DCT

leederek · 06-23-2008, 04:19 PM

So I had my DCT replaced and now I'm getting a lurching motion of the car when starting up from a dead stop i.e., red light and it's only in first gear. I experienced it a few times before the 1,200 service but it seems more frequent with the new transmission. It's not a matter of adding more gas as the lurching get worse if I don't let up, what I've been doing is letting it settle for a bit as several car pass me by and stare and seems to be fine after that, no error codes.

sg///M3 · 06-23-2008, 04:49 PM

Check this thread for similar problem.
http://www.m3post.com/forums/showthread.php?t=150976

phoenixbmwlife · 06-23-2008, 04:50 PM

Gosh when will all these DCT problems end.

MDCTFTW · 06-23-2008, 05:19 PM

Quote:

Originally Posted by K3N R3D

Gosh when will all these DCT problems end.

Well he did have the entire tranny replaced. Who knows what went wrong during the install. Sucky.

phoenixbmwlife · 06-23-2008, 05:27 PM

Quote:

Originally Posted by MDCTFTW

Well he did have the entire tranny replaced. Who knows what went wrong during the install. Sucky.

True. I hope for him that they fix everything once and for all with no latency errors.

swamp2 · 06-23-2008, 06:52 PM

This is not a DCT problem.

It really is as simple as learning to drive a car with a low 1st gear and a sensitive throttle. You can get into a small feedback type of situation where you let off just a hair then the car decelerates but you (your body and leg) continue to accelerate thereby pressing the gas pedal even more, you then get in a small loop.

First try to brace your foot against the transmission tunnel on the RHS when really mashing it. This will help prevent any unwanted foot movements. Second turn the throttle mapping from Sport Plus down to Sport or from Sport down to normal.

Quote:

Originally Posted by sg///M3

Check this thread for similar problem.
http://www.m3post.com/forums/showthread.php?t=150976

Wrong referral!

sg///M3 · 06-23-2008, 07:14 PM

Quote:

Originally Posted by swamp2

Wrong referral!

Sorry, my bad. Maybe what I'm experiencing is more similar to leederek's problem than yours.

Keto · 06-23-2008, 09:36 PM

That used to happen to me all the time when I first drove SMG... watch your foot position. Too much lateral angle will make it easier for your foot to give. The software for DCT is much improved compared to SMG and doesn't get into that feedback loop nearly as much.

JEllis · 06-23-2008, 10:18 PM

In aviation we call this PIO....Pilot Induced Oscillations....

Jason

GregW / Oregon · 06-23-2008, 10:21 PM

Quote:

Originally Posted by JEllis

In aviation we call this PIO....Pilot Induced Oscillations....

Jason

Very common on the E46 M3 on Sport throttle when hitting bumps. The solution was to give more throttle, not less.

Big Windy · 06-23-2008, 10:32 PM

Quote:

Originally Posted by GregW / Oregon

Very common on the E46 M3 on Sport throttle when hitting bumps. The solution was to give more throttle, not less.

Isn't that always the solution, Greg?

RealSanaii · 06-23-2008, 10:34 PM

Happended to me few times as well. Even on D-5!!! Maybe I need to relearn how to drive..

Keto · 06-23-2008, 11:18 PM

Quote:

Originally Posted by GregW / Oregon

Very common on the E46 M3 on Sport throttle when hitting bumps. The solution was to give more throttle, not less.

Taking your foot off the gas or shifting would also work.

skierman64 · 06-23-2008, 11:36 PM

Quote:

Originally Posted by swamp2

This is not a DCT problem.

It really is as simple as learning to drive a car with a low 1st gear and a sensitive throttle. You can get into a small feedback type of situation where you let off just a hair then the car decelerates but you (your body and leg) continue to accelerate thereby pressing the gas pedal even more, you then get in a small loop.

First try to brace your foot against the transmission tunnel on the RHS when really mashing it. This will help prevent any unwanted foot movements. Second turn the throttle mapping from Sport Plus down to Sport or from Sport down to normal.

Wrong referral!

Concur, I've had this happen and it was all driver error. You need to brace your foot against the tunnel or lock your ankle to prevent movement.

Stahlgrau · 06-24-2008, 03:48 AM

This can be fun when you've got a girl with a big rack in the passenger seat. Make 'em bounce.

e46e92love · 06-24-2008, 08:56 AM

Quote:

Originally Posted by JEllis

In aviation we call this PIO....Pilot Induced Oscillations....

Jason

And Airbus will claim that is why the tail of their A300 ripped off

.......but I hear ya.

GT3 Tim · 06-24-2008, 11:17 AM

Quote:

Originally Posted by Stahlgrau

This can be fun when you've got a girl with a big rack in the passenger seat. Make 'em bounce.

LOL....great minds think alike!

06-23-2008, 04:19 PM	#1
leederek Enlisted Member 8 Rep 43 Posts Drives: 2008 E92 M3 - AW Join Date: Mar 2008 Location: Boston, MA iTrader: (0)	DCT - Lurching in 1st gear So I had my DCT replaced and now I'm getting a lurching motion of the car when starting up from a dead stop i.e., red light and it's only in first gear. I experienced it a few times before the 1,200 service but it seems more frequent with the new transmission. It's not a matter of adding more gas as the lurching get worse if I don't let up, what I've been doing is letting it settle for a bit as several car pass me by and stare and seems to be fine after that, no error codes.
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06-23-2008, 04:49 PM	#2
sg///M3 Lieutenant 6 Rep 436 Posts Drives: 2008 M3 DCT Join Date: May 2008 Location: Charlotte, NC iTrader: (0)	Check this thread for similar problem. http://www.m3post.com/forums/showthread.php?t=150976
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06-23-2008, 04:50 PM	#3
phoenixbmwlife Brigadier General 1913 Rep 4,128 Posts Drives: M235i & G30 540i Join Date: Mar 2007 Location: Boynton Beach iTrader: (0) Garage List 2014 BMW/M235i [0.00]	Gosh when will all these DCT problems end. __________________ Lack of money is not the problem. It is merely a symptom of what's going on inside of you! - T Harv Eker Follow me on Insta https://www.instagram.com/bmwm_life_/ https://www.instagram.com/autogiftua/ https://www.instagram.com/phoenixbmwlife/
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06-23-2008, 09:36 PM	#8
Keto Lieutenant Colonel 73 Rep 1,603 Posts Drives: F80 M3 Join Date: Jul 2007 Location: WHO DAT NATION iTrader: (1) Garage List 2015 BMW M3 [10.00]	That used to happen to me all the time when I first drove SMG... watch your foot position. Too much lateral angle will make it easier for your foot to give. The software for DCT is much improved compared to SMG and doesn't get into that feedback loop nearly as much. __________________ 2015 SO/SO MT M3 :: Exec : Lighting : Adaptive : HK : CF trim : Full leather : DAP : Black 19's : sunshade Crystalline tint 40%/70% on windshield : M performance mirrors, spoiler, splitters : Status Gruppe CF lip : RKP diffuser : Fully dechromed Bavsound Stage 1 : V1 Savvy hardwired : Self-coded
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06-23-2008, 10:18 PM	#9
JEllis Major General 535 Rep 5,498 Posts Drives: E36 M3, E92 M3 Join Date: Oct 2006 Location: Dallas/Ft. Worth iTrader: (4)	In aviation we call this PIO....Pilot Induced Oscillations.... Jason __________________ Instagram: jellismotorwerks
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06-23-2008, 10:34 PM	#12
RealSanaii Lieutenant 21 Rep 452 Posts Drives: 2008 Join Date: Mar 2008 Location: US iTrader: (0)	Happended to me few times as well. Even on D-5!!! Maybe I need to relearn how to drive.. __________________ I get it now... BMW FTW!
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06-24-2008, 03:48 AM	#15
Stahlgrau Second Lieutenant 2 Rep 225 Posts Drives: Backwards Join Date: Aug 2007 Location: Greenland iTrader: (0)	This can be fun when you've got a girl with a big rack in the passenger seat. Make 'em bounce.
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