Cant find source of trans leak

[fixkick]

your post sounds like me , under car thinking the same way.
like this.
who would use 6mm female, square drive, in any transmission drain, dang, and 3/8" strips it out. and the correct tool is not in any car parts store, here. they look at you like what?
yes, I have one but took long time to get here far far away./
you need it for the transfer case.

that slot above is very nice to have if either seal inside fails. (its a great early warning)