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I had a similar leak problem. After carefully replacing the flywheel seal, I noted that the oil was also seeping from the top of the engine. In particular the oil breather and associated sensors etc. Replaced those seals also, and problem solved. Problem of course with oil, it will travel everywhere. Since you're at the back of the engine anyway, it's easy to replace the other seals on top - preventive maintenance if nothing else too.

Good luck.