Sorry , I didn't realize we were talking front. If it's a front diff with 5/8ths studs , but doesn't have the dual wheel adapter on it , it may have been out of a 1 ton SRW truck. Is this a open or closed knuckle axle? Could also be out of a old 600 or 700 series ( 2 ton ) . Either way you have a pretty stout piece.
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