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      04-05-2012, 06:18 PM   #8
Gearhead999s
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Drives: E93 335is(wifes)F82 M4
Join Date: Apr 2007
Location: Toronto

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Quote:
Originally Posted by jvitas View Post
I agree with Persian54. No need to use S6 unless you want to destroy the DCT sooner. S4 is fast enough and doesn't upset the car.

There is a trade off between fast shifts and slow shifts. Fast shifts are harder on the gears. Slow shifts are harder on the clutches. Gears break. Clutches wear out. In this case the DCT clutches are pretty robust. Probably will never wear out. Gears on the other hand, and the syncros, usually just break.

Learned that the hard way on my E46 M3 with SMG II.
SMG's which used a "normal" dry clutch and M-DCT 'dual clutch" are night and day different in the way they operate.A SMG shifts like a normal manual gearbox where a DCT uses 2 input shafts with the gears preloaded before the clutch drives the next gear selected.Quite different for sure.So far issues that happened with SMG have not surfaced in the M-DCT.
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