DCT

e.n335 · 06-12-2010, 07:18 AM

Hi,

Since I have the car I feel slightly jerky clutch behavior while maneuvering or by soft acceleration from a dead stop. Is this normal with the M3 DCT in D(2) mode ?

Thanks,
Eugen

H Bomb · 06-12-2010, 08:52 AM

i think there is a software upgrade for it. i know the Dinan Software smooths it out in addition to the increase in rev limiter and little power bump

i even had this in my 6sp man and when i added the Dinan Software it was gone, car ran much better off the bottom much smoother from take off

r53s65e90 · 06-12-2010, 02:23 PM

I believe it is normal. During slow maneuvering DCT is jerky. Noticeably jerkier than an automatic. This is probably the reason it will be applied only to M cars and other distinctively sportier BMWs (135i, 335is, Z4). The rest will get the 8 speed AT which is much much smoother based on my test drive of a F10 550i. Software can probably smooth out the clutch operation at slow speeds but I don't think there is anything you can do to make it 100% AT smooth.

GT3 Tim · 06-14-2010, 12:10 PM

Mine is a bit jerky too during low speed (on/off throttle). Normal I guess.

Andrew 912 · 06-14-2010, 06:47 PM

It's normal in DCT, I believe ECU remapping would make the power more linear and smoothing the transmission.

06-12-2010, 07:18 AM	#1
e.n335 Moderator 270 Rep 4,481 Posts Drives: e93 ///M3 DCT, 07/2009 Join Date: Feb 2007 Location: Switzerland, ZH iTrader: (0)	DCT - slightly jerky clutches ? Hi, Since I have the car I feel slightly jerky clutch behavior while maneuvering or by soft acceleration from a dead stop. Is this normal with the M3 DCT in D(2) mode ? Thanks, Eugen
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06-12-2010, 08:52 AM	#2
H Bomb Lieutenant Colonel 65 Rep 1,676 Posts Drives: 08 M3 Join Date: Jul 2007 Location: FL to NY iTrader: (4)	i think there is a software upgrade for it. i know the Dinan Software smooths it out in addition to the increase in rev limiter and little power bump i even had this in my 6sp man and when i added the Dinan Software it was gone, car ran much better off the bottom much smoother from take off __________________ Street- 08 E92 M3- Sparkling Graphite/ Fox Red/6sp Track- 10 CRF 250-PR2 Race Motor/Ohlins TTX Susp Hauler- 06 Ford Skyjacker F250 4WD
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06-12-2010, 02:23 PM	#3
r53s65e90 8300 19 Rep 573 Posts Drives: r53 s65e90 Join Date: Mar 2009 Location: San Jose, CA iTrader: (0)	I believe it is normal. During slow maneuvering DCT is jerky. Noticeably jerkier than an automatic. This is probably the reason it will be applied only to M cars and other distinctively sportier BMWs (135i, 335is, Z4). The rest will get the 8 speed AT which is much much smoother based on my test drive of a F10 550i. Software can probably smooth out the clutch operation at slow speeds but I don't think there is anything you can do to make it 100% AT smooth.
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06-14-2010, 12:10 PM	#4
GT3 Tim Moderator 94 Rep 1,920 Posts Drives: 2014 MB E63S Join Date: Feb 2008 Location: Sacramento, CA iTrader: (0)	Mine is a bit jerky too during low speed (on/off throttle). Normal I guess. __________________ Tim <--- apparently likes "3" cars 2014 E63S -- The Rocket 2014 F30 328i -- Kids car 2008 E90 M3 -- Sold 2004 GT3 -- Sold 1997 M3/4 -- Sold 1995 M3 -- Sold
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06-14-2010, 06:47 PM	#5
Andrew 912 //M addicted 6 Rep 128 Posts Drives: AW M3 E92 - MR X6M Join Date: Jul 2009 Location: Massachussetts iTrader: (0)	It's normal in DCT, I believe ECU remapping would make the power more linear and smoothing the transmission.
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