I have a 1987 big bear and I cant find the oil drain for the transfer case. I see what looks like the fill on the leftside of the bike midway up the transfer case. I have it on a lift and I still cant see the drain.
Thanks in advance,
Bob

 

The middle is lubed by the engine oil ,the only thing that needs gear oil is the front and rear diff. Atleast I hope so because that all I did with my 89 350 4x4 BB.

 

Just changed engine oil on my 1996 350 , on bottom of transfer case there's a 10 mm bolt drain from there, engine oil is pumped automaticaly into transfer case by oil pump, or just fill it up yourself.