So I'm tooling down the road and hear this whine/grinding noise when I let off the gas (coasting with the clutch pedal out). After some thinking and listening when I accelerate, push the clutch in, coast with the clutch out etc, I decided to drain the rear diff (1999 Taco e-locked) and found the fluid looking more like black metallic paint than anything else. Also dumped out some small round metal pieces. I'd post pics of them but I don't have any webhosting for pics. Obviously something in there came loose and was eaten. Anybody had this problem? Any clues? I'd like to know what I might be looking for before I pull the third tomorrow.