I have been having a weird issue with my factory rear locker. For years both the front and rear lockers worked perfectly. A few months ago my rear locker started to not engage and the light would just blink. I replaced the solenoid on the rear locker since it is cheap and easy. On my first drive right after that I pulled into a gravel lot and both lockers immediately engaged. I thought I had fixed the issue. I messed around in the lot for a minute and while backing up I heard a pop from the rear and the light for the rear locker started blinking again and I could not get it to re-engage. This weekend I checked the rear diff fluid and it was low. I thought maybe somehow that was causing the locker to not engage. I filled the diff and drove to the gravel lot again. Once again the rear locker immediately engaged but it seemed almost like it was bound up and again after putting the vehicle in reverse the rear popped again and the light went from solid to flashing and would not re-engage. I am not sure where to start to address the issue. It seems that the wiring is fine, and the actuator is working. It is almost like maybe the actuator is not allowing it to fully engage which is why it pops out. Any tips or ideas would be welcomed as I would like to get this fixed as soon as possible. My son has an offroad trip planned for us in my 80 and his tacoma with a group of jeeps in a little over a month and I do not want to give the LC a bad name if it is not functioning at 100%.