242 transfer case question - JeepForum.com
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post #1 of 18 Old 12-31-2013, 09:12 AM Thread Starter
mudder53
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242 transfer case question

Hello, I have the np242j transfer case in my zj and I was out on some trails the other night and after pulling a powerstroke out of a snowbank, I snapped my rear driveshaft up on the slip yoke part of it. Along with that it took a good chunk off the output shaft that the driveshaft slides on to. I have an old np249 that I had originally took out of the jeep with an internal slip yoke on it. Would I be able to replace the np242s ESY shaft with the one from the 249 (ISY). I have a driveshaft for the internal slip yoke already, so that'd work perfect because I wouldnt have to spend any money! :P


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post #2 of 18 Old 12-31-2013, 10:05 AM
durango-bob
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I don't think that they are the same, but you can try it. Another option that would be a bit easier, but costs more, would be to install a hack and tap sye.
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post #3 of 18 Old 12-31-2013, 11:10 AM
Technohead
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Replace the TC with a NP231.
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post #4 of 18 Old 12-31-2013, 12:33 PM Thread Starter
mudder53
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This is what I have left of the output shaft so don't think a hack n tap would work. Paying the 225 at a local junkyard for a new 242. Will get the hack n tap and new driveshaft for this one down the road
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post #5 of 18 Old 12-31-2013, 03:02 PM
durango-bob
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Ouch. You should able to drive it in 4wd part time until you get a replacement.
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post #6 of 18 Old 12-31-2013, 04:01 PM
Gearhead31
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oy vey, that's a big ouch... Yeah, drive it in 4 hi till you can get it dealt with(preferably sooner rather than later if it's going to see a lot of miles). as to your original question, I'm pretty sure it's just different enough that it won't work.

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We can call it the Whoosh King Catalog System. :D
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post #7 of 18 Old 12-31-2013, 04:08 PM Thread Starter
mudder53
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I had to part time it home quite a ways. I'm just scared because my case has a bad chain clicks constantly. I thought that's what had originally went at first. I'm just biting the pillow and paying the cash for another JY case. Think it'd be easier on my part

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post #8 of 18 Old 12-31-2013, 04:11 PM Thread Starter
mudder53
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I just could not believe such a chunk of metal would just snap like that... My wheels still might have been spinning while shifting into reverse. It was one of those moments.. I was pretty sure she was calmed down

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post #9 of 18 Old 12-31-2013, 04:19 PM Thread Starter
mudder53
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I was in snow with the wheels spinning pulling somebody out. There was a lot of tension on the rope so I put it in neutral and it rolled back to release tension and when I went to put it in drive again I heard it snap. I gave it a good second or two in neutral even to roll back so I don't even see why this would have happened

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post #10 of 18 Old 12-31-2013, 04:25 PM
Gearhead31
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I'm guessing it was on it's way out anyways if it broke in that situation. =/

1995 ZJ ltd, 4.0 i6, *cough stock cough* 253,xxx and still pumping strong
1998 Chevy Cheyenne K1500, 5.7L Vortec, mostly stock
*In peace, sons bury their fathers. In war, fathers bury their sons. - Herodotus
Quote:
Originally Posted by JasonStebbins
We can call it the Whoosh King Catalog System. :D
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post #11 of 18 Old 12-31-2013, 05:42 PM Thread Starter
mudder53
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Yeah I was just pist that it went out at 5am out in the sticks. I was laying in quite a bit of snow at -35ish windshield to get my driveshaft disconnected from the axle. I guess it was better that it went there instead of out on the highway. Probably would of taken out my exhaust along with the tcase if that were to happen

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post #12 of 18 Old 12-31-2013, 11:53 PM
Gearhead31
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Quote:
Originally Posted by mudder53 View Post
Yeah I was just pist that it went out at 5am out in the sticks. I was laying in quite a bit of snow at -35ish windshield to get my driveshaft disconnected from the axle. I guess it was better that it went there instead of out on the highway. Probably would of taken out my exhaust along with the tcase if that were to happen
Oh I bet. Honestly I say you were extremely lucky it went out then instead of on the freeway. Sure it may have been a massive annoyance but it's better than grenading your rear axle when doing 70, eh?

Sent from mobile, where errors are common and I'm too lazy to correct them.
Gearhead31 Hooah!

1995 ZJ ltd, 4.0 i6, *cough stock cough* 253,xxx and still pumping strong
1998 Chevy Cheyenne K1500, 5.7L Vortec, mostly stock
*In peace, sons bury their fathers. In war, fathers bury their sons. - Herodotus
Quote:
Originally Posted by JasonStebbins
We can call it the Whoosh King Catalog System. :D
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post #13 of 18 Old 01-01-2014, 12:05 AM
kensnelling
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Quote:
Originally Posted by Gearhead31 View Post
I'm guessing it was on it's way out anyways if it broke in that situation. =/
Looking at the rusted metal compared to the clean metal on the shaft I would agree. That shaft had been cracked for a while.

Ken
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post #14 of 18 Old 01-01-2014, 06:29 PM
MN59ZJ
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Something's not right here. That shaft is 1" of hardened steel, it's not the weak link. The drive shaft tube should have twisted & ripped in two before this happened.

And for the 242 hater's club, that shaft is no different at that failure point than a 231.


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post #15 of 18 Old 01-01-2014, 09:36 PM Thread Starter
mudder53
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Ill take a picture of the driveshaft tomorrow and post that. The slip yoke that goes on that tcase shaft had a big chunk missing too

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