blazer trans lube question

hey guys my first post on this site.my questions are,in my 84 4wd ,standard shift, blazer 2.8 liter , what kind of fluid goes into the transfer case?also im changing transmissions and it is an 87 trans, what kind goes in there? i dont have a chilton book for this vehicle.while seperating the 87 trans from the transfer case it looked like autotrans fluid. onthe stock transfer case it looked like gear lube???? any help would be great thanks

Both use transmission fluid.