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Old 09-14-2009, 02:41 PM   #1
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Question NP231 Transfer Case

This transfer case will fit a 1987 YJ?. Does somebody know.
Thanks

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Old 09-14-2009, 03:36 PM   #2
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I think it may need an adaptor, check with novak or advanced adaptors.

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Old 09-14-2009, 11:12 PM   #3
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Old 09-15-2009, 10:14 AM   #4
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Smile NP231 Transfer Case

I took a picture of the TC. This is what I have
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Old 09-15-2009, 10:28 AM   #5
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Just have to make sure the spline count is the same.Your 87 is probably 21 spline and if thats a newer 6cyl case it will be 23 spline.
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Old 09-16-2009, 04:14 PM   #6
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Wait a minute, I read the seal on the TC and it reads 231 NPC (NEW PROCESS) and in the Haynes Automotive Repair Manual for Jeep Wrangler 1987 thru 1999 Models the Chapter 7 part "C" - General information stated that only four transfer cases are used on these models: New Process (NP) 207, NP 231, NP 242 and New Venture (NV) 231. All four units are the same part-time design with three operating ranges: 2WD high, 4WD high and low, so I have a NP231, right?
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Old 09-16-2009, 05:22 PM   #7
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I got an 87 and its got the 231 but I've been told the 87 didn't come with it
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Old 09-16-2009, 05:26 PM   #8
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most 87 Yj's had the np207.. it appears you are lucky and have the 231.. enjoy...

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