When I put the car in either "D" or "R" (with/without brake pedal applied), I can hear some pretty strange, but quiet, continious "clicking" noise. Actually, it's difficult to me to explain that noise, but it's very similar to this.
If the car is in "neutral" or "parking", that noise is gone. The noise is not getting louder while I'm driving, and there's nothing strange in automatic transmission behavior, e.g. no clunks, strange noises while changing gears, etc.
I tested this with AC turned off.
The car is Honda Accord 2003, 2.4 190hp, K24 engine.
Any suggestion what could be wrong?
Edit: I made a video, here you can hear the noise.