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Unread 03-11-2010, 02:50 PM   #1
provinT13
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Auto np-231 fit ax-15?

Will the np-231 out of a 99 TJ fit into a YJ or XJ ax-15? Are the input shafts different lengths or splines?

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Unread 03-11-2010, 03:06 PM   #2
UltimatE
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According to the TJ Stock specifications page, the only one listed as having the smaller output shaft is the AX-5. So my educated guess is that it will work with your AX-15.

http://www.jeepforum.com/forum/f9/st...ations-452871/

Edit: Is it out of a 4cyl auto or a 6cyl auto? 6cyl auto is 23 spline. 4cyl auto is unknown, as its not listed on that page for output shaft size.
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Unread 03-11-2010, 03:09 PM   #3
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Where do you see that? I don't see anything listed under t-case for length. What about a cherokees
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Last edited by provinT13; 03-11-2010 at 03:25 PM..
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Unread 03-11-2010, 03:11 PM   #4
UltimatE
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Quote:
Originally Posted by provinT13 View Post
Where do you see that? They don't even have np-231 listed as t-case.
NP231 = NV231. New Process Gear changed their name to New Venture Gear. I was looking at the transmission post, where their output shafts were listed as all being 23 spline for the 6 cylinder transmissions.
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Unread 03-11-2010, 03:41 PM   #5
provinT13
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Ah alright. What about an np-231 behind an aw-4 on a cherokee?
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Unread 03-12-2010, 11:57 AM   #6
provinT13
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Bump. What about the np-2321 behind an AW-4 on a cherokee?

*edit* Just saw this

http://www.novak-adapt.com/knowledge...nput_gears.htm

So the t-case from the aw-4 is only 21 sline short shaft. I need 23 spline short shaft. The only way I can get one is from an ax-15
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