Transfer Case Swap Info NP249->NP231 & NP242 - Page 31 - JeepForum.com
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post #451 of 3669 Old 04-25-2011, 01:30 PM
ZJ5point2GCL
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Quote:
Originally Posted by csouers

That's all you'll get. The case design and sensor location changed, I'm assuming in 95. My 92 XJ 242 has the mode sensor on the tailcone. It rides off of the shift rail, versus the shift sector like the newer ones.

I've run into the same problem with my 96 (which has said 92 xj 242 in it). I use the full time light as telling me not to drive on solid surfaces. When full time is lit up, the case is in part time.
Ahh damn too bad, oh well I just stuck that case in until I get a new VC in my 249 and re-build it, just figured that way I can take my time and still drive the jeep.

Since all it is a 3 way switch, maybe I can mess with which wires go where to get it to show correctly, cause it would be nice to know when it actually drops in.

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post #452 of 3669 Old 04-26-2011, 06:52 AM
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Ahh damn too bad, oh well I just stuck that case in until I get a new VC in my 249 and re-build it, just figured that way I can take my time and still drive the jeep.

Since all it is a 3 way switch, maybe I can mess with which wires go where to get it to show correctly, cause it would be nice to know when it actually drops in.

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Swapping the full time and part time terminals could work. Also, if you have the old 2 pin sensor, you could wire up something to work. Only problem I see is that the new sensor has its own pin for ground, and the old does not.

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post #453 of 3669 Old 04-26-2011, 09:02 AM
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Originally Posted by csouers View Post
Swapping the full time and part time terminals could work. Also, if you have the old 2 pin sensor, you could wire up something to work. Only problem I see is that the new sensor has its own pin for ground, and the old does not.
cant swap the sensors will not work. had to open case and swap the shift plate from the original case and use the original sensor that came from the jeep then it works fine
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post #454 of 3669 Old 04-26-2011, 03:09 PM
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cant swap the sensors will not work. had to open case and swap the shift plate from the original case and use the original sensor that came from the jeep then it works fine
That makes no sense. Swapping in the 249 sector would lose two positions and possibly make the detent disassemble itself inside the case.

His early model 242 case had the sensor on the shift rail on the FRONT of the case. There are no teeth or grooves on the early model 242 shift sector (the plate you're talking about) for the sensor (which is in the BACK) to ride on. He would have to use the 249 rear case along with a newer style 242 shift sector to get a properly working sensor readout.

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post #455 of 3669 Old 04-26-2011, 03:49 PM
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That makes no sense. Swapping in the 249 sector would lose two positions and possibly make the detent disassemble itself inside the case.
yeah, i wasn't thinking 242 & 249 because mine came stock 231 and i went from 92-231 to 94-231w/sye and in this situation i had swap that there plate to use my same plug it was just slightly different
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post #456 of 3669 Old 04-26-2011, 05:19 PM
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yeah, i wasn't thinking 242 & 249 because mine came stock 231 and i went from 92-231 to 94-231w/sye and in this situation i had swap that there plate to use my same plug it was just slightly different
Oh okay. 231 from factory Nice find.

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post #457 of 3669 Old 04-26-2011, 08:43 PM
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MAN, Jeep rookie here and i have a question that i couldnt find the answer to above and i studied for a long time to avoid reasking a question thats been repetitive..... Hoping one of you jeep gurus can help a rook out.

Just bought my first Jeep Grand Cherokee after looking for a year and i got a great deal. 94 ,super clean 4.0 with a auto and np231J transfer. Supposed to have needed an engine and transfer and has 230K on it but looks like a new vehicle inside and out its so clean. Picked up the Laredo for a whopping $450 and a water pump swap later it runs smooth and cool with no engine issues(impeller broken loose and not spinning). The transfer is wasted though as it was ran dry. The front driveshaft was in the boot and after installing it and filling the transfer case it lurches and jumps. I then stumbled across a parts jeep couple days back that is a 96 Sport Cherokee. It had the 4.0 with auto and the 242J transfer. After reading the info above, i checked my 231 transfer and it was manufactured 6/94 so it should be the same gear pitch. I see alot of info on swapping 249s to 231s but my dumb question is can i simply swap the 231 for the 242 since its what i have in hand?? Whats involved in this swap? My rear shafts are indentical wet shafts and the gearing is the same at 272. Any advice is appreciated and i will buy another unit if necessary but would love to keep this baby low budget for now..... Do i need to change out the bezels or plugs on the VIC? Is the linkage arm swap necessary? Will the extra gear position work without changing rears or computer?
Thanks alot Mudmaster, clueless in VA!
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post #458 of 3669 Old 04-27-2011, 04:48 PM
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Want to say thanks!

Thank you JrMechanic and all you guys for this amazing thread.
Just did the "driveway" 249to242 swap on my ZJ5.9 and works very nice with a 1" shorter rear driveshaft. Even better on the 46RE transmission rebuilt with a Transgo HD shift kit.
Couldn't make it without all this info.
Thanks again.
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post #459 of 3669 Old 04-28-2011, 01:06 AM
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Quote:
Originally Posted by MUDMASTER View Post
MAN, Jeep rookie here and i have a question that i couldnt find the answer to above and i studied for a long time to avoid reasking a question thats been repetitive..... Hoping one of you jeep gurus can help a rook out.

Just bought my first Jeep Grand Cherokee after looking for a year and i got a great deal. 94 ,super clean 4.0 with a auto and np231J transfer. Supposed to have needed an engine and transfer and has 230K on it but looks like a new vehicle inside and out its so clean. Picked up the Laredo for a whopping $450 and a water pump swap later it runs smooth and cool with no engine issues(impeller broken loose and not spinning). The transfer is wasted though as it was ran dry. The front driveshaft was in the boot and after installing it and filling the transfer case it lurches and jumps. I then stumbled across a parts jeep couple days back that is a 96 Sport Cherokee. It had the 4.0 with auto and the 242J transfer. After reading the info above, i checked my 231 transfer and it was manufactured 6/94 so it should be the same gear pitch. I see alot of info on swapping 249s to 231s but my dumb question is can i simply swap the 231 for the 242 since its what i have in hand?? Whats involved in this swap? My rear shafts are indentical wet shafts and the gearing is the same at 272. Any advice is appreciated and i will buy another unit if necessary but would love to keep this baby low budget for now..... Do i need to change out the bezels or plugs on the VIC? Is the linkage arm swap necessary? Will the extra gear position work without changing rears or computer?
Thanks alot Mudmaster, clueless in VA!
Honestly, if it came with a 231, keep the 231. Buy a 231 from a cherokee of your jeeps (94-95) era and swap the guts. As long as the annulus gear and input weren't trashed, you should just be able to swap the mainshaft, chain, and front output sprocket and be okay.

However, if you want to put in the 242 for sure, that 96 242 may not work, even with an input swap, although I've never seen it done the way you're going to do it.

Sorry. It's late and am really tired. I'll check back in a couple days.

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post #460 of 3669 Old 04-29-2011, 12:27 PM
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HI! when i was looking for this info could't find it enywhere! so i did it!

swaped the 249 to 242j from 2001 (wj) grand cherokee to my 1998 zj i6!

For this job you need some additional parts!
1. mainshaft http://www.jeep4x4center.com/product...number=4798145 which has thread for speedo gear
2. back case http://www.jeep4x4center.com/product...umber=83503156
3. the case for speedo sensor with hole!or you can make some driling with original case!
4. you can use speedo from 249 t case
5. need leveler from xj/zj tcase(which switch the positions and are bolted on tcase)
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post #461 of 3669 Old 05-08-2011, 01:33 AM
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Hi!

Now i have a 242 in the garage, i will change in the next weeks. The Transfercase is from 1996 and i hope i can change 1:1 to the transmissioncase, but only the outputshaft is to long, can anyone tell me how mach inches or millimeters i must cut?
The 249 had the inside slip and the 242 had the outsideslip.

Grand Cherokee 242cui I6, build in 1996 in Graz, 2" lift with spacers, 245/75 R16 BF Goodrich AT...

Sorry for my bad english, i donīt use it the last years...
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post #462 of 3669 Old 05-08-2011, 12:56 PM
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Its not much, around 1/3 of an inch.. less than a 1/4. Personally i would have the drive shaft shortend i dont think cutting the output shaft is a good idea, but thats just me. Since you have a 4.0, you should be able to get a drive shaft from a Jeep that has a 242 on it and that would be better then cutting stuff. Cutting things is really for the V8 users because we cant swap shafts
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post #463 of 3669 Old 05-08-2011, 01:03 PM
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If i cut the drive shaft, i can not use an other shaft if i have a crack or other problem, when i cut the outputshaft of the transfercase i can use any original drive shaft.

The problem here in germany is to find a zj with 242, in europe are all zj build with 249, only the diesel had an 231.

I think the drive shaft fom an XJ is to short. Or had it the same measurement?

Grand Cherokee 242cui I6, build in 1996 in Graz, 2" lift with spacers, 245/75 R16 BF Goodrich AT...

Sorry for my bad english, i donīt use it the last years...
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post #464 of 3669 Old 05-08-2011, 01:12 PM
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Im not sure about an XJ sorry.
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post #465 of 3669 Old 05-08-2011, 01:18 PM
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No Problem...

In germany i do not fund enough informations about a swap and the length of the drive shaft and outputshaft. One or two had cut the outputshaft, but they do not know how many...

Grand Cherokee 242cui I6, build in 1996 in Graz, 2" lift with spacers, 245/75 R16 BF Goodrich AT...

Sorry for my bad english, i donīt use it the last years...
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