Quote:
Originally Posted by Surname
Clutch delay valve, delays engagement to facilitate smoother shifts, or, so I'm told.
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Actually it makes for rougher shifts. It makes it almost impossible to shift from first to second smoothly. BMW engineered it to add more wear to the clutch than the diff under hard shifts. They do this so there is less, or ideally no damage to the diff. BMW started adding this piece before the offered maint on thier cars, and currently dont offer it in other parts of the world. So it is there to add clutch wear instead of diff wear, because clutches are cheaper, and not covered all over the world.