Topic: Looking for part numbers for T-case oil seals

[FjordWarrden]

Hey guys,
As I wait for the rebuilt engine I decided to give the tranny a once over, I noticed signs of a oil leak from the rear output shaft on the T-Case.  I am having a hell of a time figuring out which seals I need for this job. Its a W56B tranny, 87 1st gen 4runner. I have a Gasket kit for the tranny and one for the T-case form Toyota, but it appears that there are no output shaft seals in the transfer case kit. And only two small seals in the tranny kit.
One seal is stamped with: "NOK" "left pointing arrow" "AH22401"
the other smaller seal is: "NOK" "AE1679H" and a "69"

any ideas on these seals or which seals to buy for the rear output?
My FSM seems to be lees than helpful in this regard

[OVRAROK]

Hey guys,
As I wait for the rebuilt engine I decided to give the tranny a once over, I noticed signs of a oil leak from the rear output shaft on the T-Case.  I am having a hell of a time figuring out which seals I need for this job. Its a W56B tranny, 87 1st gen 4runner. I have a Gasket kit for the tranny and one for the T-case form Toyota, but it appears that there are no output shaft seals in the transfer case kit. And only two small seals in the tranny kit.
One seal is stamped with: "NOK" "left pointing arrow" "AH22401"
the other smaller seal is: "NOK" "AE1679H" and a "69"

any ideas on these seals or which seals to buy for the rear output?
My FSM seems to be lees than helpful in this regard

21 spline marlin crawler eco seal...best there is..

[OVRAROK]

https://www.marlincrawler.com/transfer-case/parts-upgrade/misc-hardware/hilux/hd-transfer-case-rear-output-seal

[Hickory Nut]

Is that the seal to fix this leak as well? 85 Toyota Pickup 4x4

[OVRAROK]

 

Is that the seal to fix this leak as well? 85 Toyota Pickup 4x4

That could be coming from the splines..you could pull flange..clean splines on both ouput shaft and flange...apply rtv to splines and retorque..BUT...while your there...may as well replace output shaft seal with MC eco seal...

[FjordWarrden [OP]]

It was really quite easy and defiantly worth while, and well your at it order one for the front out put shaft as well so when its starts leaking you can fix it imediatly and save the $12 on shipping a $10 part.

[Hickory Nut]

I am not sure I follow. Would I have to remove the entire unit to change both seals. I have not looked in my book to see how it goes together yet. I noticed it yesterday while I was fixing fixing an exhaust leak. I watched a youtube video on how to fix the rear seal leak. It looked like my problem but I wanted to ask the pros and make sure.

[FjordWarrden [OP]]

I mean the out put shaft form the T-case that drives the front drive shaft. the procedure is essentially the same  except there is a few more pieces to that seal arrangement that are all replaced by the eco seal, there are good instructions on the Marlin crawler tech page. I believe I found it in the the instructions for putting lower gears in the T-case. The factory service manual skips over little things like seals, and the Haynes manuals just says " Transmissions are very complicated, take it to a professional". Marlins instructions also cover RTV on the splines, its really much easier than it sounds.

[Hickory Nut]

Thank you. That is good info. I will look at the tech pages and see if I can find it.

[OVRAROK]

Thank you. That is good info. I will look at the tech pages and see if I can find it.

If you near placerville ca..id be happy to help..

[Hickory Nut]

I have only been to CA once back in 94. We took a trip to Disney, Catalina Island, and Somewhere over in Mexico for a day. It was an experience I will never forget. I live in MS so will probably have to tackle this project on my own. I do appreciate your willingness to help though.