Replacing rear output seal on transmission--possibly (probably) dumb Q

[lasoundguy]

OK, I'm working through transfer case gears and got the case removed. I'd like to replace the output seal on the back of the transmission (purchased P/N 90311-48016.) I've not pulled a seal with a shaft protruding out--how exactly does one do it?

Thanks in advance.

 

[chap79]

I used a screwdriver with some electrical tape on the tip to prevent scratching. Whatever method you use make sure to not mar the surface. Some thin shims or something to protect the outer edge. Mine came out pretty easy IIRC.

 

[Rusty Marlin]

Take a flat blade screw driver and place it near the outer edge of the seal, // to the shaft, and swat it with a hammer to crease the seal's metal cup. It will release the tension on the seal and it will slide out quite easily.
As warned above, be careful of the transmission case and don't scratch the seal's bore.

 

[lasoundguy]

View attachment 2317230

Take a flat blade screw driver and place it near the outer edge of the seal, // to the shaft, and swat it with a hammer to crease the seal's metal cup. It will release the tension on the seal and it will slide out quite easily.
As warned above, be careful of the transmission case and don't scratch the seal's bore.

Thanks @Rusty Marlin , that explains it. Appreciate it!

 

[flintknapper]

Thanks @Rusty Marlin , that explains it. Appreciate it!

The seal puller you pictured is designed mainly for seals that allow you to access the inner diameter (as you have already discovered). So the method @Rusty Marlin suggests can and does often work.

Alternately, for stubborn seals...you can drill a hole in the seal face (being mindful of anything behind it) and use a wood screw (of slightly larger diameter) to give you something to pry on. The pic below shows how I use that method (pic is of a lawn mower engine), but the same principle applies.

Good luck,

Flint.

 

[SmokingRocks]

How deep do you seat this seal? I can't find it in the FSM

 

[csanders]

Reviving this thread with another dumb question. Does the transmission output shaft need to be greased (or need anti-seize or something else on the splines) before sliding the transfer case back on?

 

[CharlieS]

I've done this job twice and don't remember lubricating the shaft. I think it gets bathed in gear oil...

 

[flintknapper]

Reviving this thread with another dumb question. Does the transmission output shaft need to be greased (or need anti-seize or something else on the splines) before sliding the transfer case back on?

No.

 

[bicycleagent003]

This thread is very timely. Thanks to the OP and those who replied. Much appreciated.

 

[calokie]

I’m doing this job today and just like “SmokingRocks” mentioned,
How deep do you set the seal?
When I install my seal it’s very difficult to get it flush with the transmission face surface, will the seal self seat after installation and when things get spinning

 

[flintknapper]

I’m doing this job today and just like “SmokingRocks” mentioned,
How deep do you set the seal?
When I install my seal it’s very difficult to get it flush with the transmission face surface, will the seal self seat after installation and when things get spinning

Typically....seals that seat into 'bores' are interference fit....so no, it will not continue to seat itself after installation.

In most applications a seal is designed to seat 'flush' with the surface or just below.

 

[calokie]

Typically....seals that seat into 'bores' are interference fit....so no, it will not continue to seat itself after installation.

In most applications a seal is designed to seat 'flush' with the surface or just below.

Thanks
I ended up installing it flush with the face with the assumption the T-case will eventually seat it once torqued down