I know someone who is trying to replace a faulty rear locker actuator. He says the new actuator works fine while not connected to the diff, but as soon as it's bolted up it stops. I have no further details than stops. The only thing I can think of is the actuator and diff are not fully "in-sync". I have suggested he attaches the shaft and cycles the actuator before mounting it. Any other suggestions? Cheers Ian EDIT : Is this the first technical question on the forum?