It's good to know that it a rare leak, but I'm pretty sure it's the leaker. I cleaned the area and watched it build up in the space between the engine and transmission and drip. I will be doing a value adjustment soon and will replace the gasket then, maybe it's leaking down somewhere I don't see.

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800