hey guys i got a frustrating problem.... i just bought my 2011 fj tt and when i,m driving on the freeway at speeds ranging from 60mph to 80 mph a loud humming noise starts and gets louder as i go faster. it sounds like theres a hole in my firewall or something. the sound seems to come from the air vents next to the windshield wipers. it's weird cuz it starts at different speeds and sometimes starts past 80mph and if it's windy it will start at lower speeds.if there is anyone out there that had a similar problem can you please help!!