Calling all CJ5 experts... Directly under my T86 main input shaft there is this hole between the transmission case and the adapter casting that bolts to the clutch housing. It sits below the fill line and it leaks, so "There's a hole in the bottom of the sea." So yeah, it leaks. See accompanying photo. There are threads inside, and since it's below the fill level, it seems that a "threaded something" must go inside to prevent it from continuously leaking. I don't see the part listed on the exploded diagram in the service manual. I have the transmission out and I am going through the seals and gaskets because the T86 and the Dana 18 T-case are both leaking...badly. Who knows (by that I mean, does anybody know) what that hole is, what it's for and what, if anything, threads inside to prevent the black sea from leaking. Thanks in advance!