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  #16  
Old March 21st, 2017, 17:56
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Nimrod Nimrod is offline
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Re: NP242 Transfer Case Tech

Very useful thread! Thanks for pulling all of this information together.
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  #17  
Old March 21st, 2017, 19:02
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Re: NP242 Transfer Case Tech

Quote:
Originally Posted by Kittrell View Post
There is a lot of good info out there on the options for the 242, but it is pretty scattered. I wanted to bring it all into one place. Now if you are like me you love the 242 for it's full time capabilities in the snow. However, if you are also like me then you like to take your XJ offroad. And that can present some difficulties depending on your budget and what you want the end product to be.

NP242 J (J for Jeep)
This is the case that comes in the XJ from the factory if you have the Selec-Trac 4wd option.

Late 23 spline input w/external slip yoke, this came in 1996 to 2001 XJ's.

Thanks for posting this Kittrell.

I almost ordered the IRO Hack n Tap but it says 27 spline (http://www.ironrockoffroad.com/10482.html) where your info says 23 spline. The only way I will know for sure is to pull the DS and count splines. Mine is the 2001 limited with 242 select trac with speedo gear just like in the picture.

I'm having a difficult time finding internet confirmation on which SYE to get for my circumstances. I have a front DS to put on that measures ~30.5" which should work if my homework is good. I have 3.5" lift. Getting a lite vibe on acceleration and growl on deceleration sometimes.
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  #18  
Old March 22nd, 2017, 07:18
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Re: NP242 Transfer Case Tech

I am referencing the input shaft, where the tcase mates to the transmissions. IRO and any other SYE will reference output shaft. Which is where the tcase mates to the rear driveshaft and the splined shaft you see in the photo above. Thy are 27 spline on all of the J cases. If you have the 242 that came in your Jeep from the factory, that IRO kit you linked is correct for your case.
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  #19  
Old March 22nd, 2017, 09:58
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Re: NP242 Transfer Case Tech

Quote:
Originally Posted by Kittrell View Post
I am referencing the input shaft, where the tcase mates to the transmissions. IRO and any other SYE will reference output shaft. Which is where the tcase mates to the rear driveshaft and the splined shaft you see in the photo above. Thy are 27 spline on all of the J cases. If you have the 242 that came in your Jeep from the factory, that IRO kit you linked is correct for your case.
Sweet, thanks for clearing that up for me.
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  #20  
Old April 8th, 2017, 10:03
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Re: NP242 Transfer Case Tech

Very beautiful and interesting thread.
In theese days i'm a working for a swap on my ZJ V8 5.2, i will mount a 242 to 249, i don't like full time ever..

I don't see the same version, because my tc is not AMG but AMC NP242AMC,my88, and it come from a XJ 4L, italian, because i come from italy.
It has a chain driven with rocker joint, the same to others 242HD.

You can see here:

http://s172.photobucket.com/user/mas...?sort=3&page=1

Master7
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  #21  
Old April 8th, 2017, 13:06
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Re: NP242 Transfer Case Tech

Quote:
Originally Posted by Kittrell View Post
The 242 in the ZJ is the same exact case as the 96+ XJ.
And it won't bolt up into a 91-95. The input shaft depth is too shallow.

I got a '93 from a JY to replace mine when it grenaded on the trail and ended up swapping the back half onto the front half of the original '91 to go home.
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  #22  
Old April 8th, 2017, 19:44
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Re: NP242 Transfer Case Tech

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Originally Posted by RedHeep View Post
And it won't bolt up into a 91-95. The input shaft depth is too shallow.

I got a '93 from a JY to replace mine when it grenaded on the trail and ended up swapping the back half onto the front half of the original '91 to go home.
That is correct, I should not have said exact.
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  #23  
Old April 9th, 2017, 01:43
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Re: NP242 Transfer Case Tech

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Originally Posted by Kittrell View Post
That is correct, I should not have said exact.

Hi Kittrell, but don't you know the NP242 AMC same the mine?

Master7
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  #24  
Old April 9th, 2017, 11:14
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Re: NP242 Transfer Case Tech

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Originally Posted by master7 View Post
Hi Kittrell, but don't you know the NP242 AMC same the mine?

Master7
You likely have this case. The 242AMC and 242 J are the same case. It is just a nomenclature change from when Chrylser took over AMC.

Quote:
Originally Posted by Kittrell View Post
Early 21 spline input w/internal slip yoke, this came in 1990 and down XJ's.

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  #25  
Old April 9th, 2017, 13:18
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Re: NP242 Transfer Case Tech

Yes i know, but into, there is a different chain to 242J, it was mount for the XJ ECE, export in Europe, for need more silence.

Master7
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  #26  
Old April 9th, 2017, 17:45
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Re: NP242 Transfer Case Tech

Yes, there is a different chain for the European 242. I am sorry if I missed a question you were asking. I did not post about the European version as it is not pertinent to 99.9% of our members.
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  #27  
Old April 10th, 2017, 00:59
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Re: NP242 Transfer Case Tech

Quote:
Originally Posted by Kittrell View Post
Yes, there is a different chain for the European 242. I am sorry if I missed a question you were asking. I did not post about the European version as it is not pertinent to 99.9% of our members.

Ok it is not a problem just imagine! I very well this Thread :http://www.naxja.org/forum/showthrea...1122820&page=2
bed where the 242ece with its HV-061 chain is mentioned several times, my problem is that I'm doing
a rebuild to my tc NP242 AMC and I also wanted to replace the chain but it is difficult to retrieve it, maybe it's out of stock . I wanted to ask if maybe it is possible to replace it with another but with round pins instead of rocker joint. Master7
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  #28  
Old April 10th, 2017, 04:41
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Re: NP242 Transfer Case Tech

Quote:
Originally Posted by master7 View Post
Ok it is not a problem just imagine! I very well this Thread :http://www.naxja.org/forum/showthrea...1122820&page=2
bed where the 242ece with its HV-061 chain is mentioned several times, my problem is that I'm doing
a rebuild to my tc NP242 AMC and I also wanted to replace the chain but it is difficult to retrieve it, maybe it's out of stock . I wanted to ask if maybe it is possible to replace it with another but with round pins instead of rocker joint. Master7
the EU chain is the same as Police Package XJ used. But you can use the standard chain also.
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  #29  
Old April 10th, 2017, 06:49
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Re: NP242 Transfer Case Tech

Quote:
Originally Posted by master7 View Post
Ok it is not a problem just imagine! I very well this Thread :http://www.naxja.org/forum/showthrea...1122820&page=2
bed where the 242ece with its HV-061 chain is mentioned several times, my problem is that I'm doing
a rebuild to my tc NP242 AMC and I also wanted to replace the chain but it is difficult to retrieve it, maybe it's out of stock . I wanted to ask if maybe it is possible to replace it with another but with round pins instead of rocker joint. Master7
Okay, I follow now. The ECE chains can definitely be difficult to find. As Indian indicated you can use the standard chain in your case.
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  #30  
Old April 10th, 2017, 12:22
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Re: NP242 Transfer Case Tech

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Originally Posted by indian View Post
the EU chain is the same as Police Package XJ used. But you can use the standard chain also.


Master7
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