Having an issue.. 96 5.8..Push button 4x4 works fine. One click on module behind kickplate and its engaged.. Shift to neutral push 4x4low and module clicks multiple times. I hear a klunk as if its locking in 4 low. But 4x4 light goes out and im back in 2wd... it sure sounds like actuator is doing its part.. but idk... any advice.. tested shift module and its good.