New DCT Problem (sudden upshift) - M3 Forum 2010 2009 BMW M3 2008 BMW M3 BMW E90 M3 E92

M3Rad · 09-23-2008, 05:11 AM

This happened this weekend at an autocross. I wonder if this has happened to anyone else.

During a transition from a left turn to a right hairpin during braking, the car will upshift from 2nd gear to 6th or 7th gear on his own. It did this at every run (total of 12 runs), with the exception of the runs where I drove a slower pace through the same section to avoid the problem.

DCT was off, the problem happened with S3/S4 and S6 modes. I did not try the D (Automatic) modes. ECU in comfort, suspension in sport.

By the way, the car did not downshift from 3rd to 2nd gear at the two turns that I needed to downshift. It did it in the middle of the turn, throwing away my balance.

GT3 Tim · 09-26-2008, 10:58 PM

Quote:

Originally Posted by M3Rad

This happened this weekend at an autocross. I wonder if this has happened to anyone else.

During a transition from a left turn to a right hairpin during braking, the car will upshift from 2nd gear to 6th or 7th gear on his own. It did this at every run (total of 12 runs), with the exception of the runs where I drove a slower pace through the same section to avoid the problem.

DCT was off, the problem happened with S3/S4 and S6 modes. I did not try the D (Automatic) modes. ECU in comfort, suspension in sport.

By the way, the car did not downshift from 3rd to 2nd gear at the two turns that I needed to downshift. It did it in the middle of the turn, throwing away my balance.

I have experienced mine skipping 2nd. On full accel, when attempting to paddle shift from 1 to 2, it would straight up skip 2nd. I was able to repeat it several times and was SURE that I did not double click the paddle.

My car has only skipped 2nd, and went into 3rd. Yours going all the way to 6th is the first I have heard of.

sfbimmer13 · 09-26-2008, 11:18 PM

yes happened to me a couple of times at Laguna Seca, Infineon and Thunderhill - wanted 2nd got 7th mid turn...

Radiation Joe · 09-26-2008, 11:18 PM

I believe Enigma said it happened to him at the Marina auto-x.

sayemthree · 09-27-2008, 02:55 AM

DCT= FTL!

(flame suit on)

M-Maika · 09-27-2008, 05:02 AM

Quote:

Originally Posted by sayemthree

DCT= FTL!

(flame suit on)

I haven´t experienced any up or downshifts in the S mode except when you are slowing the car to a stop or the gear is to high for the speed and it downshits. That pretty much it.

You asked for it.

Best Regards, Maika

icemang17 · 09-27-2008, 12:34 PM

Quote:

Originally Posted by sfbimmer13

yes happened to me a couple of times at Laguna Seca, Infineon and Thunderhill - wanted 2nd got 7th mid turn...

Me too.....turn 11 at thunderhill...wanted 2nd and got 6th

Big Windy · 09-27-2008, 12:37 PM

wow, that is a very interesting issue. the DCT refusing to downshift prior to a turn is not a new one, but i haven't heard of this before...hopefully it can be resolved, because that sounds very wrong.

sfbimmer13 · 09-27-2008, 01:22 PM

Quote:

Originally Posted by icemang17

Me too.....turn 11 at thunderhill...wanted 2nd and got 6th

I had another weird thing going on at turn 14 at Thunderhill - car stayed in 4th gear and wouldn't accept any throttle input I had to shift into N and than back into gear to get it going again - once I post the videos you can clearly see it

GT3 Tim · 09-30-2008, 12:33 PM

Quote:

Originally Posted by sfbimmer13

I had another weird thing going on at turn 14 at Thunderhill - car stayed in 4th gear and wouldn't accept any throttle input I had to shift into N and than back into gear to get it going again - once I post the videos you can clearly see it

haha. Yeah, I have had that problem too! lol. Car basically does not respond to any throttle input, period. I found if I feathered the throttle, it would eventually respond.

My car is still at the shop with 4 or 5 (forgot how many) issues related to drivability. Stalling, ignored shift commands, skipping gears, no response from throttle input, etc.. I believe I have experienced all but ignored downshift commands under heavy braking (prolly because I have not tracked the car yet).

They have started a PuMA case and I sit and wait for a fix. It appears that they are relying on the "update" to fix these issues. I have my doubts that all of these things will be addressed by the update as I heard there is yet another in the works already. But I have my fingers crossed that it gets resolved. I bought the car to drive and enjoy, not sit at the dealer. If this does not get resolved in 30 calendar days, as required by California Lemon Law, I will probably give up and order an '09 and hope that one is "correct" when it arrives.

On a side note, the California Lemon Law was updated a few years ago to add a clause that if it is a "serious safety issue", the car can be lemoned after two failed repair attempts. This is the second visit to the dealer to resolve these issues. I consider it a serious safety issue when I have my daughter in the car, pull out to cross the street, and the car stalls! This has happened a few times! I ended up parking the car until the dealer was able to provide a loaner vehicle! Not safe to drive, period.

If it does not get fixed, I am not sure what I will do...the only other requirment of ME is to send a letter to the "manufacturer" to advise them of these issues. I am drafting a letter today just to comply with the Lemon Law criteria, just in case it comes to that. But I would rather just have it fixed correctly and be back in my car!

I will keep the forum updated with progress, info, etc. as it becomes available....

lucid · 09-30-2008, 02:20 PM

Quote:

Originally Posted by GT3 Tim

My car is still at the shop with 4 or 5 (forgot how many) issues related to drivability. Stalling, ignored shift commands, skipping gears, no response from throttle input, etc.. I believe I have experienced all but ignored downshift commands under heavy braking (prolly because I have not tracked the car yet).

Ouch! That's a lot of issues to be having with a brand new car. Sorry man...

enigma · 09-30-2008, 03:38 PM

Quote:

Originally Posted by M3Rad

This happened this weekend at an autocross. I wonder if this has happened to anyone else.

I even have it on video over in my autocross thread.

The indication I got was BMW expects the SW update to address this. I had the car in twice.

1st time they replaced a bunch of sensors and generally seemed to be guessing.

2nd trip, they downloaded the data and then told me BMW expects the SW update to fix the issue.

enigma · 09-30-2008, 03:43 PM

Quote:

Originally Posted by sayemthree

DCT= FTL!

(flame suit on)

You make it really hard to respect you. If you don't like DCT cars, why can you not simply ignore the threads?

GT3 Tim · 10-01-2008, 10:54 AM

Quote:

Originally Posted by enigma

I even have it on video over in my autocross thread.

The indication I got was BMW expects the SW update to address this. I had the car in twice.

1st time they replaced a bunch of sensors and generally seemed to be guessing.

2nd trip, they downloaded the data and then told me BMW expects the SW update to fix the issue.

That is my planned next step....to run video while driving around. I want to be able to prove the issues I am experiencing, just in case. I wish I did not sell my mount a few years back. Looks like I need to buy another.

GT3 Tim · 10-01-2008, 10:57 AM

Quote:

Originally Posted by lucid

Ouch! That's a lot of issues to be having with a brand new car. Sorry man...

Yeah, seems like I have nearly all of the issues.

Good news is that being as I do, my car may be THE car for them to monkey with to figure it out! lol

I still have faith they will get it sorted.

If not, I will just have to Lemon it and get an '09 and hope it is sorted by then. I aint stressing too hard off of it. Guess I am pretty easy-going!

I have faith they will handle it one way or the other, so its just a matter of time at this point.

ace996 · 10-08-2008, 07:14 PM

Quote:

Originally Posted by enigma

You make it really hard to respect you. If you don't like DCT cars, why can you not simply ignore the threads?

Yes, he should just ignore these threads and your signature...

______________________________
DCT, the VistaOS of transmissions- update/patch to be released 'soon'...

aussiem3 · 10-09-2008, 09:55 AM

There is a campaign out to upgrade the DCT software. Any cars going in for running in service are upgraded. During this upgrade it rewrites something like 10 difference computers and takes anything between 4-6 hours.

The DCT software has been out only for a week or so. So if you have a DCT car go and get it fixed.

GT3 Tim · 10-09-2008, 10:59 AM

Quote:

Originally Posted by aussiem3

There is a campaign out to upgrade the DCT software. Any cars going in for running in service are upgraded. During this upgrade it rewrites something like 10 difference computers and takes anything between 4-6 hours.

The DCT software has been out only for a week or so. So if you have a DCT car go and get it fixed.

Please post any specific details you have on the upgrade!

E. Honda · 10-09-2008, 11:38 AM

6MT ftmfw.

tr00f.

SpacecakeM · 10-09-2008, 02:03 PM

Quote:

Originally Posted by E. Honda

6MT ftmfw.

tr00f.

350 z FTL

sfbimmer13 · 10-09-2008, 02:46 PM

Quote:

Originally Posted by E. Honda

6MT ftmfw.

tr00f.

please more useful answers like this:finger:

sayemthree · 10-09-2008, 03:58 PM

not a new problem - repost.

09-23-2008, 05:11 AM	#1
M3Rad New Member Drives: 2008 BMW M3 DCT Join Date: Aug 2008 Location: Los Angeles, CA Posts: 29 iTrader: (0)	New DCT Problem (sudden upshift) This happened this weekend at an autocross. I wonder if this has happened to anyone else. During a transition from a left turn to a right hairpin during braking, the car will upshift from 2nd gear to 6th or 7th gear on his own. It did this at every run (total of 12 runs), with the exception of the runs where I drove a slower pace through the same section to avoid the problem. DCT was off, the problem happened with S3/S4 and S6 modes. I did not try the D (Automatic) modes. ECU in comfort, suspension in sport. By the way, the car did not downshift from 3rd to 2nd gear at the two turns that I needed to downshift. It did it in the middle of the turn, throwing away my balance. __________________ 03 Celica GTS 04 Hummer H2 07 Cayman S 08 BMW M3 09 Scuderia

09-26-2008, 11:18 PM	#3
sfbimmer13 Original Bavarian Heritage Drives: 2008 E92 M3 DCT Join Date: Jun 2008 Location: San Francisco Posts: 311 iTrader: (0)	yes happened to me a couple of times at Laguna Seca, Infineon and Thunderhill - wanted 2nd got 7th mid turn... __________________ -------------------------------------------------------------------------------------------------------------- 2008 E92 M3 M-DCT - Sparkling Graphite - Fox Red - Tech Package - Premium Package - Moonroof - Enhanced Premium Sound - HD Radio - iPod USB interface - PDC - Remus Race Exhaust

10-09-2008, 09:55 AM	#17
aussiem3 Private First Class Drives: E92 M3 Join Date: Jul 2007 Location: Down Under Posts: 185 iTrader: (0)	There is a campaign out to upgrade the DCT software. Any cars going in for running in service are upgraded. During this upgrade it rewrites something like 10 difference computers and takes anything between 4-6 hours. The DCT software has been out only for a week or so. So if you have a DCT car go and get it fixed. __________________ E92 M3 2007 - SSII with extended Black

09-26-2008, 11:18 PM	#4
Radiation Joe Veni Vidi Vici Drives: AW/BB-DCT-e90 Join Date: Jul 2008 Location: Lakeport CA, Macungie PA Posts: 1,483 iTrader: (0) View Radiation Joe's Garage	I believe Enigma said it happened to him at the Marina auto-x.

09-27-2008, 02:55 AM	#5
sayemthree Brigadier General Drives: ObamieTheKommie Join Date: Aug 2007 Location: ObamaKommieLand Posts: 4,852 iTrader: (0)	DCT= FTL! (flame suit on)

09-27-2008, 12:37 PM	#8
Big Windy Major General Drives: nothing at the moment Join Date: Mar 2007 Location: seatac, wa Posts: 5,171 iTrader: (0) View Big Windy's Garage	wow, that is a very interesting issue. the DCT refusing to downshift prior to a turn is not a new one, but i haven't heard of this before...hopefully it can be resolved, because that sounds very wrong.

10-09-2008, 11:38 AM	#19
E. Honda Private Drives: 2007 Nissan 350Z Join Date: Sep 2008 Location: CA Posts: 92 iTrader: (0)	6MT ftmfw. tr00f.

10-09-2008, 03:58 PM	#22
sayemthree Brigadier General Drives: ObamieTheKommie Join Date: Aug 2007 Location: ObamaKommieLand Posts: 4,852 iTrader: (0)	not a new problem - repost.