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-   -   transfer case leaking oil (https://www.evolutionm.net/forums/evo-engine-turbo-drivetrain/242665-transfer-case-leaking-oil.html)

honda-guy Dec 30, 2006 09:51 AM

transfer case leaking oil
 
1 Attachment(s)
i was driving home and started to hear the t-case howling. the sound keep getting louder and louder. i was only 3 miles away from home, so i decided to drive the whole way home to look at it. when i got home, drove the car on ramps and looked underneath the car. oil all over the from the drive shaft back. looked around and i think the oil is coming from the drive shaft output seal. here are the questions.

1) is this a common problem for 03 evos (or all evos 8-9 in general)
2) other then the drive shaft output seal, where else could the leak come from?
2) if it turns out the be the drive shaft output seal, could i replace the seal without taking out the t-case. can i just remove the rear cap from the t-case to install the seal.


https://www.evolutionm.net/forums/at...1&d=1167500943

Sap12687 Dec 30, 2006 10:01 AM

That little white knob in the middle of the four screws is a breather/overflow outlet and oil will occasionally get out of there when overfilled.

As for the howling....i can only assume that its blown.

Heres the part im talking about, highlighted in hot pink....

http://i38.photobucket.com/albums/e1...You/Image1.jpg

honda-guy Dec 30, 2006 10:33 AM

i did change the t-case fluid about 2k miles ago, but i'm pretty sure i didn't over fill it because i didn't see any dripping in my garage floor. the fluid that came out was clear. if the diff was blown, i would think the fluid would be darker. i think the noise came from the fact that most of the t-case fluid leaked out. the noise probably came from the ring and pinion gear.

Sap12687 Dec 30, 2006 10:39 AM

well the ring and pinion gear would be making noise BECAUSE of low fluid.

honda-guy Dec 30, 2006 11:11 AM


Originally Posted by Sap12687 (Post 3807257)
well the ring and pinion gear would be making noise BECAUSE of low fluid.

yes, that's where i think the noise is coming from. not becuase the diff is blown. if the diff was blown, i would think darker fluid would be coming out.

the main questing is has anyone replace the rear seal without removing the whole t-case?

Evo_7 Dec 30, 2006 11:45 AM

Well yes the sound is because of low oil...And i think that your ring and pinion might be damaged...
I had the same problem a month back so i got the seal fixed...but now its leaking again but not much...
but ordering stage 2 shep trans now

barneyb Dec 30, 2006 02:15 PM

"if it turns out the be the drive shaft output seal, could i replace the seal without taking out the t-case. can i just remove the rear cap from the t-case to install the seal."

Yup.

scottatyamaha Dec 30, 2006 05:59 PM

That rear seal has been known to leak

honda-guy Dec 30, 2006 06:04 PM


Originally Posted by barneyb (Post 3807714)
"if it turns out the be the drive shaft output seal, could i replace the seal without taking out the t-case. can i just remove the rear cap from the t-case to install the seal."

Yup.

that's good to hear. man, i really hope it's just the rear seal.

honda-guy Dec 31, 2006 10:15 AM

update,
just to confirm that you can remove the rear oil seal without remove the rear t-case cap. you just have to remove the drive shaft and pop the seal out with a screw driver. the seal looked in good shape and there were still plenty of fluid that came out of the t-case when i drained it. there were some metallic in the fluid but no big chunks.

i'm starting to think the leak came from the breather hole on top of the t-case because there were still plenty of fluid in the t-case when i drained it. i decided to check the trainy oil and it seemed kinda low (just changed it 2k miles ago the same time as t-case and rear diff).

here's another question. is it possible for the tranny fluid to leak into the t-case causing it to over flow? or if the viscous coupling in the center diff go out, does it cause the t-case fluid to over flow?

DRFTKNGG Dec 31, 2006 10:26 AM

There was a TSB on this in 03.....I believe this is a warrentied item....

Sap12687 Dec 31, 2006 10:32 AM

The tranny fluid does not come in contact with the fluid in the t-case.

Evo_7 Dec 31, 2006 10:21 PM

Usually it does not but if your seal is leak than the tranny fluid can go in..
The same thing happened with me...
And the metal pieces were of ring and pinion
U will be in need of a new or a upgraded trans very soon

honda-guy Jan 2, 2007 04:48 AM


Originally Posted by Evo_7 (Post 3812136)
Usually it does not but if your seal is leak than the tranny fluid can go in..
The same thing happened with me...
And the metal pieces were of ring and pinion
U will be in need of a new or a upgraded trans very soon

what happend in your case? tranny fluid leaked into t-case or fluid leaked out off the t-case or both?

i checked my tranny fluid and it looked clean.

honda-guy Jan 2, 2007 10:19 AM

does anyone what the part number is for the drive shaft seal on the transfer case, or where i can order it online. the seal cost $5 but it'll cost me $10 in gas just to drive to the nearest dealer to pick it up plus my car is down right now.


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