For some reason, this AMS unit is much louder than the one I got over the summer. Specifically when it’s running the motor quickly. It’s this loud for all 4 slots too 
Any thoughts?
I’m having the same issue, have you figured out whats causing it and how to fix it?
Sadly I didn’t. I just swapped it with my quieter one that’s isolated from our living spaces.
I can tell it’s somewhere in the gear assembly, but I haven’t had time to troubleshoot it.
I had this noise today, after removing and refitting the inner tray of the AMS. The noise was caused by one of the 2 wires that connect to the rear of the unit, rubbing on the AMS assist motor gear (white nylon gear). I moved the wires out of the way, and the problem is sorted. When the AMS is fully assembled, this gear is very close to where the PTFE tube exits the rear of the machine (just so you know where to look).
Hope this helps,
Mick.
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Thank you! I’ll get this checked out tomorrow after my overnight print finishes.
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Thank you!
Had this same problem with a new AMS, this fixed it for me.
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Thank you, im going to try that!
lol I took the two screws out in the Ams to see underneath. I saw nothing amiss, put it back together and magically it’s not making that sound anymore. 
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