Transfer Case Swap Info NP249->NP231 & NP242 - Page 96 - JeepForum.com
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Unread 01-11-2013, 09:49 PM   #1426
lil_joe
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I've been reading through this for weeks, thought I had it figured out. Just scored a 242 from a 90 XJ, will it work in my 97 ZJ, without modification, or what must be changed so I can bolt it up.

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HER's: 92 YJ 4" RC 1.5 RC Booms, 1" BL on 33's
MINE's: 97 ZJ 5.2 Upcountry Limited Project 2" RE BB on 265/75 Mud Dogs, Locked front LSD rear, 242 swapped T-Case, RC Quick Disco's
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Unread 01-12-2013, 08:18 AM   #1427
zarnold
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Quote:
Originally Posted by lil_joe View Post
I've been reading through this for weeks, thought I had it figured out. Just scored a 242 from a 90 XJ, will it work in my 97 ZJ, without modification, or what must be changed so I can bolt it up.
It will not work - gear cut change in mid 95.

This is from the first page:


Input Shafts and Gear Cuts


There are 3 different input shafts, .750", .840", and 1.55", as well as both 21 and 23 spline shafts. All ZJ transfer cases have a 23 spline input shaft, and all 92-01 XJ's have a 23 spline input shaft. 91 and older XJ's have the 21 spline input.

Here's a general rule of thumb when determining your input shaft length. This is not always 100% accurate, so make sure you know what you have before buying a transfer case.

93-95 V8 ZJ's: 46RH transmission, 1.55" 23 spline input shaft
93-95 I6 ZJ's with the 42RE: .840" 23 spline input (with collar)
93 I6 ZJ's with the AW4 or AX15: .750" 23 spline input
All 96-98 ZJ's: .840" 23 spline input
All 96-01 XJ's: .840" 23 spline input
92-95 XJ's: .750" 23 spline input
91 and older XJ's: .750" 21 spline input

Last edited by zarnold; 01-19-2013 at 08:29 PM.. Reason: Incorrect information on input shaft swap.
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Unread 01-13-2013, 08:46 AM   #1428
Hardy350
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Hi All,
can I swap a input shaft out of a NV 247 in a NP 242 build Date 1993 ?
Thanks in advance

Hardy
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Unread 01-13-2013, 09:15 PM   #1429
zarnold
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Quote:
Originally Posted by Hardy350 View Post
Hi All,
can I swap a input shaft out of a NV 247 in a NP 242 build Date 1993 ?
Thanks in advance

Hardy
Can you give a few details of what your trying to accomplish. Your profile lists a Dana 300 TC, but I don't thing that's what your questioning about.
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Unread 01-14-2013, 10:19 PM   #1430
airwolf9090
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I am still waiting on knowing if a someone could use a XJ driveshaft in a ZJ if you swap in the External slip yoke case....
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Unread 01-14-2013, 10:36 PM   #1431
squazz
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Quote:
Originally Posted by airwolf9090 View Post
I am still waiting on knowing if a someone could use a XJ driveshaft in a ZJ if you swap in the External slip yoke case....
I know a guy that is running my 30" zj rear DS on his lifted 00XJ cuz his stock was shorter" so that could be a option your gonna have to measure a few to find out for certain

on that note im running stock DS on the 98-5.9 and 94-4.0 both have a 242 extSY
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Unread 01-16-2013, 05:37 PM   #1432
FPKites
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Definitely measure, and also remember that XJs also got the internal slip (mine for instance). My 242 swap took no driveshaft changes.
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Unread 01-19-2013, 01:18 PM   #1433
ratmonkey
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Quote:
Originally Posted by lil_joe View Post
I've been reading through this for weeks, thought I had it figured out. Just scored a 242 from a 90 XJ, will it work in my 97 ZJ, without modification, or what must be changed so I can bolt it up.
Quote:
Originally Posted by Hardy350 View Post
Hi All,
can I swap a input shaft out of a NV 247 in a NP 242 build Date 1993 ?
Thanks in advance

Hardy
no. both for the same reason, gear cut change.
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Unread 01-19-2013, 05:04 PM   #1434
lil_joe
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Ran across this write up, can I use my input shaft and swap how it's shown here? 97 249 input shaft swapped into 90 242

http://kevinsoffroad.com/techarticle...-242_swap.html
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lJeepl
--[.]IIIII[.]
Obsession is a word the lazy use to describe the dedicated
HER's: 92 YJ 4" RC 1.5 RC Booms, 1" BL on 33's
MINE's: 97 ZJ 5.2 Upcountry Limited Project 2" RE BB on 265/75 Mud Dogs, Locked front LSD rear, 242 swapped T-Case, RC Quick Disco's
www.virtualjeepclub.com/
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Unread 01-19-2013, 05:08 PM   #1435
comptiger5000
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Quote:
Originally Posted by lil_joe View Post
Ran across this write up, can I use my input shaft and swap how it's shown here? 97 249 input shaft swapped into 90 242

http://kevinsoffroad.com/techarticle...-242_swap.html
The inputs won't swap, as the gear cut for the input planetary changed in late 95.
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Unread 01-20-2013, 10:18 AM   #1436
ghatid
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I just went through the 249 --> 242 swap.

I started with a 249 (1998), that was skipping at low speed turns. When I opened up the 249, everything looked pristine, so I assumed the VC was the bad part. I decided to go with the 242 swap to save money.

I found a 242 (1997, supposedly) on craigslist, and when I picked it up, all the bearings, chain, etc, were more worn than my 249, but everyone says they last forever, so I just switched out some of the bearings and swapped the inputs. Also, the output shaft was a little long so...I just cut it short and it barely fits the rear drive shaft:-D...was that okay to do?

2 problems:

1. The shift tab I got (the part of the linkage directly attached to the tcase with one rectangular hole and one normal hole) is too long; it seems that the guy had given me a 249 shift tab with my 242. Does anyone know the distance between the holes so I can just drill it out? Right now the car only goes 4ft, N, 4Lo.

2. When I put the car in 4lo, it makes quite a bit of noise and jumps/skips when I turn, just like when I had the 249 in it. When I'm in 4FT, it makes less noise and doesn't skip. Is there a part in the tcase I have that's broken? I know you guys say it takes a bit of time to wear into the 4wd if it hasn't been used, but the 4ft is fine...

Any help is greatly appreciated! I wonder if I'm going to have to get another tcase:-/.

Thanks!
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Unread 01-20-2013, 10:29 AM   #1437
FPKites
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You shouldn't be driving it on the street in 4-low. The skipping and hopping you're experiencing is because the front and rear are locked together.

Please define the noise you are experiencing in 4FT.
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Unread 01-20-2013, 10:40 AM   #1438
ghatid
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Quote:
Originally Posted by FPKites View Post
You shouldn't be driving it on the street in 4-low. The skipping and hopping you're experiencing is because the front and rear are locked together.

Please define the noise you are experiencing in 4FT.
Well shoot, now I feel stupid, I'm new to 4wd, but I knew that much...(but happy because...you know, there might not be anything wrong with my tcase). The noise was mostly in 4lo.
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Unread 01-20-2013, 11:02 AM   #1439
ghatid
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Quote:
Originally Posted by FPKites View Post
You shouldn't be driving it on the street in 4-low. The skipping and hopping you're experiencing is because the front and rear are locked together.

Please define the noise you are experiencing in 4FT.
As far as noise in 4ft, I just drove it around, and it just sounds noisy...a speed dependent sound that's somewhere between a whir and a whomp.
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Unread 01-20-2013, 02:40 PM   #1440
Coog
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Does the noise disappear when 2wd is selected? If so it could be your front axle/diff.
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