Transfer Case Swap Info NP249->NP231 & NP242 - Page 4 - JeepForum.com

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post #46 of 3197 Old 02-06-2009, 10:19 PM
bigbluezj94
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is a 242 from a 91 jeep cherokee going to have the same gear cut as my 94 grand? found a good deal, close.


94 Grand Cherokee Laredo ZJ, lifted, 37s, yada yada yada
BigBlue build 33s, 6in lift and short arms
http://www.jeepforum.com/forum/f197/bigbluezj94-build-thread-679496/

BigBlue build 3/4 ton axles, LAs, 37s
http://www.jeepforum.com/forum/f197/3-4-ton-zj-build-818891/

99 Grand Cherokee Laredo WJ, 4.7 liter, 247 Quadra Trac II, fully loaded


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post #47 of 3197 Old 02-06-2009, 11:32 PM Thread Starter
JrMechanic
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Quote:
Originally Posted by bigbluezj94 View Post
is a 242 from a 91 jeep cherokee going to have the same gear cut as my 94 grand? found a good deal, close.

Whats the MFG. date on your ZJ?

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #48 of 3197 Old 02-07-2009, 12:08 AM
ratmonkey
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the change was in 95 iirc.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #49 of 3197 Old 02-07-2009, 10:25 AM Thread Starter
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Quote:
Originally Posted by ratmonkey View Post
the change was in 95 iirc.
From everything I've read, the change was between 94 and 95.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #50 of 3197 Old 02-07-2009, 12:09 PM
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Quote:
Originally Posted by bigbluezj94 View Post
hey boss,
ive got a 231 sittin in the garage at my parents house back in nc. Its out of a 97 or 98 TJ. i would love to use it for my swap and save some dough but my zj is a 94. im worried that if the shafts arent the same size, which they more than likely arent, then the gear cut will be different. there is really nothing i can do but rip them apart and see, huh? great write up btw
if u use the tj case ull have to swap the front output yokes. tjs used different front driveshafts i think

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- 1996 Black ZJ Limited: 5.9 swap, LA's, axles, absolutely built to hell
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post #51 of 3197 Old 02-07-2009, 02:00 PM Thread Starter
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Quote:
Originally Posted by BLACKzj52 View Post
if u use the tj case ull have to swap the front output yokes. tjs used different front driveshafts i think
Yeah, I missed where he said TJ. I it was either the front output yoke or the splines on the drive shaft were different.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #52 of 3197 Old 01-17-2010, 12:07 AM Thread Starter
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Okay guys, I updated this thread with a freaking TON of information, as well as a whole different swap. It now covers swapping inputs, as well as the information on gear cuts and input shaft length.

I ask that anyone who has done this swap make suggestions and or give input on this thread.

I have some pictures, but I won't be adding them until tomorrow. I just spent two hours revising this, and it's time for bed.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #53 of 3197 Old 01-17-2010, 12:12 AM
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tons of info, thanks
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post #54 of 3197 Old 01-17-2010, 04:21 PM Thread Starter
JrMechanic
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Well I finished up the 242 swap today. Tested everything out and it seems great Did a nasty burnout too.

I was told there's a revised part for the bushing that atatches to the body for the transfer case linkage. Anyone have a part number for it? The bushing is bad on both mine and my buddy's ZJ's.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #55 of 3197 Old 01-17-2010, 04:53 PM
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Originally Posted by JrMechanic View Post
93-95 V8 ZJ's: 46RH transmission, 1.55" 23 spline input shaft
93-95 I6 ZJ's: Used both the .750" and .840" 23 spline input with the 42RE and AX15.
93 I6 ZJ's with the AW4: 1.55" 23 spline input
All 96-98 ZJ's: .840" 23 spline input

Are you sure?? I have read a lot of other places that my '98 ZJ V8 will have the 1.55" input. I have a '93 231 23-spline with the .840" and if what you say is true, it should swap right in without having to change inputs. I am really tempted to just pull my 249 and measure. It seems to be the only surefire way to know.

"Si Vis Pacem, Para Bellum"

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post #56 of 3197 Old 01-17-2010, 06:34 PM
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Are you sure?? I have read a lot of other places that my '98 ZJ V8 will have the 1.55" input. I have a '93 231 23-spline with the .840" and if what you say is true, it should swap right in without having to change inputs. I am really tempted to just pull my 249 and measure. It seems to be the only surefire way to know.
no, he's not sure. we make this stuff up.

to quote another poster here.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #57 of 3197 Old 01-18-2010, 09:01 PM
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I understand what he said. I have just read up a lot on this topic and everyone else has been giving conflicting information. If it is completely true that ALL ZJs, no matter what engine, have the .840 input, then that makes the PITA input swap unnecessary for us 96+ V8 owners. I think I have read every t-case swap thread and I grew into the understanding that I needed to swap inputs. I want to be sure because this is my DD and toy all in one.

"Si Vis Pacem, Para Bellum"

'98 ZJ Limited V8 "Daisy"
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post #58 of 3197 Old 01-19-2010, 11:01 AM Thread Starter
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96+ V8 ZJ's are known as the easiest swap as 96-98 4.0/Selec-Trac combos are very common, and they both share the .840" input shaft.

93-95 V8 ZJ's are generally a PITA because they all have the 1.55" input shaft.

I just added a few pictures to the original post.

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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post #59 of 3197 Old 01-28-2010, 07:05 AM
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hello, a few days ago we make the tc swap from a 97 Cherokee to my 98 GC. No problem, it was an easy job without any mods on the tc. Just pull out the 249 and put in the 242. After adjusting the linkage everything works fine. Thank you for the infos of this thread, it helps me by giving me the kick to do this mod. Ps sorry for my bad english, school time is far away.Dany.
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post #60 of 3197 Old 01-28-2010, 09:59 AM Thread Starter
JrMechanic
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Quote:
Originally Posted by blues_brother View Post
hello, a few days ago we make the tc swap from a 97 Cherokee to my 98 GC. No problem, it was an easy job without any mods on the tc. Just pull out the 249 and put in the 242. After adjusting the linkage everything works fine. Thank you for the infos of this thread, it helps me by giving me the kick to do this mod. Ps sorry for my bad english, school time is far away.Dany.
Glad I could help, that's why I took the time to make this thread

Want to swap an NP242 or NP231 into your ZJ? Here's how:
http://www.jeepforum.com/forum/f13/n...pdated-685644/
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