Need help identifying correct oil seal for rear transfer case leak
 

I've got a 1994 3VZE A/T 4WD 4Runner. And I've got a leak coming from my transfer case where the drive shaft connects. Looking online there are so many oil seals to choose from.

I looked up my vehicle here in this parts catalogue: https://toyota-usa.epc-data.com/4run...s/3609/34780D/ but there are 3 different oil seals.

(1) 34151A SEAL, OIL (FOR TRANSFER CHAIN CASE) is either part number: 90310-58001 or part number 90310-77001
(2) 34780D SEAL, OIL (FOR FLANGE YOKE) is part number 90316-40001

So I called Toyota and explained the situation - at first the guy gave me a part number that after I looked it up on parts.toyota.com it didn't even fit my 4Runner! So I gave him my VIM to get a better search going and he gave me part number 90316-40001 which matches the above search.
This is the seal the guy told me to buy: https://parts.toyota.com/p/Toyota_19...031640001.html. Its part number is 90316-40001.

So what I did next is to go look at my vehicle a little closer. And I can see one seal on the shaft itself but on the flange looking part of the shaft. So then I got nervous again since the part number that the Toyota guy gave me is called Flange Yoke seal but thats not the seal thats leaking!

Anyways, if someone could please help - I buy too many wrong parts :(

https://cimg7.ibsrv.net/gimg/www.yot...1d20dfc831.jpg
Pointing towards the leak on the back of the transfer case. Facing forwards towards the front of the vehicle. The damper is seen under the hand in foreground.
https://cimg6.ibsrv.net/gimg/www.yot...d37c4ead79.jpg
Oil leak is coming from where the green arrows are - not the seal where the red X is on the shaft itself.

Please provide the model#
It's on the same door jam sticker where the vin is. It'll be something like VZN130L-XXXXXX.
A did a quick look and also came up with 90316-40001.
Where both the front and rear companion flanges slide into the transfer case is the same 90316-40001 seal(green arrow) I'm not aware of any seal where the red X is. And getting a new stake nut is a good idea.

Do you know the history of the vehicle at all? That transfer case has been apart before.

Hi @Jimkola the model number is VZN130L-GKPGEA.
The red arrow points to some kind of rubber thing on the shaft, you'r probably right and its not a seal.
Stake nut is inside the transfer case?

When you remove the driveshaft you'll see the stake nut holding the companion flange on. Odds are, when you reassemble and torque to spec the staked area will land in the same spot, which is why they say to replace it each time.
Question. If you haven't removed the flange yet( I assume), why do you think the 90316-40001 is incorrect?
I rechecked my search using the model # and still come up with 90316-40001.

@Jimkola I'll grab a stake nut as well! thanks for the tip.

I was skeptical of the 90316-40001 part number since the Toyota rep I spoke to at first gave me a bum number (with complete confidence mind you). And also because the name for this part seems to be SEAL, OIL (FOR FLANGE YOKE) and I was thinking in my head, this seal goes on the transfer case - not the flange yoke (whatever that is - sounded like the u-joint housing to me) - so I was like, am I sure this is correct? better get some second opinions.

Back when I did Toyota parts everything was on microfiche/film. I could see all the various applications for that model at the same time. Much like the parts photo from EPC you posted. The new parts software requires a VIN. I can’t believe the first person you dealt with even tried without vehicle data.

Don't forget to match-mark the "propellor shaft" (drive shaft) to the flanges where ever you disconnect them. http://web.archive.org/web/201204171.../3propelle.pdf

I defer to Jimkola, but I think he's right; I got the same numbers from some online Toyota dealers. From the drawings, it appears that the transfer-case-side flange has a "cup" that protects the seal you're trying to replace. Again, from drawings, it appears that the flange and cup are one piece, so there is "nothing" under your red X.

Sometimes the name Toyota gave a part may not be the one that is more typically used. But the diagrams are dead accurate. Granted, the exploded view of a transmission or transfer can get pretty busy, but it’s all there. Just find a reference point and go from there. Everything will fall into place.

note: the exploded images in FSM often do not match the ones in the parts EPC. I mean it’s all the same pieces, they just would sometimes arrange it differently.

Does anyone know if this is the correct stake nut part? @Jimkola

part number: 90179-20001
URL: https://toyota-usa.epc-data.com/4run...s/3609/34780A/

that's it

For future readers I found the torque spec for the lock nut here: http://web.archive.org/web/201008152...r/services.pdf
its 87 ft/lbs.