[miker]

I've had good luck using Permatex High Tack Spray-A-Gasket Sealant on the transfercase gaskets. It does not add any thickness to the gasket so won't change the bearing preloads once they are set up right. Its very thin but very tacky and seems to keep oil from wicking through or past the gasket. Just don't apply it until you are sure you are ready for final assembly, until then, just install the gasket dry for setup.

One tricky part on the orion for oil leaks is the idler shaft o-rings. For me, I found that they were easy to cut or nick when installing the idler shaft. I think the newer Orions come with the shaft and gear already installed so this might not be a problem for most installs these days. I did mine several years ago when AA did not preinstall the shaft in the case.

Here's a pic of the Permatex. Easy to use because its a spray. Just be sure to clear the nozzle after each use otherwise it could clog. Nothing new, typical rattle can technique when you don't use the entire can at one time.