Transfer case/transmission seal... (1 Viewer)

[WJB4000]

Alright, how difficult is it really, to pull the transmission out and then replace the seal that leaks between the two? I'm debating on whether to do it in my driveway or not. I am a mechanic but don't have access to the shop I work at after hours, so it's either I do it at home or pay someone. I really don't want to pay someone to do it since I know I am capable, but I also don't feel like rolling around on the ground pulling this thing out...so what say you?

The reason for pulling, is because I'm getting gear oil into the transmission. I'm assuming it's whatever seal that everyone talks about that's leaking, just not sure what the seal looks like since I've never been into one

Thanks for any and all advice...

 

[2mbb]

I don't have an FJ62 with an auto transmission, but I have done it a few times by myself in my garage with the manual transmission attached. The most difficult part is balancing the transmission and transfer case as you are dropping them, or putting them back in. I used a cheap transmission jack from Harbor Freight and I built a plywood platform to support the transmission & transfer. Because the transmission is off center from the transfer case, the center of mass (balance point) is somewhere in the gap between the two. Once the unit is dropped, getting it out from under the truck, without a lift, is a little tricky. I used a couple of floor jack to lift the unit off the transmission jack and drop the plywood platform to the ground so I could drag it out from under the truck. With a second person, you could probably just lift it off.

An alternative would be to remove the transmission tunnel and use a engine hoist or chain hoist from above.

Another alternative is to rebuild the transfer case with the transmission installed onto the engine.

 

[Gengis]

Your avatar shows a 62, so lets assume a H55F with a split transfer case if manual or a A440 with a split case if Auto.
In any case, you have to strip the transfer case almost to pieces, to get to that seal whether in situ, or if you pull the whole box/case out.
I don't even think a really good gynaecologist can do that seal any other way.
On the bright side, you get to have a really good look at your transfer case bits while you are there. its about a 6 carry job if you have a good kit and if there are no nasty suprises.
There is a kit which works around this problem, but it only applies to a manual box. You will have to search for more info on this one. It lets oil flow from one to the other?? Not really sure how it works.

 

[Gengis]

You'r in the USA/ sorry , make that a 6x6 pack job.
Don't forget the oil when your done.
Use a genuine Toyota seal and pray the shaft is not scored.

 

[Dynosoar]

A US spec FJ62 will have an A440F auto trans. If you are a mechanic you can easily do it at home. You do NOT have to pull the trans., however, you will have to completely R&R the t-case. You 100% should fully rebuild the case while it is apart. New bearings gaskets and seals. Get a copy of the FSM and follow the steps.

Dyno

 

[WJB4000]

Thanks for the replies, fellas. I guess I'll be looking in a manual to find the procedure and see what's all involved. And yes, sorry, it is a US spec 62 with an auto.

 

[Output Shaft]

After you go to all the trouble, expense and effort to finally replace that seal, just know that not too many years in the future that new seal will wear and start leaking again.

In 1989 I installed a new H55F transmission in my FJ60 and rebuilt the transfer case with new seals and everything.
It couldn't have been more than 3-4 years after that, that I started detecting oil migration.... the seal was leaking.

Not wanting to deal with replacing the seal again, I just kept a regular eye on the oil levels for the next 25 years. Adjusting as needed. Recently, I had the time, garage, second car and equipment (transmission jack) to deal with it. If I did not have those things, I never would have replaced that seal again and just kept on top of the oil levels for as long as I owned the car.

My new transfer oil seal does not leak now. A few years in the future? I am sure it will.

 

[CarcaineProblems]

SOR sells the kit that connects the fill hole on the tranny to the fill hole on the transfer. Roughly $100 IIRC. It works, but the fittings are a bit leaky and its too long IMHO. I can snap some pics if you'd like

 

[dbleon]

Dudes...he has a auto tranny. Gear oil can ruin the slushbox.

I believe the only work around its to run a gl4 rated atf...Redline carries one.

That way you know your tranny won't get fried, but how well does it protect in the transfer case...well that's the question that seems to elude.

 

[RMutt2017]

Actually it's not that hard. I'm a sorta noob mechanic, and i did it with my mechanic friend in outside on the ground. I've got 33" tires and a ome lift with sliders and after we dropped the tranny onto a piece of plywood we were able to slide the plywood and it out. As long as you are on level ground and have two people and a twelve pack you should be good to go. Remember to take off access plate in the cab to get at two top bolts and don't forget to replace all the little rubber and brass bushings on your tranny linkage while you have access.

 

[2mbb]

Remember to take off access plate in the cab to get at two top bolts...

I used a really long 1/2" extension to get to the top bolts. More tools is always better than more work, IMO.

 

[RMutt2017]

Oh wait a minute, you just want to get at seal btwn tcase and tranny? Don't need to drop tranny for that, I think. It helps and you can get at lots of other stuff like main seal, ability to drain all tran fluid, etc

 

[shipmag]

Just for your info if you have a manual transmission I sell a stainless steel braided hose to go from the fill plug of the transmission to the fill plug of te transfer case. Here is the url to the thread that talks about it. I had a guy install one on an FJ60 so i know it works.

 

[CarcaineProblems]

Just for your info if you have a manual transmission I sell a stainless steel braided hose to go from the fill plug of the transmission to the fill plug of te transfer case. Here is the url to the thread that talks about it. I had a guy install one on an FJ60 so i know it works.

Id like to see pics please. I think there are things about the SOR version I don't care for

 

[cruiserfj45]

If you get the truck high enough off the ground you can sit up under it and dissemble the t-case with everything still attached. I didn't pull the transmission when I did mine. You can rebuild the whole thing if you want or you can fix just the leak. I think with the manual you should be able to fix it on a Saturday. Don't forget you will need all the gaskets for the t-case, it comes off in layers, not heavy either.

 

[shipmag]

Here is the thread for the transmission to transfer case hose thread. https://forum.ih8mud.com/threads/transmission-to-transfer-case-bypass-hose.794901/

 

[shipmag]

This is a pic from the guy who installed it on a 60 with manual transmission. Here is a pic of his rig and the hose.

 

[CarcaineProblems]

On a 62,that would be close to the inner exhaust... Probably shortening it would help. How much?

 

[shipmag]

The two sizes i have is 12.75 for $59 and the 17.5 is $61.00. If you need a different length it will be a while before i order more and can include your special length in my regular order to my vender. I do these as group buys but order extras to help out guys so they dont wait long. Send a pm for paypal instructions.

 

[WJB4000]

Is there somewhere on here I can download a copy of the service manual? I got a Chiltons or Haynes when I bought the truck, but I didn't know if there was a better service manual available out there so I can do this at the house. I think I'm gonna try to knock it out once the weather gets warmer...Thanks for the confidence on this, I've just never been in one of these transfer cases and didn't know how bad it was...