[MikieB]

Found problem. It is the transmission solenoid cycling.

So is it really a "problem?" or is it supposed to do that? I noticed mine makes a sound when I shift from R to D and take my foot off the brake to start driving forward. I describe it almost like the sound of the AC compressor kicking on, but I don't have any climate control running. It only does it that once and then I never notice after that.