Originally Posted by adamantine

so I pulled off the differential cover; the ring gear and pinion seem to be ok, but I ain't a mechanic. Looked nice and smooth. No metal pieces in the oil.

I visual checked the wheel bearings. Looked ok. Just to be sure, I pulled out both axles and run the car in gear. The noise is still there! So it should be something in the differential. Maybe bearings.

I heard that servicing differential require intricate settings that is better left to a professional, is that so?

I probably be heading to a boneyard soon...