What TC in 86?

On an 1986 Jeep Cherokee with a 2.8 & 904 Transmission, which transfer case does it have? There is a 2/4 switch on the console & the 2wd/4hi/neu/4low lever next to the console.

I have a leak around the rear 1/2 & need to find what seals I need & how to change them if anyone can help me out here!

I was thinking mine had a 208, but it must be the 229, as it does not have a disco axle.
Anyways, I thought my rear cone had a leak and removed it & re-sealed it but it still leaked & upon further investigation there is a hole on top of the transfercase (no not the vent line in the tailcone) that fluid was leaking from. Does anyone know whf this hole is for? I pulgged it with a "vacuum line terminator" of appropriate size for now.