88 4 cyl swap transfer case swap to 89 6 cylinder ? - JeepForum.com
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Unread 03-26-2010, 02:20 PM   #1
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1989 YJ Wrangler 
Join Date: Mar 2010
Location: Ontario
Posts: 8
88 4 cyl swap transfer case swap to 89 6 cylinder ?

found a 88 4 cyl jeep looking to swap transfer cases from my 89 yj which is broken, IS that ok? mine is a np231 amc'' code the code on the 88 is np231 j'' Both manual 5 spd'

Last edited by YjShane; 03-26-2010 at 05:06 PM..
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Unread 03-26-2010, 04:11 PM   #2
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1987 YJ Wrangler 
Join Date: Jun 2008
Location: Maryland
Posts: 1,516
What transmission do you currently have? 4cyl AX5s and the 6cyl BA10/5 used the 21 spline input shaft to the 231 and AX15s used 23 splines. Not sure about what came with the auto transmissions.
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