Used ARB Airlocker taken from Dana 44.
Removed as I was sick of replacing o-rings and over it!
The seal housing is apparently worn and that is the probable cause of the leaking air, It could probably be machined or replaced and maybe you will have better luck with it.
Sold as is.....No external fittings, this is for the locker only (what is in the pic).
http://www.arb.com.au/assets/air-loc...tion_chart.pdf