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-   -   Transmission leak (http://www.wranglerforum.com/f218/transmission-leak-45245.html)

kirok 02-25-2010 10:05 AM

Transmission leak
 
I had a pretty good leak in my auto-tranny for my 93. I removed the skid plate and cleaned off the bottom of the tranny with some brake cleaner. I started my vehicle and let it run for about 10 minutes or so. I shut the jeep down, and looked back under the vehicle. I did not notice any leaking from the vent or front, I made my inspection to the back and noticed a small hole dead center in the casing, just after the tranny mount, but before the transfer case. It was leaking pretty good. It doesn't seem to be a crack or anythng. In fact it looks something like a weep hole. The hole is about the diameter of a # 4 sheet metsl screw, maybe a bit smaller. Whatever it is, I believe I may have a blown seal somewhere near the leak. Not sure if its in the transfer case or the end of the transmission. Can anyone give me any insight as to what this hole may be? It seems to be originally machined that way.

kirok 02-25-2010 11:38 AM

It looks like what I'm looking at is my tranfer case. Where it ties into the tranny. Not sure what this hole is for exactly. I am assuming it's a blown seal or bad bearing. Still would like to know what this hole is for? If anybody has any insight, please let me know? T/Y

98wranglertj 07-22-2010 11:18 PM

I have the same issue, walk out to jeep and huge puddle on floor...it is leaking out of that small at the rear of the transmission and just in front of the transfer case...What is the problem???

Zack 08-27-2010 03:11 PM

Nobody on this forum seems to be able to provide answers to these types of questions I have found. Every thread I look at like this goes unanswered.

Walkingstick 08-27-2010 05:13 PM

Get a manual. Haynes.
And ask a mechanic on auto Jeep trannies

Zack 08-27-2010 09:37 PM

Haynes are a joke.

Walkingstick 08-27-2010 09:55 PM

If you say so... I was tossing an example out there

Zack 08-28-2010 07:43 AM

Thanks for the help.

mckinley4371 12-05-2012 07:05 PM

I have the same problem. It's the last leak I have left to fix. Apparently, on one side of this seam is a seal for the transfer case and on the other side is a seal for the transmission. One seal keeps the transmission fluid in, the other keeps the transfer case oil in. There's a splined shaft that goes from the transfer case to the transmission. These seals fit around that shaft. I was told I have to remove the transfer case to replace both seals and that it's not that difficult. I'll give a shot in the next couple weeks and let you know. (I have a TF999 transmission and a NP231 transfer case on a '88 YJ).

KingTJ 12-29-2012 06:21 PM

Quote:

Originally Posted by mckinley4371
I have the same problem. It's the last leak I have left to fix. Apparently, on one side of this seam is a seal for the transfer case and on the other side is a seal for the transmission. One seal keeps the transmission fluid in, the other keeps the transfer case oil in. There's a splined shaft that goes from the transfer case to the transmission. These seals fit around that shaft. I was told I have to remove the transfer case to replace both seals and that it's not that difficult. I'll give a shot in the next couple weeks and let you know. (I have a TF999 transmission and a NP231 transfer case on a '88 YJ).

Just completed this procedure the other day. Went pretty smoothly. The case between the transfer case and the transmission is considered to be an adapter. The weep whole is designed to let you know that one or both of your input and output shaft seals are shot cause either trans fluid to escape from the transmission or fluid to escape from the transfer case. The adapter is not meant to have fluid in it at all but if it does, it tells you that you've got a bad seal. It's a pretty straight forward process to pull both of the seals and replace. Disconnect all electrical plugs from the transfer case. Disconnect vent tube from top of transfer case. Disconnect front and rear driveshafts. Drop transfer case. Replace both seals. Reinstall. After all this, I was able to successfully stop my transmission fluid leak. Now onto the RMS, oil pan gasket, and the valve cover gasket, cause I don't know which of them is leaking oil!

mckinley4371 01-08-2013 07:43 PM

Yep. Pretty straight forward. Got the seals replaced and everything back in. And I did all the replacements in your last sentence this week. Now, if I can just keep the engine from dying at stop signs I'll be good (but that's another thread).


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