Transfer Case Swap Info NP249->NP231 & NP242 - Page 30 - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Transfer Case Swap Info NP249->NP231 & NP242

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Unread 04-24-2011, 03:38 PM   #436
96WhiteZJ
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1996 ZJ 
 
Join Date: Nov 2010
Location: Paramus, NJ
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Whatsup guys, i have a 96 v8 zj with the 249, and i just picked up a 242 out of a 96 zj for my swap. However, where the rear drive shaft would go is different. I read this thread and im guessing my zj has an internal shaft, and my new tcase has an external shaft. Can someone verify that based on these pictures...







Also, what can i do to make my new 242 work with my jeep? If it helps the build date on the 242 is 96 1 and my current tcase appears to be 96 6, but the last digit is pretty beat up, i think its a 6.

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1996 Grand Cherokee. V8. 3.5 IRO lift, 31 inch Goodyear duratracs, JCR sliders/skid, 249 to 242 transfer case swap in progress.

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[URL="http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/"]http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/[/URL]
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Unread 04-24-2011, 04:20 PM   #437
csouers
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Quote:
Originally Posted by 96WhiteZJ
Whatsup guys, i have a 96 v8 zj with the 249, and i just picked up a 242 out of a 96 zj for my swap. However, where the rear drive shaft would go is different. I read this thread and im guessing my zj has an internal shaft, and my new tcase has an external shaft. Can someone verify that based on these pictures...

Also, what can i do to make my new 242 work with my jeep? If it helps the build date on the 242 is 96 1 and my current tcase appears to be 96 6, but the last digit is pretty beat up, i think its a 6.
You got lucky. That's a direct swap, as long as the 242 came from a Grand Cherokee. The rear output shaft on the 242 is a bit longer than the 249, so you may need to cut off .75" to prevent bottoming out.
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1998 Bright Platinum ZJ 5.9 Limited - 5.9l, 46RE, NV-242, D30/44a (Trac-Loc) w/3.73s - The DD
1999 White XJ Sport - 4.0l, AW4, NP-231, D30/8.25 w/3.55s - The Rig

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Unread 04-24-2011, 04:36 PM   #438
96WhiteZJ
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wow, thats good news thanks. But hows my drive shaft going to connect to my new tcase? Im guessing that one piece, with the ujoint, comes off my old t.c and goes on the shaft of my new one?
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1996 Grand Cherokee. V8. 3.5 IRO lift, 31 inch Goodyear duratracs, JCR sliders/skid, 249 to 242 transfer case swap in progress.

Build Thread
[URL="http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/"]http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/[/URL]
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Unread 04-24-2011, 07:34 PM   #439
csouers
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Same as the old. It just slides on and off. The boot (black rubber thing) goes over the yoke and just ziptie it secure when you get everything bolted up.

You don't have to take the front ujoint out to do this. Just the one at the axle.
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1998 Bright Platinum ZJ 5.9 Limited - 5.9l, 46RE, NV-242, D30/44a (Trac-Loc) w/3.73s - The DD
1999 White XJ Sport - 4.0l, AW4, NP-231, D30/8.25 w/3.55s - The Rig

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Unread 04-24-2011, 07:40 PM   #440
96WhiteZJ
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sweet, thanks for the info
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1996 Grand Cherokee. V8. 3.5 IRO lift, 31 inch Goodyear duratracs, JCR sliders/skid, 249 to 242 transfer case swap in progress.

Build Thread
[URL="http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/"]http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/[/URL]
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Unread 04-24-2011, 07:46 PM   #441
speedbucket
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sweet exhaust by the way...
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V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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Unread 04-24-2011, 08:51 PM   #442
PlatinumNiner
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Quote:
Originally Posted by johnson420 View Post
Is this bad?
That was good for a laugh lol. You have a transfer case thats 100% useless. Not even worth parts. Find another case.
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Unread 04-24-2011, 08:59 PM   #443
96WhiteZJ
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Quote:
Originally Posted by speedbucket View Post
sweet exhaust by the way...
lol, thanks. I HAD an 8 inch tailpipe pointing down but it fell off while offroading haha. I ordered a cat-back though
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1996 Grand Cherokee. V8. 3.5 IRO lift, 31 inch Goodyear duratracs, JCR sliders/skid, 249 to 242 transfer case swap in progress.

Build Thread
[URL="http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/"]http://www.jeepforum.com/forum/f22/96whitezjs-build-thread-1179405/[/URL]
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Unread 04-24-2011, 10:02 PM   #444
Travis873o
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so couple of specific questions.
i'm swapping in a 231j from a 99xj w/ same input shaft length thankfully.

A. I plan on doing a SYE as i have 4 in. RC lift n a ford 8.8 in rear. however, Is there a way of telling how long of a driveshaft to order? this is my DD so i can't just install the 231 and then wait for the driveshaft to get here.

Secondly has anyone figured out how to wire in the 231 shifter sensor (2prong) with the 249 sensor (4 prong)? and would i have to disconnect the black wires and connect the red ones in the back of the VIC to do so? Even if it only works partly that's better than not at all.

Also, was thinking about doing some upgrades to the 231 before I install it...i've read about wider chains, and a bigger planetary. Are these upgrades worth the money? I may plan on a 5.9 with built top end later but for now i just have a stock 5.2.

What is the best SYE kit out there i've looked at novak, advance adapters, tom woods. Which would be the best option, also are the super short SYE kits really worth it in a zj?
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Unread 04-24-2011, 10:05 PM   #445
ZJ5point2GCL
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so i pulled my 242 out of my 5.2 and stuck it in my 5.9 today, but when i switched the wires for the VIC all i can get is full time lit up.

Any ideas?

also the shift sensor in my 249 was on the other side of the case, the 242 is near the spedo sensor, is that normal?
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Unread 04-25-2011, 08:22 AM   #446
speedbucket
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Quote:
Originally Posted by ZJ5point2GCL View Post
so i pulled my 242 out of my 5.2 and stuck it in my 5.9 today, but when i switched the wires for the VIC all i can get is full time lit up.

Any ideas?

also the shift sensor in my 249 was on the other side of the case, the 242 is near the spedo sensor, is that normal?
i dont think that would work unless you swapped back to a post 95 input?????
93=5.2 and 1.55" input
98=5.9 and .840 input
right?
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V8 zj at 6" . Double tri rear and true 3 link front. Stretched to 108"
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Unread 04-25-2011, 08:58 AM   #447
ZJ5point2GCL
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Quote:
Originally Posted by speedbucket View Post
i dont think that would work unless you swapped back to a post 95 input?????
93=5.2 and 1.55" input
98=5.9 and .840 input
right?
the case i had was a .75 (if that exists, slightly shorter than one that was in the niner)

but i never swapped inputs for the 5.2, i just measured it up, and there were just enough seal engagement, so i bolted it up and hoped for the best, and 20,000 miles later there wasn't any leaks.
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Unread 04-25-2011, 10:47 AM   #448
Travis873o
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bump for post #444
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Built not Bought #170
My build thread:
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FOR SALE: ZJ 231 bezel,
PM me if you need one.
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Unread 04-25-2011, 12:28 PM   #449
JrMechanic
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Quote:
Originally Posted by Travis873o View Post
so couple of specific questions.
i'm swapping in a 231j from a 99xj w/ same input shaft length thankfully.

A. I plan on doing a SYE as i have 4 in. RC lift n a ford 8.8 in rear. however, Is there a way of telling how long of a driveshaft to order? this is my DD so i can't just install the 231 and then wait for the driveshaft to get here.

Secondly has anyone figured out how to wire in the 231 shifter sensor (2prong) with the 249 sensor (4 prong)? and would i have to disconnect the black wires and connect the red ones in the back of the VIC to do so? Even if it only works partly that's better than not at all.

Also, was thinking about doing some upgrades to the 231 before I install it...i've read about wider chains, and a bigger planetary. Are these upgrades worth the money? I may plan on a 5.9 with built top end later but for now i just have a stock 5.2.

What is the best SYE kit out there i've looked at novak, advance adapters, tom woods. Which would be the best option, also are the super short SYE kits really worth it in a zj?
If you can find the overall length of a 231 with the SYE you choose installed, you can measure from the flange on the 8.8 to the output shaft of the old transfer case, then subtract the difference you get with the SYE. You could also install the case and drive around with it in 4wd. As long as you aren't flooring it everywhere you go you won't have an issue for a week or two while you wait for a drive shaft.

As far as upgrades go, there isn't much that can be done to a 231 other than a wide chain kit and a SYE. The torque handling characteristics don't go up much with the wide chain kit and isn't worth the money IMO unless you're out to get every last ounce of strength you can out of it, or you're do for a chain and feel like upgrading.

I'd also stick with a traditional style SYE, the super short SYE's are for super short wheel base applications that need every bit of rear drive shaft length they can get. JB conversions, Tom Woods, Advance Adapters, Novak, etc. all make a great SYE kit. I'd suggest to go with whatever you can get the cheapest.
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Want to swap an NP242 or NP231 into your ZJ? Here's how:
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Unread 04-25-2011, 02:04 PM   #450
csouers
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Quote:
Originally Posted by ZJ5point2GCL View Post
so i pulled my 242 out of my 5.2 and stuck it in my 5.9 today, but when i switched the wires for the VIC all i can get is full time lit up.

Any ideas?

also the shift sensor in my 249 was on the other side of the case, the 242 is near the spedo sensor, is that normal?
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.
__________________
1998 Bright Platinum ZJ 5.9 Limited - 5.9l, 46RE, NV-242, D30/44a (Trac-Loc) w/3.73s - The DD
1999 White XJ Sport - 4.0l, AW4, NP-231, D30/8.25 w/3.55s - The Rig

My Photography
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