So this topic has lots of discussion but I can't find my issue in any of them. My stock rear locker doesn't work reliably but there are no other symptoms. The lights on the dash work correctly. I push it down once and the light for the rear blinks for a second then goes solid. Push the switch down a 2nd time and the front does the same thing. The fronts work perfect all the time. The pumps seem to work correctly. When I activate the rear locker the pump turns on for a second or two and then shuts off. I removed the hose from the pump and it ran until i covered the nipple with my finger. I then removed the line from the diff and the same thing. The only thing I notice is once in a while I hear a blurp from the pump and that happens even when I block the nozzle at the pump. Now this is like every minute or 2 and only for a split second. Is it possible the pump is bad and that is causing my issue or can this be more involved inside the gears. How would I test the pump to see if its the issue? I've heard the rear diff lockers can have issues on these dana 44's. Any thoughts would be appriciated.