ARB Air Locker Solenoid Leaking Gear Oil

I was told by ARB Support that I should always release the pressure from the system after use. This is especially important in areas with freezing temps as moisture gets trapped in the manifold.

 

Sorry for reviving a dead thread, but, if anyone is looking for a potential answer for this I might have a solution.

Check the bulkhead fitting where the copper airline seals.

I was having the same issue with my 9.5" rear locker RD152. Turns out either I forgot to tighten, or it came loose, the inner phillips head fitting in the bulkhead fitting that the copper line gets sealed with 2 orings and a spacer.

I had only noticed it because when I was cleaning the line out again, I decided to swap out to the banjo bolt angled fitting like I have on the front thinking maybe that was the issue, but then it wouldn't thread all the way in.

Put a Phillips screwdriver in there, and sure enough it was loose.

I know the

$1,110 RD129 Air Locking Differential

RD129 is different the way it seals, but the only thing keeping gear oil out of that line is the rubber oring on that one as well, worth a shot to check it out

I haven't driven it yet to confirm but I'm pretty confident that may have been the issue. I'll report back if that fixes it after about a week or two of driving.