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Old November 17th, 2020, 11:57
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bpatto10 bpatto10 is offline
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How much slop in 231j rear ouput shaft?

Hello,

1996 Jeep XJ, 231J transfer case, 8.25 rear axle, While testing various things in search of a whine noise, I noticed a little slop up and down in my transfer case rear output shaft. It feels like maybe 1/16", hard to tell exactly. I don't feel any slop while pushing the shaft in or out. I have seen several threads about rear output shaft bearings going bad (and even snap rings breaking). Some of these threads have indicated there should be no movement at all. I checked the transfer case fluid and there was nothing usual.

The only thing I can find that might be abnormal is this slop. At first I thought it was a worn slip yoke, but after removing the rear driveshaft and testing it again, it was obvious it was the output shaft.
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Old November 17th, 2020, 12:23
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Rob Mayercik Rob Mayercik is offline
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Re: How much slop in 231j rear ouput shaft?

Is it the early tcase design (slip yoke inside an extended tail housing), or the later one (external slip yoke)? 96s are all over the map on stuff like this.

If it's the earlier type, it might be the big bushing inside the tail housing extension, but that's just a wild guess.
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Old November 17th, 2020, 12:58
RCP Phx RCP Phx is online now
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Re: How much slop in 231j rear ouput shaft?

Yes, you first have to tell if it is stock and what year!
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Old November 17th, 2020, 13:22
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bpatto10 bpatto10 is offline
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Re: How much slop in 231j rear ouput shaft?

Quote:
Originally Posted by RCP Phx View Post
Yes, you first have to tell if it is stock and what year!
It is a 1996 Jeep XJ, as stated in the first sentence of the posting. All stock. The 231J transfer case has a external slip yoke which does not extend into the transfer case. It has a output bearing in the rear external housing with a snap ring and rubber shaft seal.


I will try to find a picture and post it.



Thanks,
Bruce
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Old November 18th, 2020, 03:29
Jim Malcolm Jim Malcolm is offline
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Re: How much slop in 231j rear ouput shaft?

There should be no discernible up/down/side/side play in the output shaft on the style you have. 0n the earlier models where the seal rides on the OD of the yoke, you'd need to have the yoke in place to do the test. The rear output bearing needs replaced,
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