Hello everyone. I installed an ARB Airlocker in my rear differential, along with the small compressor from ARB. Been installed, for about a year with no problems, but I've only engaged it about 2 times. The problem occurred after a fairly long drive home on the freeway this past weekend, about 1 1/2 hours each way. I saw a wet oil spot on the driveway under the driver's side fender. I traced it down to coming from the ARB compressor that's mounted on top of the driver's fender under the hood. At first I thought the compressor must contain oil, but I read that they do not have oil in them. What I read on line is that the problem is gear oil coming out of the differential up the compressor air line and then out of the compressor (somewhere). There seems to be differences of opinion as to what the cause is. Some people say it's the O-ring seals inside the differential. Others say it's a clogged vent. Some people just live with it. Anyway, I've never read any discussion, here, regarding people having a problem like this with their compressor. A couple things I intend to do. One is to verify the vent on the differential housing is not clogged. The other is to verify that the locker still engages properly. If anyone has had this issue and solved it, I sure would like to hear from you. Oh, I forgot to mention I don't seem to have the problem on short drives around town. Thanks.