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AWD controller oil change?

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Hoping someone can confirm.  From what I can gather, the 996 AWD controller is a sealed unit and doesn't require an oil change. There's no service item listed in the service schedule.  The 997 requires a change every 12years or 120k miles but seems the 996 does not.


Can someone confirm. Thanks

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At 90,000 miles Porsche recommend to replace the front differential oil. But the all wheel drive on 996 turbo got no controller as such. It is a viscous coupling. Viscous clutch on the parts catalog item#6. This viscous coupling is sealed and no maintenance is required....

Screen Shot 2020-09-29 at 10.29.33.jpeg

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Yeah. Porsche seem to call it a "Controller," which suggests it's jammed with electronics, rather than a bunch of plates and oil.
What's strange is I'd expect the same unit to be in the 997 but the 997 does call for an oil change. Must be a different unit

Good news for me though


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