I have a 84 fj60. The guy I bought it from told me the original owner hated the 5 speed and got a 4speed with a overdrive installed. I know nothing about this overdrive. The picture attached is of the side of the tcase. I looked up that company and they seem to have been popular with Land rovers. The transfer case look stock aside from this plate and having a 3rd lever inside the vehicle. The tcase is leaking and I need to reseal it. I'm wondering if this would be a toyota transfer case with some aftermarket inner workings, or if the whole transfer case is aftermarket? Would anyone know? And where to get gaskets and seals for it. Thanks