I can only hear it when accelerating in 3rd/4th/5th gears. If I accelerated extremely lightly(slowly), there is no whine (that I can hear). If I get aggressive, other noises seem to drown out the whine (maybe just imagining the whine is there). Otherwise this headache inducing whine gets louder the more gas I give. Speed has nothing to do with. Hills (up or down) don't make a difference. Only when accelerating in gears 3/4/5. Any ideas?
Makes me think tranny/diff.

I can only hear it when accelerating in 3rd/4th/5th gears. If I accelerated extremely lightly(slowly), there is no whine (that I can hear). If I get aggressive, other noises seem to drown out the whine (maybe just imagining the whine is there). Otherwise this headache inducing whine gets louder the more gas I give. Speed has nothing to do with. Hills (up or down) don't make a difference. Only when accelerating in gears 3/4/5. Any ideas?
Makes me think tranny/diff.

Got a dog-box? :D just being a jerk... anyways, depending on the outside conditions, how much of my interior of my car is installed at the time being, and whether or not I just was blazing music, I can hear my transmission whine almost on a daily basis. The engine definately does drown out the sound tho.

A thing to check would be the tranny fluid level. How many miles are on your subi? Whens the last time you had the fluid changed (trans and diff.)?

t3h turbo maybe?