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Old 01-26-2009, 09:25 PM   #1
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np231

my t-case is shot and i need a new one. are all np231 cases the same? i have a 2002 wrangler sport with iline 6 and 5 speed. which one do i need?

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Old 01-26-2009, 09:35 PM   #2
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Make sure you get the right spline count.

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Old 01-26-2009, 09:53 PM   #3
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what spline count do i have? 23?
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boosted inline 6 50. trim turbo
40" super swamper boggers
high pinion d44 front trussed
ford 8.8 rear axle conversion
se 9500 milemarker winch
locked front and rear
rough country steering stabilizers
clayton long arm
3inch body lift
2 coil spacer lift
eagle alloys 15's
on-board air system
kc daylighters 100w long range
rocker guards
rhino liner
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Old 01-27-2009, 12:21 AM   #4
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Not sure. I think the 6cyl is 23. Wait for some of the other more knowledgeable people to chime in.
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Old 01-27-2009, 01:17 AM   #5
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Yes you have a 23 spline 231. If you have a good input shaft on your Tcase you can use virtually any 231 from a jeep. Even a YJ Case. All of the internals are the same minus the input shaft. That can easily be replaced in about an hour. YJ Cases use a vacuum module for the 4WD lights in the cab, but that can also be removed and replaced with the electrical connector on your TJ 231.
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