I have dealt with leaking air lockers and if I was to start over I would go toyota elocker. the harrop elocker has a major flaw, it unlocks when changing direction(forward /reverse) until at least half a revolution of the tire and then locks again. no thanks. waay to expensive to have limitations. I would only consider it for the front, if at all.
I'm running Toyota E-lockers and I'm having problems with my rear actuator. I knew some Air lockers develop leaks so I was considering selling all my Toyota e-locker stuff and buy a pair of Harrops but I did not know they had that flaw. No system is perfect I guess, thanks for that info Liveoak, I guess I'll keep the e-lockers I already have then.