Today I went to Discount Tires to get my A/T's rotated. After taken the front right off I saw a fluid on top of my diff. I crawled under and found it was coming from the breather hose, so I thought. After the tires were done I drove over to AutoZone to price some pads. (Next to do) When I got out I took a look under the truck and found a butt load of the same fluid that I had just wiped off. Upon looking closer I found that the little piece the screw attached to had actually backed out. I bought some better hose clamps and switched it out after tightening it back down. It actually turned a lil over a full turn.
Anybody have an idea why this happened? What could have happened if I had not caught this?