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      07-19-2009, 09:37 PM   #1
zenderm3
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DCT in 335is

Hi All,

I've heard that the 335i's now have access to DCT (although the gearshift still looks like that bizzarre automatic shifter). Does this tranny fall victim to the lag issues that some of us are facing?

Not too sure of the technical considerations of this is out "M-DCT" significantly different?
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      07-19-2009, 11:02 PM   #2
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Quote:
Originally Posted by zenderm3 View Post
Hi All,

I've heard that the 335i's now have access to DCT (although the gearshift still looks like that bizzarre automatic shifter). Does this tranny fall victim to the lag issues that some of us are facing?

Not too sure of the technical considerations of this is out "M-DCT" significantly different?
Either I am totally out of the loop or this is totally wrong. 335=auto not DCT
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      07-20-2009, 12:15 AM   #3
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http://www.bimmerfile.com/2008/02/15...ies-next-year/

Also Check....

http://www.e90post.com/forums/showthread.php?p=2154951

- Answers my question about the version... but not about the lag... (still gives hope that they will keep pushing the evolution of DCT)
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      07-20-2009, 12:29 AM   #4
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Quote:
Originally Posted by zenderm3 View Post
http://www.bimmerfile.com/2008/02/15...ies-next-year/

Also Check....

http://www.e90post.com/forums/showthread.php?p=2154951

- Answers my question about the version... but not about the lag... (still gives hope that they will keep pushing the evolution of DCT)
Both of your links are a year and half old. They were rumors and speculation then and now they are debunked water under the bridge, because the 3 series is a regular AUTO not DCT.
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      07-20-2009, 01:59 AM   #5
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I believe EU 335i has an option for DCT, Right?
I saw threads in E90Post. 335i DCT has the same the knob as 5er sport A/T (or we can call it X5M) knob, not US A/T knob.
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      07-20-2009, 02:07 AM   #6
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Quote:
Originally Posted by ///Metak View Post
Both of your links are a year and half old. They were rumors and speculation then and now they are debunked water under the bridge, because the 3 series is a regular AUTO not DCT.
Metak - yup realise the links are old - but my dealer confirmed that Australia is getting a 335i with DCT.

http://www.e90post.com/forums/showthread.php?t=191251

This was from December '08. Interesting...
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      07-20-2009, 02:30 AM   #7
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Quote:
Originally Posted by isugoo View Post
I believe EU 335i has an option for DCT, Right?
I saw threads in E90Post. 335i DCT has the same the knob as 5er sport A/T (or we can call it X5M) knob, not US A/T knob.
Ok, so I really don't keep up on E9x(nonM) specs around the world but I found this on BMW UK. OP I am guessing that this is not the same DCT that is found in the M3's. Much like the E46 had a slower dumbed down version of SMG's in nonM's.

http://ecom.bmwgroup.com:80/bvco/con...789&code=S02TC
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      07-20-2009, 02:55 AM   #8
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Thanks Metak for the link. I guess I'm happy that BMW are investing in this technology which should mean continuing improvements to M-DCT
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      07-20-2009, 03:16 AM   #9
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Quote:
Originally Posted by ///Metak View Post
Ok, so I really don't keep up on E9x(nonM) specs around the world but I found this on BMW UK. OP I am guessing that this is not the same DCT that is found in the M3's. Much like the E46 had a slower dumbed down version of SMG's in nonM's.

http://ecom.bmwgroup.com:80/bvco/con...789&code=S02TC
Yes- I heard that it's not an hardcore M-level DCT but still DCT so should be better than the A/T (def. looks better for sure).
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      07-20-2009, 03:28 AM   #10
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Isugoo - do you have DCT or MT?
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      07-20-2009, 07:20 AM   #11
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I would be surprised if the DCT hardware used in the 335 and in the new Z4 substantially differs from that fitted in the M3. The software yes it is different, I understand it is more simpified (not too many options / seetings to select etc), but for the hardware setup I don't think so. It does not make much of an economic sense (and numbers count these days more than before). I don't know, I may be talking nonsense.
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      07-20-2009, 07:24 AM   #12
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gr8000 - good point. I would agree the mechanics would be the same - although you would have thought that perhaps the materials used may differ?
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      07-20-2009, 07:31 AM   #13
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Maybe save a bit on production / material costs via a downscaled version as it needs to handle less torque and horsepower? In other words smaller clutch discs, smaller oil pump / cooler, smaller clutch actuators etc?

I really don't know, its all guesswork.
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      07-20-2009, 08:39 AM   #14
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Quote:
Originally Posted by gr8000 View Post
I would be surprised if the DCT hardware used in the 335 and in the new Z4 substantially differs from that fitted in the M3. The software yes it is different, I understand it is more simpified (not too many options / seetings to select etc), but for the hardware setup I don't think so. It does not make much of an economic sense (and numbers count these days more than before). I don't know, I may be talking nonsense.
That's right, these transmissions are identical as far as hardware is concerned.


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      07-20-2009, 10:50 AM   #15
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So southy does that mean that the DCT is really all in the software (Drivelogic?)?
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      07-20-2009, 11:06 AM   #16
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The 335i and the new Z4 have the new DCT but not the same with M3 DCT. Maybe a difference in S/W or H/W but that is beyond my pay grade. The shifter is not the same as the M-DCT shifter. It looks like the old AT shifter.
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      07-20-2009, 11:47 AM   #17
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Quote:
Originally Posted by zenderm3 View Post
So southy does that mean that the DCT is really all in the software (Drivelogic?)?
Yes, it's all in the software. Southy?

Quote:
Originally Posted by valeram View Post
The 335i and the new Z4 have the new DCT but not the same with M3 DCT. Maybe a difference in S/W or H/W but that is beyond my pay grade. The shifter is not the same as the M-DCT shifter. It looks like the old AT shifter.
When I said the hardware is the same, I didn't think of the shifter and the paddles. You're right, shifter and paddles are different.


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      07-20-2009, 12:44 PM   #18
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Quote:
Originally Posted by zenderm3 View Post
Isugoo - do you have DCT or MT?
I have 6 speed E90M3 now.
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      07-20-2009, 01:32 PM   #19
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Yes, the 335i DCT does lag, according to a couple people who responded in my thread here:

http://www.e90post.com/forums/showthread.php?p=4874740

Supposedly, however, the Z4 35i DCT does not lag. I can't remember where I heard that though, so I don't know how sure we are of that. All three cars share the same transmission.
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      07-20-2009, 01:43 PM   #20
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Quote:
Originally Posted by isugoo View Post
Yes- I heard that it's not an hardcore M-level DCT but still DCT so should be better than the A/T (def. looks better for sure).
The AT in the 335i is actually pretty damn good!
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      07-20-2009, 07:22 PM   #21
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Quote:
Originally Posted by southlight View Post
Yes, it's all in the software. Southy?

Best regards,
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Sorry South (it is an Australian vernacular to put an 'o' or 'y' at the end of a name). No disrespect. Thanks for the info.

Interesting how Z4 isn't getting lag.. Might be a good sign for the M3...
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      07-20-2009, 09:02 PM   #22
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Quote:
Originally Posted by gr8000 View Post
I would be surprised if the DCT hardware used in the 335 and in the new Z4 substantially differs from that fitted in the M3. The software yes it is different, I understand it is more simpified (not too many options / seetings to select etc), but for the hardware setup I don't think so. It does not make much of an economic sense (and numbers count these days more than before). I don't know, I may be talking nonsense.
Roundel magazine has an article that confirms main difference between M3 DCT vs Z4 DCT is software programming..but mechanically the same tranny.....also price of Z4 DCT is almost half that of M DCT...BMW says due to "programming"......Great I pay twice as much and get the "programmed" lag as a freebie
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