Finally I have some fluid coming out of my axle tube breather when the ARB locker is engaged. Does this mean the o-ring is failing? Or is this fairly normal?
if it was me on your timeframe, I would disconnect the breather, blow it out and run it with the breather connected again - then I would disconnect the ARB line at the solenoid, then disconnect at the diff and blow it out, too - connect on both sides again, run it
this is under the assumption that the ARB otherwise locks just fine - ?