So I have had my 06 STi for over 4 years and its gone through some motor problems but everything is good now. But most recently I have noticed in the past 2 weeks that right before it was time for an oil change the car started to make a whining noise which I think seems to be the trans. It still is audible in low gears and probably any other time but you cant hear it over the exhaust. I do have some exhaust leaks from the mid and down pipes but it just seems it has to do with the tranny. Fluid is not low either. Check anything else? Does anyone have anything in mind what it could be. Im usually good with the different noises my car makes and pin point where it comes from but not this time. Help please?