How to replace transfer case gasket?

[Dementedfish]

Been searching and searching and can't find the info I need so I'm giving up and asking here. Recently brought my 97 in and it's leaking in multiple places so I'm trying to replace the seals and gaskets on all the places I know it's leaking. So far I had the valve cover gasket done professionally but I'm looking to do the others myself. I've found write-ups on how to replace the gaskets in the oil cooler and transmission pan but can't find anything on the transfer case gasket. Can anyone share with me a write-up somewhere? Also, is there a part # for the gasket in the transfer case?

A shot of my leaking transfer case:

 

[Doc2012]

Two things:

1) there's not a seal there. It's FIPG (form in place gasket). The right stuff, a type of FIPG, can be had at any auto parts store, and is the best to use. That I've found anyway.

2) if you take the t-case off, there is a seal on the output shaft of the t-case. If you're leaking fluid, it's coming from one of two places:

1) either that seal, I. Which case it's ATF; and you need to top off the trans fluid, depending how long it's been leaking for.

2) the top of the transfer case, where the shifter is.

This is the more common if the two, and is easily fixed through the floorboard.

Take the shift knob off the t-case. Depending on year, it either screws on, or has a Phillips head screw holding it in place. Disconnect any wires, again, depending on year.

Take the trim off from the shifter, center console, and remove the center console.

Take the 8(?) 10mm bolts off of the shift cover.

Crawl under the truck and disconnect the shift linkage, (1) 12mm nut. (Assuming this is an automatic truck. If not, this step doesn't need to happen.)

CAREFULLY remove the shifter and shift cover off of the t-case shifter.

You can now see the t-case shifter, held on by (4) 10mm bolts.

Take those bolts off, and use a SMALL bead of FIPG around the shifter, and you should be all set.


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[Dementedfish]

Thank you for the advice, very informative. Now that I'm thinking about it, I believe it's actually leaking from the output shaft. I'm assuming I need to drain the fluid and then take it apart?

 

[Doc2012]

Which output shaft? Transfer case or transmission?


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[kolelt]

Could it actually be leaking from the shifter ? I had a leak that looked similiar to yours. And it was the shifter, the seal was just beat up. And fluid was leaking through the shifter and down

 

[amalik]

[MENTION=76419]Doc2012[/MENTION], you are pretty amazing for typing all that up in Taptalk on the iphone, lol.

 

[Doc2012]

[MENTION=76419]Doc2012[/MENTION], you are pretty amazing for typing all that up in Taptalk on the iphone, lol.

I was on the can. Lol.

But thank you.

 

[Dementedfish]

Could it actually be leaking from the shifter ? I had a leak that looked similiar to yours. And it was the shifter, the seal was just beat up. And fluid was leaking through the shifter and down

Either way, I'll check both just to make sure!

Which output shaft? Transfer case or transmission?

On the transfer case from what I understand.

 

[Doc2012]

Either way, I'll check both just to make sure!







On the transfer case from what I understand.

Ok, without seeing it, it's impossible for me to tell.

From what it looks like, you're either leaking from the t-case shifter, or the FIPG has a crack in it, and you're leaking from the transmission output seal.

If you think you're leaking from the transfer case output shaft, that's a whole different can of worms, and a different way to fix it, which requires a seal.

 

[amalik]

Ok, without seeing it, it's impossible for me to tell.

From what it looks like, you're either leaking from the t-case shifter, or the FIPG has a crack in it, and you're leaking from the transmission output seal.

If you think you're leaking from the transfer case output shaft, that's a whole different can of worms, and a different way to fix it, which requires a seal.

[MENTION=76419]Doc2012[/MENTION], quick question on all these 'if' statements and guessing games.

Shouldn't *physically* the Transfer case output shaft be on the side near the rear driveshaft connection, and the transmission output seal be on the opposite side (towards the engine), where the tranny and t-case connect?

 

[Doc2012]

[MENTION=76419]Doc2012[/MENTION], quick question on all these 'if' statements and guessing games.

Shouldn't *physically* the Transfer case output shaft be on the side near the rear driveshaft connection, and the transmission output seal be on the opposite side (towards the engine), where the tranny and t-case connect?

Absolutely correct.

 

[amalik]

Absolutely correct.

Right, so I'm thinking OP should either get us a better picture or understand what I said in my post; as it shouldn't be that hard to figure out the source of the leak.

 

[Dementedfish]

Right, so I'm thinking OP should either get us a better picture or understand what I said in my post; as it shouldn't be that hard to figure out the source of the leak.

Sorry for the vague information everyone, I just reviewed my inspection result notes, it appears it's leaking on the transmission output seal the t-case input seal, and the transfer case top seal. I found this old thread, not sure if it's what I need: http://www.toyota-4runner.org/3rd-g...r-case-output-shaft-oil-seals-how-diyers.html.

 

[Doc2012]

Are you on 3G4RM?

I feel, the first thing you need to do is get under there with some brake cleaner and clean the Tcase.

From there, keep an eye on it, and see where it's actually leaking from.

Fact of the matter is, shops will tell you what they have to tell you to get your money.

You can't trust them, unless you've got someone that you personally take it to, that shows you everything they're talking about.

I would see if you can get with someone local, and get a second opinion on the leak.

I can tell you what I think it is all day, but I'm not there and can't look at it.

Again, I'd say clean the t-case, and watch and see where it might be coming from.


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