On the clutch housing, the soaked clutch fluid is not really lubricant, it is actually correct reverse for anti slip goal. I do not have information when there is cooler on this aspect. Now, as you recognize clutch slipping is negative, That is also why not employing dedicated DCT fluids https://x50-gearbox99987.blogpayz.com/33858796/the-smart-trick-of-x50-gearbox-that-no-one-is-discussing