Transfer Case Swap Info NP249->NP231 & NP242 - Page 35 - JeepForum.com
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Unread 06-14-2011, 08:26 AM   #511
Mechanicatwork
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same bolt pattern have already measured and the '06 tj uses the same speedo housing and drive gears as the '90 model TJ's and ZJ's. The only difference is the sensor. don't really care if the speedo works, I have a GPS unit that has a more accurate speed reading anyways. My concern was with the input gear. Was just curious if anyone had info or knew were I could find some on that case. And to help pinpoint what input I may have on my ZJ (1995 5.2 V8 with 46RH trans with 249 transfercase) Or if anyone had attempted a swap with this new of a case.

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Unread 06-14-2011, 08:38 AM   #512
csouers
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Quote:
Originally Posted by speedbucket

yes, if my memory serves me correctly then anything after 99 has no speedo sensor hole, but the bolts are the same and im not sure about the input
Post 99+ applies to WJs. 04 TJs with the 231 had the sensor. After that, I think there are discrepancies between the 231 and 241 (whenever the rubi came out). Maybe 05 was when the TJ switched to the trans sensor.
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Unread 06-14-2011, 09:38 AM   #513
Mechanicatwork
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I own a ZJ (95) and i know that '99 and up are WJ's. And yes the TJ's (all the way to '06 ran a three piece speed sensor (sensor,housing, drive gear) on the transfer case. So did the ZJ's and WJ's. '07 JK's started using vehicle speed sensor for the speedometer. either way, these issues are not my concern.
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Unread 06-14-2011, 11:41 AM   #514
csouers
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93-98 zjs used speed sensors in the tcase
99-04 WJs did NOT use a speed sensor in the tcase. It ran off the output sensor on the trans.

JKs use the tone rings at the wheels.

That said, just swap the tail housing and you're golden.
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Unread 06-14-2011, 02:34 PM   #515
Mechanicatwork
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not trying to start an arguement, hope your not taking it that way, and I'm sorry, I was incorrect on the WJ's. But I know the TJ and ZJ use the same speedo housing and gears, the only difference is the sensor mounted to the three piece speedometer gear. So why would i need to change the tail housing? And just to clearify things, your saying the 231 should bolt to my trans with no mods to the input gear.
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Unread 06-14-2011, 05:24 PM   #516
Darman
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ok so ive found a 242 TC and wondering if itll just be a direct swap or if im going to have to use the front cover off my 249. I noticed on the 242 the front drive shaft connecting point is different then my 249s
img_0608.jpg   photo.jpg   photo-1-.jpg  
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Unread 06-14-2011, 08:08 PM   #517
csouers
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You'll have to swap the front output and won't have a speedometer, unless you find parts from a 242 from an XJ or ZJ.

Also, your 249 is the old gear cut, so if you have to swap inputs, you're going to have to swap case halves.
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Unread 06-14-2011, 08:15 PM   #518
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Quote:
Originally Posted by Mechanicatwork View Post
not trying to start an arguement, hope your not taking it that way, and I'm sorry, I was incorrect on the WJ's. But I know the TJ and ZJ use the same speedo housing and gears, the only difference is the sensor mounted to the three piece speedometer gear. So why would i need to change the tail housing? And just to clearify things, your saying the 231 should bolt to my trans with no mods to the input gear.
I'm not bud. Just don't want you to have the wrong info!

The input will not match up. My bet is on your 249 having the long input shaft. The 231 *should* have the medium length input. Also, because of the (supposed) build date of your 249, You may have to swap the rear sections, but I'm not sure that is possible with a 231.

I personally have never seen a 231 torn apart in person, but assuming the differences, I guess not a lot of things are the same. Bolting up should be fine, but the input won't work!

The thing about the tail housing was in relation to the WJ. You might have to swap the actual speedometer gears (and rotate the sensor housing based on the markings), but that's a piece of cake.
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Unread 06-14-2011, 11:08 PM   #519
Darman
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Quote:
Originally Posted by csouers View Post
You'll have to swap the front output and won't have a speedometer, unless you find parts from a 242 from an XJ or ZJ.

Also, your 249 is the old gear cut, so if you have to swap inputs, you're going to have to swap case halves.
so i shouldnt buy this? i should wait for a 242 from a XJ or ZJ not a WJ? i think my tail cone is enclosed and not exposed like this one is and the front drive shaft attachment is different.
i was told that my TC was the new gear cut and i am almost positive ill just have to swap the front drive shaft out which isnt that big of a deal to me.
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Unread 06-19-2011, 03:36 PM   #520
jnjtrevino
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6/10/94 249
3/18/94 242

what are the chances these two TC's will have the same gear cut?
thanks
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Unread 06-20-2011, 03:30 PM   #521
csouers
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Quote:
Originally Posted by Darman View Post
so i shouldnt buy this? i should wait for a 242 from a XJ or ZJ not a WJ? i think my tail cone is enclosed and not exposed like this one is and the front drive shaft attachment is different.
i was told that my TC was the new gear cut and i am almost positive ill just have to swap the front drive shaft out which isnt that big of a deal to me.
I, honestly, would wait for a XJ/ZJ case. If you're not familiar enough with the cases, trying to retrofit things together could get nasty.
Quote:
Originally Posted by jnjtrevino View Post
6/10/94 249
3/18/94 242

what are the chances these two TC's will have the same gear cut?
thanks
Slim if any. That was right when the new gear cut was supposedly released (94.5).
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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 06-20-2011, 08:22 PM   #522
speedbucket
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crap,

so the 242 i have has a long crack next to the front output. i can use the front half of my 249 case right?
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Unread 06-20-2011, 09:23 PM   #523
csouers
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Depending on where your 242 has the mode sensor, yes. If you really don't care about the sensor, you can definitely use it.
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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

My Photography
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Unread 06-20-2011, 10:39 PM   #524
dlvsdh
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im confused

i have a 95 249 do i have the new or old gear cut ive herd 95 is the year change but here is says 94.5 and down how do i know
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Unread 06-21-2011, 02:07 AM   #525
Timon
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Can I use this?

I found a 231 from a 1993 XJ will this be a bolt on? Or will I have to open it?

I dont know what AT I have, but the car is registered in 1992, the shifter sais 1.2, 3, D, N, R, P and its a 4.0 I6. The transfer case is a 249.

I can also get a 242 from a 1990 XJ a lot cheaper, but that one has the 21 spline input right?

So, which one to buy?
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