Can we at least know the year?
True: It depends....what year and model are you asking about?
-Steve ('94 EB 4x4)
True: The transfer case in a 1994 Explorer takes transmission fluid. The same type fluid you put in the transmission, dex.III/Mercon. You can do this yourself very easily while underneath the truck if you are mechanically inclined in the least. Also the auto hubs can be serviced yourself, they are a little trickier, but with even a minimum instruction book like the Haynes it is quite easy. HTH.
-Steve ('94 EB 4x4)
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