Newbie FiST owner here. Bought a 2017 one owner bone stock with 35K on it. I have read a ton of transmission threads but cannot determine if what I am hearing is the dreaded input shaft bearing. When in 5th or 6th gear and only when on the throttle I get a noticeable whine. Once I let off the whine is gone. Have to have the radio on or it sounds like straight cut gears. Trans shifts and drives fine, but I do hear a very tiny rattle when the trans is cold getting into 1st and 2nd when releasing the clutch. The rattle goes away as soon as it is in gear, and have only heard it when first driving the car, it goes away after a couple miles. Is this the input shaft bearing? Or is this just the nature of these transmissions?