I have a 2001 civic and when I start driving in the morning I hear Metal sounding Ca-Chunk, It happens after about 1000 ft or so. Also I notice when I am driving less than 10 MPH and idol forward I can hear a repeated Metal sounding Thump. Just wondering if anyone may know what this may be before I take it in for service and get hosed since I have no idea what it is. Is almost sounds like when you run over a rock and it comes up and hits the underside of the car. Thanks.