Low frequency drone/vibration at 60ish mph

[bevestrown]

I've been able to figure out everything with this car over the years by lurking, but this one I had to make an account for. Having an eirrly simlar issue even down to the recent clutch job from a failed TSB. My only difference is I'm at 91k, in a BRZ and the tone is from 55-69mph


Did you ever figure this out LotsaMiles?

Originally Posted by LotsaMiles

Cut to the chase:

I have 163,000 miles on my 2013 FR-S. I've noticed a sound that I originally thought was just road surface related, but can now say that it is drive train related. And it is simple. He're a bulleted list of facts:
1. At around 59-63 mph there is a solid vibration "tone" at around 50 hz (I'm a hi-fi buff. It's lower than a 60 hz AC hum by a little) and then completely disappears as my speed increases.
2. Road surface is irrelevant.
3. It is there regardless of what gear I'm in, and even if I take it out of gear and coast.
4. I don't know if it's getting louder, so I notice it more, or if it's just that as I have listened to it closely over the last few months it is just more apparent to me.

FWIW have not replaced any bearings on the car, and I've had it since 11k. Did new brake pads right after the shop did the new clutch/flywheel about 7k ago