My 2007 Big Bear will not come out of 4x4. When I put it in 4x4 you can hear the servo turn as it engages, but it will not go back into 2-wheel drive when I release the button. The diff lock will go in and out okay and I can hear the servo turn in both directions as I push in and release the button, but the servo only engages 4 wheel drive. I took the servo apart and checked the motor and when bench testing the motor it will fully run in both directions and stops each way as it should so the motor seems to be reversing okay. I reclocked it and hooked it back up and the same thing. The servo engages 4x4 but it will not disengage and go back into 2x4. I can't figure out exactly what causes the servo to go in the opposite direction to disengage 4-wheel drive. I assume it is something electrical and I have gone over the factory wiring diagram and can't figure out exactly how the switch or whatever causes the servo motor to reverse and slide the shaft back into the 2-wheel position. Since the 4x4 system is basically the same as on the Grizzly's I am hoping someone can help me figure this out. The same servo was used on most Grizzlys and Rhinos from 2008-2014.