[srbianats]

Hello all. I have a 2005 Trailblazer EXT 4wd. I have an issue with my front driveshaft. I have been hearing a squeeking in a tin can kind of sound. It is kind of hard to describe. I thought front brakes. Checked them and they are fine. I crawled up under the front end and took off the skid shield to look around. Since it was in 2wd I tried to turn the front driveshaft by hand and there was the sound. The driveshaft does turn and the sound was appearing to come from the front diff. I thought "Oh Crap" is there fluid in the front diff. It would make sence if it was empty to make a sound like this. I unscrewed the filler hole and there was fluid. Then I decided to flush and fill the front diff with fresh fluid. It was pretty dark and I don't know when the last time the front diff was serviced. I took it out for test drive and still have the noise. What i am asking now is what to look for next? Like I said, when turning the front driveshaft by hand in 2wd it makes that sound.

Edit: By the way, 4wd works just fine in all modes.