After some light wheeling I noticed a odd squeeling from under the truck when I would lift from the accelerator going around 20 - 30 mph. At first I thought something was loose and rattling but I could not find anything. When I looked under it again, I noticed a small wet spot on the street. Right above it was where the rear drive shaft meets the transfer case. You can see a small drip in the pic. The full res can be found here: http://fj62.net/images/drip.JPG While driving today I did not hear the squeal except for when I drove the truck in reverse. Any ideas?