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Unread 06-28-2013, 03:54 PM   #1
dougiefresh131
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Help with transfer case leak

Hi all,
I have a leak in my transfer case. It is leaking from a tiny hole almost right above the transmission mount. It has been leaking for some time and it was only just recently that I took the skid plate off to get a better look.

In the picture you can see fluid beading up and the hole it is coming from directly above it.



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Unread 06-28-2013, 03:58 PM   #2
Randonexplosion
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So that would mean that your transission is leaking and running down onto your t-case?
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Unread 06-28-2013, 05:09 PM   #3
jeepmutiny
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Yup rear trans seal it looks like, not too big a deal to fix. With the skid off your half way there...Jon
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Unread 06-28-2013, 10:36 PM   #4
dougiefresh131
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Ok. Is the little hole where the fluid is coming from supposed to be there? What is its purpose?

Any more info about the rear trans seal?
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Unread 06-28-2013, 10:43 PM   #5
Randonexplosion
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I was wondering that as well. Maybe it is a failsafe so you will notice it before your trans fluid gets too low and it overheats?
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Unread 06-28-2013, 10:48 PM   #6
Knuckelhead
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Quote:
Originally Posted by dougiefresh131 View Post
Ok. Is the little hole where the fluid is coming from supposed to be there?
Yes.
Quote:
Originally Posted by dougiefresh131 View Post
What is its purpose?
To let you know it's leaking.
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Originally Posted by dougiefresh131 View Post
Any more info about the rear trans seal?
Do you have an OEM FSM?...
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Unread 06-28-2013, 10:54 PM   #7
Randonexplosion
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Yay im smart...
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Unread 06-28-2013, 11:05 PM   #8
Knuckelhead
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Originally Posted by Randonexplosion View Post
Yay im smart...
It also lets the adapter between the transmission and the transfer case remain at ambient pressure...
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Unread 06-28-2013, 11:07 PM   #9
Randonexplosion
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That makes sense. I dont think my AA adapter has one, maybe it would be a good idea to drill a small hole.
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Unread 06-28-2013, 11:15 PM   #10
Knuckelhead
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Originally Posted by Randonexplosion View Post
That makes sense. I dont think my AA adapter has one, maybe it would be a good idea to drill a small hole.
What AA adapter are you referring to?...
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Unread 06-28-2013, 11:21 PM   #11
Randonexplosion
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4l60e to np231. I need to take a closer look but im almost positive there is no "weep" hole.
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Unread 06-28-2013, 11:23 PM   #12
Randonexplosion
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Though I remember during WhyJs engine swap thread he noticed trans fluid leaking through the adapter due to a seal on the trans side that he didnt install. So I would probably notice it without a hole.
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Unread 06-29-2013, 05:08 AM   #13
yachtman
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Morning, yes your tranny output shaft seal is leaking, very common.

Drop front and rear shafts.

I don't drain tranny fluid, just have a pan rady.

There are 6 nuts on the transfer case 9/16's, the top 2 are tricky. They are a breeze if you pull the center console and the shifter, if its an automatic. Either way, no big deal, the top 2 are just a hassle.

Put a rolling jack under the TC, makes it allot easier.

Disconnect the TC linkage, screwdriver and pop it off.

Disconnect a few electrical connections on top of the TC case.

Pull the TC out.

Pull the tranny seal.

While its apart, replace the TC seal as well. Seals are less than $10 each.

Takes about 4 hours the first time. It's not hard just takes some time.

There are plenty of really good posts on the process.

Good luck.
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