Buzzing from transmission on deceleration due to normal gear backlash on Honda S2000

A buzzing from the transmission when decelerating from 3,000 to 4,000 RPM can be caused by normal gear backlash noise in the transmission. Honda has an updated clutch disc to help reduce the noise. 

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Average mileage: 106,000 (70,000–142,000)
3 model years affected: 2000, 2001, 2002
5 people reported this problem
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problem details
2000 Honda S2000 142,000 mi,
Buzzes when you let off the throttle at around 3000-4000 RPM
2001 Honda S2000 70,000 mi,
Just bought the car, I never took the car to be inspected before purchasing it. I realized this buzzing, humming vibration noise first day after I bought the car. Took it to many places to be looked at and everyone had a different story. Its been a month and I still haven't found anyone I trust or believe knows from experience what the heck this issue is. Just from my research and reading great articles like this I would imagine its one of three things, transaxle, clutch, or transmission. Anyway annoying noise hope its not going to do more damage and hope I can find someone reputable that knows what there doing.