Are you certain it goes away at ~2k RPM's, or is it just covered up by the aftermarket exhaust? Do you hear it only when in gear driving, or can you hear it stopped, shifter in the neutral position, clutch fully depressed? A little more info would be helpful.
It a very distinct sound and yes it goes away. It's extremely high pitched. I roll my windows up and hear it through the door only while in gear. My tranny has a very soft whine and this sound is different. I can make this sound in all 6 gears at the same excact RPM range.
Going tomorrow to get it checked out btw.
2012 GT Black Premium 6MT, 20" Black Foose Nitrous Staggered.
MODS: Airaid CAI, 93 BAMA Performance Tune, Roush Axle-Backs, GT500 Splash Guards, Shorty Antenna, Steeda Black Shift Knob, Extra Chrome Trim, 3rd Brake Light Decal, Aeroforce Interceptor Gauge w/ Roush Vent Pod, Valetine 1.