NP231 23 spline to 21 spline - JeepForum.com
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Unread 03-01-2007, 09:10 PM   #1
ROG97
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1997 TJ Wrangler 
 
Join Date: Oct 2005
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NP231 23 spline to 21 spline

Can the input shaft on the NP231 be easily changed from 23 spline to 21 spline.
The reason I ask is I found a good deal on a 231 with a tera low installed but it has the 23 spline input, I have the AX5 transmission in a 97 4 banger.

Thanks

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Unread 03-26-2007, 02:07 PM   #2
jeepdrvr101
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Yes

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Unread 03-26-2007, 05:13 PM   #3
sentinal02
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you're looking at a complete disassembly of both cases to swap it out. or just one if you want to spend the $$ and buy a new input gear. but yeah, it can be done.
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Unread 03-26-2007, 10:40 PM   #4
laredo_man
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I'm not 100 % on this .
but if the old t-case is the 2.72
and you want to go to 4:1 .the input shaft off the old case won't line up to the planetarys of the 4:1
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