My ronin S motor clicks when moving the motor up and down. Only used it a few times.  My though is my canon 80D with a sigma 1818-35mm lense its heavy

Hello, is it normal if my auto tune motor parameters test sounds like the gears or grinding on my ronin rsc 2?

No that is not normal. When placed on a table the motors should not do anything. If the camera is off balance, then maybe they are trying to compensate. I have this same issue and I updated to the latest firmware yesterday as soon as I got this gimbal.

Maybe the previous firmware was fine? I am not sure. But this has to be addressed by DJI else they are going to have a lot of returns, including myself. I use a Sony A7 II with the 28-70mm lens.