HELP: clunk…cluck…cluck noise

[crios]

Hi all,

My car is making a clunk…cluck…cluck noise. I’m trying to figure out what it could be. Bases on the below info, where do you think I should be looking?

-Engine needs to be at normal operating temperatures to make clunking noise.
-Noise sounds like it coming from the rear drivers side wheel area.
-Noise only happens when car is in gear, accelerating or decelerating within gear. When clutch is engage, noise stops.
-Noise does not happen if car is at a stoplight, stopped, or freeway speeds. It only happens at street speeds.
-Noise frequency matches the speed of the car, but like mentioned above, goes away at freeway speeds.
-Noise happens regardless of surface or if driving straight/turning.

Here’s a typical day. Pull out of drive way, go down the suburban streets, speeds about 55, car is warming up. Once car is warm, noise starts as I hit street lights/stop signs, noise continues and get's louder….jump on the freeway, speeds of 65+, noise goes away….hit streets, noise is faint. Park car, car cools down, couple hours later, noise is gone, until engine is warm and hitting stop and go traffic, noise starts again.

This noise started happening about a year or so ago. I took into the dealership and they said it was a dirty stuck brake caliper. They cleaned it and the noise went away for about 3-4 months, then returned for a day, then went away... returning here and there throughout the year. For the last two weeks, the noise has not gone away and I’ve cleaned the brake calipers.

Thoughts?

Thanks,
Cesar