I have an '07 and have the same experience. I don't notice the whine unless I really listen for it. Using a heavy gear oil like Redline Shockproof Heavy will help, but my whine was never something that bothered me, even when new.
Anyway, what year did they begin using the helical gears for 1st and 5th? Was it '09 or '10?
Anyway, what year did they begin using the helical gears for 1st and 5th? Was it '09 or '10?