Noise is the hardest to diagnose over the internet. If I am to suggest, I would check your transmission mount.
The next time, open your hood. Have an assistant back up the vehicle (slowly) and you, looking into the engine compartment, try to see if any parts of the engine/transmission moves or does something out of the ordinary as the vehicle is moving. Try to localize the sound. Upload a picture if you can.
Monday, March 2nd, 2009 AT 12:05 AM