Whenever I turn my radio off and put down my window, I can hear a slight whirring noise, however whenever I depress my clutch pedal it goes away. Is that the pilot or release bearing going? And if so, should I just change the whole clutch out? It is well used, and probably could use the change - but if I do change it out what clutch should I go with? This car is just a daily driver, other than perhaps one burn out a month, it only gets minor spirited driving.