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The flange for the intermediate shaft has a seal that can leak.
The original has a single black o-ring - the one on the left. Then Porsche changed the design to an orange seal with several sealing ribs (I think 4). This was about 4 years ago, maybe longer.
To get the updated seal you also need to replace the flange.
The clutch on my 1997 with 67,000 miles was replaced last with. I had all original seals. There was a slight seepage from the back of the engine. So I went with the newest reseal. New case bolts, new RMS, and new flange.
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