transfer case gaskets?

hello,

see here:
http://nissan4u.com/parts/sunny/el_n14/1990_12/type_49/power_train/transfer_case/

i have used instant gasket in the past because i was in a hurry, but i want to know if there is a real nissan gasket that goes between the outer casing, middle plate and inner casing?

there is not one in this picture and my research has come up with nothing so far?

any thoughts?

There are no gaskets,so do not worry.