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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 11-14-2013, 07:10 AM
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rdkind62 rdkind62 is online now
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question for those familiar with the 7 speed DCT

I recently purchased my 2011 335is and it has the 7 speed DCT that I have never driven before. When I take off slowly (like pulling out of the garage at low speed) it seems as though the transmission kind of slides into gear kind of like a manual transmission that has a clutch going out. As I gain speed the shifts between other gears are very gentle and hardly noticeable which I believe is the way it should be. It just that initial take off that has me a bit worried. Do I have a problem or do I need to get used to the way it performs?
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  #2  
Old 11-14-2013, 07:27 AM
hondo402000 hondo402000 is offline
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my 335 has a 6 speed transmission, one thing I figured out is it starts off in second gear unless I put it in DS mode and shift to first

not sure if this is relevant or not
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Old 11-14-2013, 07:50 AM
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Mine is definitely starting out in 1st gear because it is constantly displayed near the time and outdoor temperature on the dash.
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Old 11-14-2013, 09:21 AM
RobertoCervezas RobertoCervezas is offline
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Quote:
Originally Posted by rdkind62 View Post
Mine is definitely starting out in 1st gear because it is constantly displayed near the time and outdoor temperature on the dash.
What you're feeling is the clutch engaging. Just like with a manual transmission, clutch slippage is required to get the car moving in 1st gear. In your case, the car is doing this on its own. Definitely takes some getting used to if you normally drive automatic transmission, but should feel very familiar if you usually drive a manual trans.
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Old 11-14-2013, 09:28 AM
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Start in first unless its a max acceleration run then use either launch control or 2nd gear. I prefer 2nd gear. The DCT has a pair of wet clutches & its them engaging that you are feeling on start. In D normal mode its quite smooth going up. When I first got it I was looking down a lot to see if it had actually shifted. In M sport button you will have no doubt that a shift has occurred
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Old 11-14-2013, 09:58 AM
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Quote:
Originally Posted by RobertoCervezas View Post
What you're feeling is the clutch engaging. Just like with a manual transmission, clutch slippage is required to get the car moving in 1st gear. In your case, the car is doing this on its own. Definitely takes some getting used to if you normally drive automatic transmission, but should feel very familiar if you usually drive a manual trans.
I hope this is the case and it is taking a bit of getting used to. I am coming out of Z4 that had a MT so I do recognize the feel, but just not what I expected from a so called AT.
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Old 11-14-2013, 11:24 AM
RobertoCervezas RobertoCervezas is offline
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Quote:
Originally Posted by rdkind62 View Post
I hope this is the case and it is taking a bit of getting used to. I am coming out of Z4 that had a MT so I do recognize the feel, but just not what I expected from a so called AT.
Just remember that your transmission is not an automatic. It's a manual that has a computer operating the clutches and shifter for you. I drive manual myself, but enjoy driving the DCT when I have the chance
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Old 11-14-2013, 11:39 AM
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What you really have is an automated manual 7 speed transmission not a normal 8 speed Torque Converter & Planetary gear set auto. You can see the duel clutches hanging off the extreme right in the picture. In the SMG picture you can see the fat torque converted in the bell housing. If you look carefully you can also see the difference in the transmissions gear sets.
DTC


SMG
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Last edited by bear-avhistory; 11-14-2013 at 11:45 AM.
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  #9  
Old 11-14-2013, 01:06 PM
anE934fun anE934fun is offline
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Originally Posted by RobertoCervezas View Post
Just remember that your transmission is not an automatic. It's a manual that has a computer operating the clutches and shifter for you. I drive manual myself, but enjoy driving the DCT when I have the chance
+1. The DCT is a completely different experience. It is not a traditional automatic on manual shift setting. The DCT is head-and-shoulders better than the previous edition SMG that the E46 M3 was equipped with.
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Old 11-14-2013, 03:50 PM
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+1. The DCT is a completely different experience. It is not a traditional automatic on manual shift setting. The DCT is head-and-shoulders better than the previous edition SMG that the E46 M3 was equipped with.
I have heard nothing but good things about this transmission and have also heard that the SMG was pretty clunky. I will just have to spend more time with this one to get accustomed to its behavior.
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