YJ leak Between the Trans and Transfer Case - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 03-26-2013, 11:40 AM   #1 (permalink)
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YJ leak Between the Trans and Transfer Case

I have a 1993 YJ. I am getting ready to do the SYE kit. I noticed an oil leak between the transfer case and the transmission, where they mount together. It looks like there is a gasket between the two. Is there a shaft seal on the rear of the transmission shaft inside that housing? or does the rear of the trans seal against the transfer case? I assume there is an input shaft seal on the front of the transfer case. I would like to replace any seals that are needed while I am doing the SYE kit.
I almost forgot. It has a three speed automatic and a 231 transfer case.

Last edited by edog103; 03-26-2013 at 11:55 AM.
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Old 03-26-2013, 11:50 AM   #2 (permalink)
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There is a seal in the rear of the transmission that the transfer case input shaft slides into that you will need to replace. Additionally there is RTV sealant between the two that will need to be cleaned off and re applied.


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Old 03-26-2013, 12:03 PM   #3 (permalink)
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carful with the rtv, there is a weep hole at the bottom where the 2 meet so you can tell when a seal is leaking, id also replace t case input seal while there
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Old 03-26-2013, 01:24 PM   #4 (permalink)
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Thanks for all the help. I was able to track down and order an input shaft seal for the transfer case, but I can't for the life of me find a rear seal for the trans.
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Old 03-26-2013, 05:04 PM   #5 (permalink)
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Try this
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Old 03-26-2013, 06:04 PM   #6 (permalink)
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Additionally there is RTV sealant between the two that will need to be cleaned off and re applied.
From the factory there is no RTV, just a seal on the output of the transmission and the input of the transfer case. Your desire to help exceeds your knowledge base.

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Try this
That is no where near the seal he needs based on the picture.



For the t-case input seal, most places will spec out the single lip 3173, but I much prefer the 710928. It has two springs and two lips. It is literally twice the seal of the OEM part.

The transmission output should be a 710058 for the 32RH transmission in a 4wd application.

You can RTV the surface between the transmission and t-case if you don't trust your ability to install a seal. Ultra grey, ultra black or the Right Stuff are my favorites. They are extremely oil resistant and durable.

They make a complete seal kit that does your entire transfer case that is about $35. It also includes the shift fork pads and oil pump seal, as well as all o-rings. If you ever need this or any other stuff related to what you are doing, get ahold of me. I may not always be the cheapest, but am reasonable and well versed in being able to inform you of updates and helpful insight for a conplete repair.
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Old 03-26-2013, 06:37 PM   #7 (permalink)
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As far as the RTV goes, mine had it. Not saying it was factory, but it didn't seem out of place, so I didn't have a reason to question it. Installing the SYE was the first time I've pulled the transfer case apart from the transmission.

As far as the link goes, that is one of the available seals he could use. It clearly states on the website that the picture is representative of the actual product, and it also has the proper description for what he requested.

Application: Rear seal
With 3 speed automatic transmission

Just trying to help somebody who asked for it.
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Old 03-26-2013, 09:12 PM   #8 (permalink)
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Old 03-27-2013, 11:07 AM   #9 (permalink)
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Another question. I tried looking up what trans I have. Google says tf999 which is a 999 or a999 then there is the 32rh. So for a 93 Yj with 3 peed auto. Are these transmissions the same or not? Or did one evolve to another. I'm no mechanic, just a back yard knuckle buster at best.
Thanks for all the help
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Old 03-27-2013, 11:39 AM   #10 (permalink)
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Might have answered my own question it looks they are pretty much the same. Could be the reason I couldn't find a seal.
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Old 06-14-2016, 04:59 PM   #11 (permalink)
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We have the same issue on a customer's YJ right now. Interesting part though, the seals are dry and perfect, no wetness on the outside of the two parts, seems like the ATF is migrating to the t-case through the splined section of the tranmission output and t-case input shafts. Anyone ever try RTV on the splined sections to prevent this?
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Old 06-15-2016, 03:20 PM   #12 (permalink)
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We have the same issue on a customer's YJ right now. Interesting part though, the seals are dry and perfect, no wetness on the outside of the two parts, seems like the ATF is migrating to the t-case through the splined section of the tranmission output and t-case input shafts. Anyone ever try RTV on the splined sections to prevent this?
That can't happen unless the (female) t-case input is cracked. The splines connect behind the seal in the transmission.
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