hey guys..sorry to bring a old thread from the dead but i am switching to 3:73 gears and i was told by my installer that i need a tuner or a speed calibrator so my speedo reads correctly.. now my car is pretty much stock so i going the calibrator route. i found speedcal for 99 dollars w/shipping. can anyone tell me where this thing supposed to go?? is it in the dash or at the trans?? just curious i havent ordered yet but was just wondering..thanks..