A friend bought a car with a drip from around the trans pan. Looked like it was seeping down from the connectors for the cooling likes (to the radiator).
Replaced the o-rings but also pulled the pan as the gasket seemed squished out.
Looked like a new cork gasket w/ RTV blue. Had been overtightened until the gasket was cut in half most of the way around by the ridge in the center of the pan face a la "It leaks; bolts must be loose".
I've never - not once, ever - had success with a cork transmission-pan gasket on a 240. eEuro still sells them I think.
I've had better luck with RTV and no gasket.
Reminder that the later AW transmission pan-bolt torque is about 50 in-lbs.
(2 pics in gallery)

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240 drivers / parts cars - JH, Ohio
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