The gear slipping noise is the sound of a door lock actuator that has worn out. As you have heard and guessed, there is a gear that is slipping. Continuing to drive it as it is will not cause other problems. The actuator will get worse. So if it is currently still pushing the door lock as needed, eventually that will stop happening. I was hoping to give you a diagram of the inside of the door and the actuator, but it does not appear to exist. Please let us know if there is anything else that we can do for you.
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Tuesday, May 15th, 2018 AT 8:32 PM