Hello Richard....I had that noise in my gimbal also but not as loud and it was random. Had it where I bought it to check my updates and they alerted me to the noise although I heard it once before and took very little notice of it. The longer it was turned on for the more it made the noise. Anyway I sent it away to DJI to get looked at and they replaced a motor in the gimbal.Hi, I have never crashed this or dropped it, but its started to randomly make this grinding noise??