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Unread 04-27-2013, 08:05 PM   #1
broken-wrangler
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Np231 to np242???

So I just bought a complete drivetrain out of a 96 Cherokee with only 20k for $800 bucks. I have a np231 in my yj with a SYE already but that stupid thing will not stop leaking no matter how many times I've gone through it, nor will it stay in 4wd no matter the linkage setting. First question is will my ax15 bolt up to it cause its off a automatic? And second with my SYE kit fit in the 242. Also is it a better tcase to use?

Thanks, josh

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Unread 04-28-2013, 02:29 PM   #2
broken-wrangler
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Nobody knows?
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Unread 04-28-2013, 07:51 PM   #3
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Originally Posted by broken-wrangler View Post
So I just bought a complete drivetrain out of a 96 Cherokee with only 20k for $800 bucks. I have a np231 in my yj with a SYE already but that stupid thing will not stop leaking no matter how many times I've gone through it, nor will it stay in 4wd no matter the linkage setting. First question is will my ax15 bolt up to it cause its off a automatic? And second with my SYE kit fit in the 242. Also is it a better tcase to use?

Thanks, josh

No, your SYE will not fit the 242. You should be able to take your input shaft out of your 231 and put in your 242 but they would have to be within the same few years of each other. The cut on the sun gear inside the 231 case changed during it's production sometime in the early 90's, but don't remember what year. A good resource is Advance Adapters. They can tell you about anything you want to know regarding the subject of the internals. But as mentioned above, your SYE will not fit and your input gear may..but it's a crap shoot. I know this....cause I tried, just fyi :-)
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Unread 04-29-2013, 11:57 AM   #4
superj
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and i think the 231 is the more desirable case because it has way more aftermarket support
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Unread 04-29-2013, 12:05 PM   #5
broken-wrangler
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Good to know. I guess I'll just sell it and make some money back. What do you guys think its worth
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Unread 04-29-2013, 12:07 PM   #6
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Good to know. I guess I'll just sell it and make some money back. What do you guys think its worth


242 goes for about 100. The 231's around 150-200.
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Unread 05-01-2013, 07:14 AM   #7
chinuck
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I did the 242 swap mostly because in my area at the time i couldnt find a 231 for less than 300. It bolted right up in my jeep however there are a few things to workout. I did have to install a different shifter gate due to the extra gear and so it is a straight pull back between gears. Also the metal tab that connects the shift linkage to the case i have to modify because when in 4lo the linkage forms a straight line so wont disengage without the help from prying it up with a screw driver. Then since the cherokees didnt have the vacume disconnect i just fitted a posi-lock setup. Only thing i havent gotten to is the speedo. I currently use just my gps for speed and range between fill ups but when i can get ahold a cherokee someone is parting out im gunna try splicing the correct connector into the yj wiring. yes there is less aftermarket support but in my opinion its worth since i deal with alot of transitioning between soft sand and harder trails the 4wd full time is nice.

Here is a pic of the gate i mentioned
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Unread 05-02-2013, 07:02 AM   #8
broken-wrangler
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So are you in full time 4wd?
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Unread 05-02-2013, 10:00 AM   #9
chinuck
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No it offers the same gears as the 231, 2hi,4hi part time,N,and 4lo, but in addition offers 4hi full time which is like awd in a way.
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