Help changing output shaft seal

Anyone know a good t case output shaft seal replacement guide? I found one video on YouTube but it's a little lackluster. Also, anything else I could change while I have things apart? Already have a new oem seal. And this might be a silly question but is the oil leaking out of that seal my transfer case oil? It sits above the t case body. Thanks.

 

Try this, hopefully it works and isn't the one you already found.
https://www.tacomaworld.com/threads/tranfer-case-output-shaft-seal-replacement.601945/

 

Do we also have that companion flange seal and staked nut? Video was an older 4runner

 

According to the TQ spec diagrams.
Yes, there is a companion seal and a big nut.
The nut is TQ’d to 87 ft/lb.

You’ll need to find a piece of pipe that fits the seal. I like to use PVC, it’s plastic and doesn’t seem to beat up the seal too bad when driving it in. As for the size pipe you need, I don’t know. Never done one yet. Take the new seal to the hardware store and start matching

See here
https://www.tacomaworld.com/threads/the-torque-spec-guide.318116/