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Author Topic: NP231 YJ to TJ  (Read 1623 times)

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Offline AV.NINE

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NP231 YJ to TJ
« on: February 17, 2008, 05:32:37 PM »
Just curious, will a NP231 from a YJ fit into a 99 TJ??

Also will the steering box switch over?

Thanks,
J
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Offline AV.NINE

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Re: NP231 YJ to TJ
« Reply #1 on: February 17, 2008, 10:26:47 PM »
anyone??
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Offline AV.NINE

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Re: NP231 YJ to TJ
« Reply #2 on: February 18, 2008, 09:25:32 PM »
Well I have a steering box and a t case coming. So for anyone who is wondering, we'll soon find out!
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Offline BlackYJ

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Re: NP231 YJ to TJ
« Reply #3 on: February 19, 2008, 07:25:44 AM »
The t-case will not be a problem as long as there are both mfor the same tranny, becasue input splines and shaft lengths are different depending on the tranny.
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'95 YJ with a few mods

Offline AV.NINE

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Re: NP231 YJ to TJ
« Reply #4 on: February 19, 2008, 10:45:27 AM »
Quote from: BlackYJ on February 19, 2008, 07:25:44 AM
The t-case will not be a problem as long as there are both mfor the same tranny, becasue input splines and shaft lengths are different depending on the tranny.

Ive been searching for a long time trying to find out what tranny I have. 99 TJ ax-15?
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Offline BlackYJ

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Re: NP231 YJ to TJ
« Reply #5 on: February 19, 2008, 10:52:17 AM »
Quote from: AV9Inch on February 19, 2008, 10:45:27 AM
Ive been searching for a long time trying to find out what tranny I have. 99 TJ ax-15?

That sounds about right, if it is a 4.0L 5 speed.  If the YJ t-case is from an AX-15 tranny there should be no problems
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'95 YJ with a few mods

Offline WagoneerXJ

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Re: NP231 YJ to TJ
« Reply #6 on: February 19, 2008, 10:56:04 AM »
I tried this once.....I was going to put an NP-231 from an 87 YJ 2.5L into a 97 TJ 2.5L.....totally different. Output was different, speedo cable was different, wiring was different.  Compare the two cases before you buy the YJ one. Just in case!
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98 XJ Sport 2 Dr, 3", 33's and Bushwacker Flat Flares
87 XJ Wagoneer 5", Dana 44, 34" Swamper TSL's
97 TJ 5.2 Magnum V8 swap, 4" and 33" MTZ's- GF's Jeep
84 Mustang GT-Built 351W 5spd
97 XJ - 3.5", 31" BFG. 370,000 KMS and counting!

Offline AV.NINE

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Re: NP231 YJ to TJ
« Reply #7 on: February 19, 2008, 11:15:31 AM »
I do have the 4.0L maybe thats the difference?
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Offline AV.NINE

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Re: NP231 YJ to TJ
« Reply #8 on: February 19, 2008, 11:34:52 AM »
Well just got the tag number #52099211 97-99 Jeep TJ..... not lookin good.
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Offline AV.NINE

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Re: NP231 YJ to TJ
« Reply #9 on: February 19, 2008, 11:42:37 AM »
http://www.novak-adapt.com/knowledge/np231.htm

Can someone interpret their "Transmission Compatibility & Adaptability"?? does that mean it will fit from 88-99?
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