So getting my trans back from shep this week. I notice there is a big and little o ring between the transmission and transfer case. Is this all that needs to be replaced to prevent leaks. Does anything else need a gasket or silicone when re installing. There is a lip on the transfer that slides onto the trans I didnt know to silicone or not. Any help will be great. Just not wanting it to leak!

 

You just need those o-rings and that's it. You don't need to put silicon anywhere else.