Join Date: Feb 2011
Location: Canberra, Australia
Car Year: 2010
Car Model: Forester Diesel
buzzing, scraping noise
Some non-drivetrain suggestions...
1) Aerodynamic effect on a loose piece of plastic shielding e.g. plastic guards underneath. Once had a loose plastic shield contact the driveshaft intermittently, especially on corners. Caused by a misshapen new shield I'd fitted to replace the broken old one! Ended up having to trim the new one back.
2) Loose metal shield, eg heat shield somewhere?
3) Loose exhaust system or exhaust system component e.g. mount, resonator plate. Once had a loose exhaust set up an infernal buzzing at certain speeds/throttle positions/rpm. I checked the exhaust system myself for security, it seemed tight to me and was sure it was a resonator plate in the exhaust. But the dealer found the system loose, tightened things up properly and the noise never came back.
2010 Forester Diesel