I will look for it. But in the meantime, recall that we are talking about the clutch engagement time and input/output slip ratios as inputs to a modulated clutch pressure application, for a wet clutch pack. You don't think that the boundary and hydrodynamic friction characteristics are the variables we are adapting to? We are adjusting pressure, not travel position. And if we agree that we are adapting to the friction of clutch plates as they wear, isn't that friction a function of both the clutch plate surface properties and the fluid?

There is another document posted up here somewhere that talks about the x drive transfer case. That has adaptations as well. And the control strategy is exactly the same, clutch pressure is modulated based on feedback signals. In that component, when the adaptations reach their limit (no more ability to correct for fluid properties as they change from time to time) you get a light on the dash saying fluid is out of spec. Not that clutch plates are worn, but that fluid is out of spec. Exactly the same principle.

Edit: Quoted ZF transmission document: http://www.e38.org/electran1.pdf. Still looking for the original one.

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