That makes sense. Okay, if you are certain that the differential is not over full, you haven't taken if off road where water could have gotten in there, the most likely cause is the vent itself or the hose is plugged or bent causing excessive pressure to build up. Once enough pressure builds, it basically blows through the restriction causing gear oil to come out.
What I suggest is to first, make sure the diff is full. Then, remove the vent hose and vent and inspect them. Make sure all is clean. If the hose is good, replace the vent and that should take care of the problem.
Thursday, October 23rd, 2014 AT 5:01 PM