Bear in mind that the transmission will "growl" loudly with a single mass on the highway when your lugging the engine.
This is my experience at least.
Mine as well. Accelerating from 1500 rpm to 2500 rpm in high gear under wide open throttle produces a loud "whine" or "growl" in both my single mass flywheel Z's. Marc confirmed that the noise is normal.
05-19-2011
Re: Fidanzza flywheel and transmission 10W60 oil?
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