I too have this common leak too. But, I found the previous owner had overfilled the primary case. While fixing this issue, I ran into another problem. I purchased James Gasket Primary Gasket Kit - JGI-25352-00-KF through Dennis Kirk who said it would fit. but...The primary and shaft gaskets don't...20161226_164458.jpg20161226_164458.jpg20161226_164438.jpg