Easiest way to change transmission output shaft seal?

[1Sinner]

Spicer 3053 overdrive. Can I just pull the jackshaft and input flange and pry the seal out, or is it necessary to pull the output bearing retainer and install the seal from inside the cover? Or am I looking at this the wrong way?

 

[Welder1]

Spicer 3053 overdrive. Can I just pull the jackshaft and input flange and pry the seal out, or is it necessary to pull the output bearing retainer and install the seal from inside the cover? Or am I looking at this the wrong way?

If I remember correctly you will have to pull the retainer housing the seal mounts from the inside. You will need to drain the oil first. Make sure you seal the bolt threads they go thru the case and can leak oil if you don’t.

 

[gringeltaube]

That seal mounts from the outside, so yes it can be pried out and a new one installed after just removing the output flange.
Obviously, having the bearing/seal retainer housing also pulled out, makes it all much easier; especially if you have a small shop press.

There is no need to drain the oil since the max. level is at least 3" below the two bottom screws of that retainer.
If you decided to pull it then yes, use RTV-sealant to seal the (clean & dry) threads of those 4 screws.
You also need the correct thickness paper gasket for that. Reusing the old gasket + RTV on both sides may also work. Do not install without a gasket because it will deform- or even crack the housing!

 

[Welder1]

That seal mounts from the outside, so yes it can be pried out and a new one installed after just removing the output flange.
Obviously, having the bearing/seal retainer housing also pulled out, makes it all much easier; especially if you have a small shop press.

There is no need to drain the oil since the max. level is at least 3" below the two bottom screws of that retainer.
If you decided to pull it then yes, use RTV-sealant to seal the (clean & dry) threads of those 4 screws.
You also need the correct thickness paper gasket for that. Reusing the old gasket + RTV on both sides may also work. Do not install without a gasket because it will deform- or even crack the housing!

Ok I stand corrected again it must be the transfer case I was thinking about. I know one of them mounts from the inside.


Eddie

 

[gringeltaube]

I know one of them mounts from the inside.

That's correct; it's the seal for the T-case rear output.