Heres the problem guys... After putting the blazer in four wheel drive, I noticed that the transfer case would start making a whining sound.. really high pitched, like a bearing going bad. So, yesterday, I changed out the fluid- replaced it with Dexron, as recomended by Chevy for my year, and the noise is still there, except now it makes it in 2wd occasionally too, around 15-20 mph. The old fluid came out black (I have no idea on if or when the previous owner ever changed it), but it didn't smell burnt. What could be causing this whining noise, and what can I do to fix it? Where did all these damned dirty apes come from!?!