DCT jerking?

soniczoom5 · 12-11-2012, 11:12 AM

Hey guys,

Anyone had this issue on their DCT? I have a new 2011 E90/DCT; when I'm stopped at a light in automatic mode, the car sometimes jerks slightly; I feel like its the transmission changing gears and it feels like it wants to move forward; it doesn't actually move at all since I have the brake down; anyone else experience this at all? (tranny is in D2 at the time)

Thanks

FVM3 · 12-11-2012, 12:12 PM

get it updated in the dealer

outie · 12-11-2012, 12:47 PM

Normal. It surges a little bit when you are coming to a stop.

av2 · 12-11-2012, 01:15 PM

When you're in stop and go traffic, the car is switching between 1st gear and neutral. To prevent the car from stalling, the clutch is lifted from 1st when you apply the brake to stop. It does jerk slightly. Deep down, the DCT is still manual transmission.

Transfer · 12-11-2012, 03:43 PM

Normal, do nothing about it. DCT is clunky at times.

1MOREMOD · 12-11-2012, 03:50 PM

easier to jerk it in a dct for sure.

1911 · 12-11-2012, 03:55 PM

Quote:

Originally Posted by chriszeh

easier to jerk it in a dct for sure.

+1 hahaha

sensi09 · 12-11-2012, 04:52 PM

When coming to a stop, there is usually a jerk when the car shifts down into 2nd on its own. Do other people experience this?

C|3R1C · 12-11-2012, 05:03 PM

Quote:

Originally Posted by sensi09

When coming to a stop, there is usually a jerk when the car shifts down into 2nd on its own. Do other people experience this?

All the time. I realized if I feather the brake nicely it won't jerk and come to a smooth stop. But slowing down, turning, then reaccelerating jerks like crazy. DCT likes to think a little too much.

sensi09 · 12-11-2012, 05:05 PM

I think it happens a little less in D mode. Shifting down to 2nd on your own can help too.

But whenever it does jerk into 2nd, it's usually unexpected.

TOSKABG · 12-11-2012, 05:07 PM

Normal...and you drive in D2...

URBAN LEGEND · 12-11-2012, 05:35 PM

Quote:

Originally Posted by TOSKABG

Normal...and you drive in D2...

Interesting setting for sure.

GIdriver · 12-11-2012, 06:09 PM

Quote:

Originally Posted by chriszeh

easier to jerk it in a dct for sure.

LMFAO!!!

OP must admit that the thread title is kinda funny...

kwike92 · 12-11-2012, 07:07 PM

I'm experiencing this right now and my SA told me it was normal?said there was no updates available.

Mines a 2009e92

1MOREMOD · 12-11-2012, 07:10 PM

Quote:

Originally Posted by GIdriver

LMFAO!!!

OP must admit that the thread title is kinda funny...

yep. alas i have a 6mt. so need a female copilot to do the heavy lifting.

lopeolinda · 12-11-2012, 07:39 PM

It surges a little bit when you are coming to a stop.

Pontrelli · 12-11-2012, 08:20 PM

Quote:

Originally Posted by chriszeh

easier to jerk it in a dct for sure.

URBAN LEGEND · 12-11-2012, 09:00 PM

I had an M3 which did what the OP posted. Now my M5 does the same. Are these bad boys using the same identical tranny?

fuddman · 12-11-2012, 10:08 PM

Quote:

Originally Posted by sensi09

When coming to a stop, there is usually a jerk when the car shifts down into 2nd on its own. Do other people experience this?

No.
As you know, if you're driving in the D modes, you can select 5 levels of shifting, each level selected on the console rocker switch. You might want to try various levels of shifting via that rocker switch and see if they have an affect on your symptoms. In level one D mode(the first vertical bar showing), for example, when the car comes to a stop, the transmission stops and remains in second gear not first gear. Does that level affect the jerking you encounter?

sensi09 · 12-12-2012, 01:12 AM

Quote:

Originally Posted by fuddman

No.
As you know, if you're driving in the D modes, you can select 5 levels of shifting, each level selected on the console rocker switch. You might want to try various levels of shifting via that rocker switch and see if they have an affect on your symptoms. In level one D mode(the first vertical bar showing), for example, when the car comes to a stop, the transmission stops and remains in second gear not first gear. Does that level affect the jerking you encounter?

Don't use D mode much but would be in either D3 or D4.

Not interested in using any lower modes, but the jerk I'm referring to is when the car shifts down into 2nd on its own when rolling to a stop. Not when accelerating from a stop.

fuddman · 12-12-2012, 10:03 AM

Quote:

Originally Posted by sensi09

the jerk I'm referring to is when the car shifts down into 2nd on its own when rolling to a stop.

When I'm in D mode, foot off the gas, no brakes applied, and allowing the car to come to a rolling stop, then, yes, I feel the car downshift through all the gears from 7th to 2nd. But all the downshifts are barely noticeable.
It sounds as if you have a problem that needs dealer attention.
In my previous post, I wasn't suggesting you find another transmission mode and just keep driving. Rather (and I probably didn't do a good job of it), just test the cars response to the various transmission modes that are available to you. In that way, you may find the problem is only occurring in one or two modes rather than across all transmission settings. A little test like this could help the SA address the problem.

dondula · 12-12-2012, 12:16 PM

Quote:

Originally Posted by chriszeh

easier to jerk it in a dct for sure.

Hahahaha! This just made my day lolol

12-11-2012, 11:12 AM	#1
soniczoom5 S65 FTW!!! 59 Rep 285 Posts Drives: 2011 E90 BMW M3 Silverstone Join Date: Feb 2012 Location: USA iTrader: (0) Garage List 2014 Mercedes [0.00] 2020 X5 M50i [0.00]	DCT jerking? Hey guys, Anyone had this issue on their DCT? I have a new 2011 E90/DCT; when I'm stopped at a light in automatic mode, the car sometimes jerks slightly; I feel like its the transmission changing gears and it feels like it wants to move forward; it doesn't actually move at all since I have the brake down; anyone else experience this at all? (tranny is in D2 at the time) Thanks
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12-11-2012, 12:12 PM	#2
FVM3 Major General 270 Rep 5,751 Posts Drives: e92 m3, f30 328i Join Date: Sep 2010 Location: Los Angeles iTrader: (2)	get it updated in the dealer
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12-11-2012, 12:47 PM	#3
outie Lieutenant 92 Rep 566 Posts Drives: 2022 Porsche Taycan GTS Join Date: Feb 2009 Location: CA iTrader: (0) Garage List 2022 Tesla Model X [0.00] 2023 McLaren 720S S ... [0.00] 2022 Porsche Taycan ... [0.00]	Normal. It surges a little bit when you are coming to a stop. __________________
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12-11-2012, 01:15 PM	#4
av2 Private 0 Rep 59 Posts Drives: e92 M3 DCT Join Date: Apr 2008 Location: S.CAL iTrader: (0)	When you're in stop and go traffic, the car is switching between 1st gear and neutral. To prevent the car from stalling, the clutch is lifted from 1st when you apply the brake to stop. It does jerk slightly. Deep down, the DCT is still manual transmission. __________________ Current: E92 M3 DCT, Cayenne Turbo S, Ferrari F430 F1 Past:911 Turbo (996), C32 AMG, S2000, (E36) M3, Supra TT, MR2 Turbo
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12-11-2012, 03:43 PM	#5
Transfer Major General 5248 Rep 5,874 Posts Drives: Bronco Wildtrak, Tesla MYP Join Date: Mar 2010 Location: Issaquah, WA iTrader: (1)	Normal, do nothing about it. DCT is clunky at times.
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12-11-2012, 03:50 PM	#6
1MOREMOD - 11817 Rep 23,187 Posts Drives: Race car-> Join Date: Mar 2009 Location: check your mirrors iTrader: (5)	easier to jerk it in a dct for sure. __________________ 02 Tiag e46 M3\|6MT\|GC plates\|MCS c.o.\|GC bars\|GC race control arms\|GC bushings\|BW eng. & tran. mounts\|subframe kit\|BW race shifter\|BW Jaffster\|Euro header\|BW exhaust\|K&N c.a.i.\|Epic race tune\|Rouge pulleys\|Seibon CF hood\|CSL bumper\|apr gt 250 & splitter\|ST-40\|XR-2\|SS lines\|half cage\|Recaro profi\|Profi 2 harness\|BMWpedals\|BW studs\|
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12-11-2012, 04:52 PM	#8
sensi09 Lieutenant Colonel 30 Rep 1,789 Posts Drives: . Join Date: Dec 2010 Location: socal iTrader: (1)	When coming to a stop, there is usually a jerk when the car shifts down into 2nd on its own. Do other people experience this?
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12-11-2012, 05:05 PM	#10
sensi09 Lieutenant Colonel 30 Rep 1,789 Posts Drives: . Join Date: Dec 2010 Location: socal iTrader: (1)	I think it happens a little less in D mode. Shifting down to 2nd on your own can help too. But whenever it does jerk into 2nd, it's usually unexpected.
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12-11-2012, 05:07 PM	#11
TOSKABG vekize 0 Rep 74 Posts Drives: 2011 BMW E92/ZCP/DCT/ Join Date: May 2012 Location: Belvidere,IL iTrader: (0)	Normal...and you drive in D2...
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12-11-2012, 07:07 PM	#14
kwike92 Lieutenant Colonel 121 Rep 1,775 Posts Drives: 2014 M5 CP Join Date: Feb 2010 Location: Costa Mesa, Ca iTrader: (9)	I'm experiencing this right now and my SA told me it was normal?said there was no updates available. Mines a 2009e92 __________________ 2014 M5 Comp Package.
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12-11-2012, 07:39 PM	#16
lopeolinda New Member 0 Rep 8 Posts Drives: bmw Join Date: Dec 2012 Location: 2010 iTrader: (0)	It surges a little bit when you are coming to a stop. __________________
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12-11-2012, 09:00 PM	#18
URBAN LEGEND Rocky 412 Rep 3,085 Posts Drives: 16 M5, 18 ZL1 1LE, 18 M3 Join Date: Feb 2009 Location: Brenham TX iTrader: (0)	I had an M3 which did what the OP posted. Now my M5 does the same. Are these bad boys using the same identical tranny? __________________ 22 Audi RS E-Tron GT 21 Model S Plaid
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