i have 2 stream 6010s one is perfectly silent and the other is making a fast clicking. i saw your thread on the 6100 making noise and took the entire thing apart completly and cleaned off all calcium deposits and gunk. i re checked everything again when i was putting it back together it all looks perfect, brake shoes slide in and out smoothly the red vibration dampener ring is in place correctly and the top and bottom bearings are on straight. the unit is about 2" under the water and doesnt suck in any air so i dont think its air trapped in the drive unit. any other suggestions on fixing the noise?