I know my desription sucks. It makes a noise u don't hear when it is in park. I just went out to listen to it and didn't hear it. I wonder if it needs to be warmed up to make the sound. It could be related to the other noise I have thta is posted in another thread.
Need more information. When you say louder in gear, what exactly is going on? Are you remaining motionless and merely put the car into drive (but not moving)? Is the car at idle... and in gear? Are you giving it any gas... or simply putting it in drive and keeping your foot on the brake?