Have any of you ever experienced or read about a high pitched noise coming from the rear drive unit while driving? I can best describe it as a high pitched electrical noise that oscillates up and down as you adjust the power pedal. It's not incredibly loud in volume but it is very annoying to the ears. I'm currently battling with Tesla Service on this issue, they keep saying everything is normal but real life experience says otherwise. I'd like to know if anyone else experienced this and what the resolution was so that maybe I can pass some info to the service dept. This is definitely NOT the normal drive unit noise which I can also hear and is a pleasant sound! I hope I was descriptive enough. Thank you!