2000 Subaru Outback automatic. Fluids check fine. Started driving and heard a loud metal sounding bang, bang, bang. Does the same in forward and reverse. At very low acceleration there is a pause like its a delayed catch in the driveline or something. I really don't know how to explain it well. I've had problems with the driveaxle on other cars but this seems different. Not turning or anything during the sound. Its not loud unless you are driving normal speed but there's definitely something I'd describe as "loose". I've only been able to look at the welds and bolts below and haven't seen anything that looks like its broken yet but its begun to rain so I've had to come in. I'm thinking driveshaft/driveline or ujoints. Can anybody steer me into a troubleshooting procedure? My manual isn't much help here but I haven't really gotten greasy enough yet I guess to know anything.