I have a 1990 tracker 8v 5sp, now the problem i am having when it is cold out the tranny whines.  I thought the oil was low i checked it and it was fine so i checked the transfer case it was full.  Now when it warms up about 5 miles at 60mph it goes away. Any ideas.  Also what weight oil should be in the tranny and transfer case.  One more ? what weight oil should i run in my motor i am running 10w30 and i was a quart low but no visible leaks. Any ideas on that also.