Volvo FM9 Live Drive Chatter

Hi, I have a 2005 Volvo FM9 that has a chatter coming from the live drive. I removed the live drive and the cog in photo 2 is loose, you can move it with your hands(like the bearing has collapsed) is this normal or not? I ahve had them in the past where they are a little noises but this one is a lot louded. I tried to record it but it doesnt sound to bad on the video. Any suggestions? Cheers, Nick

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