I'm curious about what causes this sound I'm hearing. On downshifts I hear what reminds me almost of a turbo diverter valve. I've even had passengers comment on it when the windows are down.
I'm just hearing about all sorts of things to look forward too when I get our '18 A10 home.Mine does the same thing. It sounds like a slight whistle when the trans upshifts. Its been there since day one and after 7K miles is still there. No idea what causes it.