Well today the weather was fairly nice so I had the windows down for the first time in a while. Noticed that when I'm in gear and press the gas I hear a whirling noise. Kinda of sounds like straight cut gears. Most noticeable I'm 5 the at about 50 mph at half throttle. It's an 08 5spd 78k. I'll check the trans fluid level tomorrow. Anyone has this prob? Differential bearing? Input shaft bearing,