Yeah, the problem started for me pretty much right away and I noticed it within 2 weeks. The issue is when you drive a lot on the hwy and pressure builds up in the rear diff to the point that some of the diff fluid is pushed back up the line. Once this starts, a siphoning effect happens and the line will literally completely fill with fluid as it sucks it up from the diff. It will drip slowly out of the solenoid at the compressor and "puff" out and spray everything around it with gear oil. I found out because I could smell it. Nothing else really smells like gear oil. Then I noticed a little spray once I looked for it, and the solenoid vent for the rear locker was wet with gear oil. Note that for me, this only happened with the rear in my Trooper, because that is what is spinning all the time. But with the VX and TOD, it could happen with both front and rear.
This is a KNOWN issue with older application style ARB air lockers. You will find loads of threads about this exact problem on just about any 4x4 forum. I think this is why ARB sent me the Purge Valve Kit for free. They didn't come out and say it, but it might as well have been an admission of guilt, and a good gesture on their part.
Bart
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