. Any suggestions??

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Old 06-09-2013, 05:31 AM   #2
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Your linkage is probably rusty if you can't get the stick to move.

If the stick moves, but you can't get 4h or 4Lo to work (front axle not engaging)

Check your vacuum lines to your CAD on the front axle.

There will be lines going to the CAD, and the transfer case also.

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Old 06-09-2013, 05:34 AM   #3
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I took the linkage off and still couldn't move it... I have the cable that locks in the front... My jeep is an 87, I don't know why I put 89... My bad
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Old 06-09-2013, 05:36 AM   #4
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I took the linkage off and still couldn't move it... I have the cable that locks in the front... My jeep is an 87, I don't know why I put 89... My bad
I tried to shift the transfer case by hand after I remove it from linkage
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Old 06-09-2013, 08:24 AM   #5
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Hmm.. well mine was pretty hard to move when I got it.

I had to spray the linkage with PB blaster, bang on it with a hammer, and have a buddy yank on the stick.

Once it got loose, it works like a charm.

You may want to try rolling your vehicle a little bit, or put it on jack stands and rotating the drive shafts and try it again.
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Old 06-09-2013, 04:59 PM   #6
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I've tried everything but the hammer... Ha Have you ever rebuilt one? I may try to BING it
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Old 06-09-2013, 05:43 PM   #7
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transfer case

Can you not take a transfer case out of a jeep Cherokee from a similar year or close to it?
Seems like I remember that just look for an NP231 like yours or better yet climb under it rub the dirt off the tag and write it down then go to junk yard.

You can not swing a stick with out hitting a Cherokee around here hell I stepped over one in the junk yard on Friday just laying near the car.

let me know if I am over simplifying this
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Old 06-09-2013, 05:58 PM   #8
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I believe you will have to clock the Cherokee transfer case. Not the right angle.
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Old 06-09-2013, 06:53 PM   #9
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I believe you will have to clock the Cherokee transfer case. Not the right angle.
I was afraid of that .. I checked for a plate to see which transfer case it was.. No plate... Just a number... Any suggestions?
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Old 06-09-2013, 07:32 PM   #10
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I have rebuilt a couple of NP 231s. GM versions, but that was YEARS ago.

I could do it no problem if it was here in front of me.
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Old 06-09-2013, 07:35 PM   #11
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If you get a different transfer case make sure it has the same number of splines. They vary from year to year and cherokee to wrangler.
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Old 06-09-2013, 07:45 PM   #12
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Ritchie

Here is what I found take it with a grain of salt but should help

NP 231J
Front = C-16118AF, No sensor, 6 studs
Rear = C-16117Y
Center = C-17391, Speedo, No sensor
Tail = C-16223
Planet = gears
Input = 23 splines, Female
Front output = 26 splines, Fixed yoke
Rear output = 27 splines, Slip yoke
Sprocket = , chain links wide
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Old 06-09-2013, 07:47 PM   #13
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Ritchie

it is a silver with red around it, tag about the size of the fill plugs or drain plugs actually it is larger than both of them but just up and to the right of them
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Old 06-09-2013, 08:29 PM   #14
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I believe you would have to get a Wrangler t-case with a 23 spline shaft, unless you are able to clock the Cherokee t-case. My whole drivetrain is from a Cherokee, but I don't think we had to clock it because I have a body lift, but I'm not totally sure about that part since a buddy of mine swapped the stuff for me.
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Old 06-09-2013, 09:15 PM   #15
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Ritchie

it is a silver with red around it, tag about the size of the fill plugs or drain plugs actually it is larger than both of them but just up and to the right of them
Yeah I couldn't find any tag... It just has a number....
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Old 06-09-2013, 10:22 PM   #16
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What do you mean by clock?
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Old 06-09-2013, 10:37 PM   #17
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The bolt holes for the Cherokee T-case are in different positions than the ones on the Wrangler T-case. It causes it to sit at a different angle, which means it will hit the tub and not fit.

I guess some people use the Cherokee stuff, but new holes need to be drilled.
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Old 06-09-2013, 11:26 PM   #18
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The bolt holes for the Cherokee T-case are in different positions than the ones on the Wrangler T-case. It causes it to sit at a different angle, which means it will hit the tub and not fit.

I guess some people use the Cherokee stuff, but new holes need to be drilled.
I do have a body lift on mine as well
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Old 06-09-2013, 11:40 PM   #19
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Quote:
Originally Posted by YJ fanatic View Post
The bolt holes for the Cherokee T-case are in different positions than the ones on the Wrangler T-case. It causes it to sit at a different angle, which means it will hit the tub and not fit.

I guess some people use the Cherokee stuff, but new holes need to be drilled.
The difference is in the Transmission, not the transfer case.

I used a NP242 on my '90
The Jeep New Process / NVG 242 Transfer Case

Had the correct spline count for my AX5, but it bolted right in! (sorry)....
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Old 06-10-2013, 12:04 AM   #20
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Oh ok gotcha
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Old 06-10-2013, 07:26 AM   #21
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The difference is in the Transmission, not the transfer case.

I used a NP242 on my '90
The Jeep New Process / NVG 242 Transfer Case

Had the correct spline count for my AX5, but it bolted right in! (sorry)....
Thanks for correcting that. I wasn't totally sure. I had heard both.
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Old 06-10-2013, 07:38 AM   #22
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Quote:
Originally Posted by Ritchie View Post
I can't get my transfer case to shift from 2h... I'd like to have an extra to stick in while I'm having mine fixed so i wont be without my jeep.... I can't find one anywhere in salvage yards!
1989 YJ 4.2 5 speed. Any suggestions??
So you are planning to remove the TC and take it to a shop and have it rebuilt?

I haven't cracked open a 231 yet, but it's something that I would tackle on my own.

I googled "rebuild np231" and there are a bunch of videos on youtube. Can you do a little research before you take it into a shop? You might want to do it yourself. Or it might be bad linkage that you can clean up once you get it out of the Jeep.
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Old 06-10-2013, 08:37 AM   #23
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I agree with Stan. Get a HD chain, and new seals. Hell, maybe throw in a SYE while you're rebuilding it.

They aren't hard. Mostly snap rings and C-clips that hold it together inside.

And a couple of shift forks. One could be bound up, but that is pretty rare.

I really think its probably your linkage.

Anyway, they aren't too bad.
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Old 06-10-2013, 02:51 PM   #24
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I agree with Stan. Get a HD chain, and new seals. Hell, maybe throw in a SYE while you're rebuilding it.

They aren't hard. Mostly snap rings and C-clips that hold it together inside.

And a couple of shift forks. One could be bound up, but that is pretty rare.

I really think its probably your linkage.

Anyway, they aren't too bad.
I'm Gona pull it tomorrow and see what's up...what's a SYE? I took the linkage off and tried to shift it by hand on the transfer case itself and could move it
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Old 06-10-2013, 06:20 PM   #25
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Hmm..

Shift fork possibly bound up I guess.

Slip Yoke Eliminator.
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Old 06-10-2013, 06:51 PM   #26
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If you have any kind of significant lift like 3 inches or higher you should consider the Slip Yoke Eliminator especially if you are rebuilding the transfer case anyway I just did this to mine got the SYI from one of the vendors here off the forum I am very pleased with it and you have to crack the case anyway to replace the slip yoke you get a smaller output shaft and so you can increase the length of the rear drive shaft which will help with Vibrations and in my opinion the new drive shaft is stronger and better for off road.

Just my opinion though
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Old 06-10-2013, 07:43 PM   #27
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Ritchie

If you have any kind of significant lift like 3 inches or higher you should consider the Slip Yoke Eliminator especially if you are rebuilding the transfer case anyway I just did this to mine got the SYI from one of the vendors here off the forum I am very pleased with it and you have to crack the case anyway to replace the slip yoke you get a smaller output shaft and so you can increase the length of the rear drive shaft which will help with Vibrations and in my opinion the new drive shaft is stronger and better for off road.

Just my opinion though
I'm not really sure what all I have.... I bought from a guy, who got it from a guy, that got it from a guy......blah blah blah. It has a body lift and suspension lift....But I can tell the transfer case has been into before. The tail shaft has been off. So I need to see what's in there anyway. This is my first jeep so... It'll be a learning experience

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