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Old December 10th, 2012, 06:48 PM   #1
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Default 231 input needed ASAP

Anyone super smart with 231 tcase inputs and wants to talk on phone for a few minutes? Pm your # and I will call you
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Old December 10th, 2012, 06:49 PM   #2
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Whats the problem?
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Old December 10th, 2012, 06:53 PM   #3
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I'm on my phone in shop would rather just talk for 5 then do buttons one thumb at a time:)
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Old December 10th, 2012, 06:56 PM   #4
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Whats the problem?
whats it doing?
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Old December 10th, 2012, 06:59 PM   #5
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4 cylinder jeep 231's had 21 spline inputs, 6 cylinder had 23 spline inputs for wrangler's. Xj 231's had shorter output shafts than wranglers so if your trying to run an xj 231 in a tj/yj you have to cut the output shaft down, 1/2" to 3/4" will work.
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Old December 10th, 2012, 07:03 PM   #6
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4 cylinder jeep 231's had 21 spline inputs, 6 cylinder had 23 spline inputs for wrangler's. Xj 231's had shorter output shafts than wranglers so if your trying to run an xj 231 in a tj/yj you have to cut the output shaft down, 1/2" to 3/4" will work.
It's more complex than that
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Old December 10th, 2012, 07:29 PM   #7
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There's a difference in gear patterns on inputs and two different bearing thicknesses. Bearing look to be interchangeable between case halves, are they? Is the large gear in the case the planetarys ride on all the same? Are planetarys interchangeable?
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Old December 10th, 2012, 07:45 PM   #8
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What are you modding in the case? Making an HD wide chain? Sye? Could you change parts onto the new shaft?
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Old December 10th, 2012, 07:57 PM   #9
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I have 231 21 spline with sye. I had a 23 spline input to swap in. Took mine apart and the teeth on 23 spline are slightly diff and it takes a wider bearing. I have another 23 spline case so I took that apart. It has same teeth and bearing width as other 23 input. It looks like I can use wider bearing in case and take care of that part??
23 spline inputs won't work in 21 spline planetary because of gear difference right? The large gear the planetarys ride on will be different also correct?? Can I swap those and use 23 spline input and planetary in 21 case half?
Why the fukc wouldn't some one let me call:)
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Old December 10th, 2012, 08:01 PM   #10
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calling is so 1990's
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Old December 10th, 2012, 08:06 PM   #11
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Should I txt then? I was trying to sum this up in under 2 hours.
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Old December 10th, 2012, 08:07 PM   #12
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I do believe that the planetary are interchangeable. There's plenty of write ups on swapping them from diff model cases into jeep cases.
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Old December 10th, 2012, 08:11 PM   #13
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Just get your snap ring pliers out and disassemble both input shafts. Assemble one from two and fit that half into the case and see if it would fit properly. Trial and error
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Old December 10th, 2012, 08:12 PM   #14
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There is an "early" and "late" version of the plantary gear, the teeth are ever so slightly different, for some reason 1991 comes to mind as the change over year
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Old December 10th, 2012, 08:17 PM   #15
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I'm just gonna swap front half of cases trying to avoid that cuz I just put a brand new seal in case half I'm not using.

94.5 is when they changed gears its says on a few forums but both my case are older than that so??
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Old December 11th, 2012, 06:16 AM   #16
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There is an "early" and "late" version of the plantary gear, the teeth are ever so slightly different, for some reason 1991 comes to mind as the change over year

I was thinking it was 93, but don't really remember. Either way, it was sometime in the early 90's the front half of the case changed, the two are not interchangeable.
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Old December 11th, 2012, 02:05 PM   #17
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I was thinking it was 93, but don't really remember. Either way, it was sometime in the early 90's the front half of the case changed, the two are not interchangeable.
Are you saying I can't swap front case halves? I was planning in just swapping the 23 spline front half with input and planetaries onto the 21 spline rear half with sye.
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