Here is something you can try. Before our next outing, find a 1/8 pipe plug and put it in the drain hole of the bellhousing. After your ride, remove the drain plug and see what comes out.
I don't think a blcked PCV is your issue. But it is possible the fording valves are wired wrong. I have seen (once) where the arm was 90° out and the valve had been wired closed instead of open.
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