Squealing noise when backing up

[16v of E30]

So ive noticed that when i back the car out of the driveway in the morning, I get a squealing deep sounding noise from under the hood. It only happens when the car is cold, Ive ruled out the rear brakes, and front brakes, and i can kind of feel it in the steering wheel... WTF eh?

[jlevie]

Check the belts. Old glazed belts can squeal until the warm up.

If the belts are fresh and properly tensioned, remove them an spin each belt driven accessory to check for bad bearings.

[16v of E30]

def not a belt squeal...this is something else