NEEED HELP!!! So my 4wd doesnt work and my actuator does. i have the motorized actuator and i have taken it out and verified that it is working and i have made sure that my 4x4 light comes on and everything electronically is working. but the front diff is still not actuating. i was able to get the actuator actuated with the transfer case disengaged to see if i could get the front driveshaft to spin with the wheels and it doesnt. i have also been able to turn the driveshaft by hand with no movement in the front wheels when the actuator is actuated and the transfer case is not. is my front differential toast? or is there something else i should check?