I assume this is normal. My 15,000 mile car does it too. I think it actually has to do with the Drive-by wire throttle. I reset the throttle memory and it went a way for about a hour, then came back. I wonder if the Sprint Booster would fix this. It could also be the SC Clutch I guess, but I've never heard any kind of chirp associated with it. I know it only does it under light throttle input. If you give a fair amount of go pedal, it doesn't do it.