Chevrolet: 2004 Malibu, soft shifting sound

Hello All,
I've recently bought a presumably clean chevy Malibu LT, 2004. The car
looks great and is solid. However, this soft sound is bothering me.
When the car starts to move, as if it is making this soft shifting
sound, like a soft click. It only happens or I hear, when the car is
just moving or slowing down (not at high speeds at all, usually < 20
km/h, or 14 miles/h). I tried to see if it is linked to power
steering, even going straight i can hear the sound. Also I've noticed
before i come to a complete stop, i can also hear the sound. I still
have the warranty from the dealer, but want to get some info before
taking it to them. I'll also let you know what they'll find out.

Regards
mk