DCT slam

[M3 n X5M]

OP, if you bought the car from a dealer then maybe it is better you invest the time.

Take the car over, cold in the AM. Don't let them drive it warm. And go for a 20 minute drive with the foreman. You may get lucky and replicate the situation.

Investing a couple hours of your time may be needed at this point.

Also, if it does not happen, offer to leave the car for another cold start the following day. This will all show good faith on your part.

In the meantime, they may scan your car for codes that in combination show a fingerprint of the problem.

Patience in this situation and working with the dealer will solve the problem. I do not advise to work against the dealer. If you show up with a bad attitude you will probably fail to gain a repair.

The tranny seems to be failing.

[BaseM3]

Originally Posted by M3 n X5M

OP, if you bought the car from a dealer then maybe it is better you invest the time.

Take the car over, cold in the AM. Don't let them drive it warm. And go for a 20 minute drive with the foreman. You may get lucky and replicate the situation.

Investing a couple hours of your time may be needed at this point.

Also, if it does not happen, offer to leave the car for another cold start the following day. This will all show good faith on your part.

In the meantime, they may scan your car for codes that in combination show a fingerprint of the problem.

Patience in this situation and working with the dealer will solve the problem. I do not advise to work against the dealer. If you show up with a bad attitude you will probably fail to gain a repair.

The tranny seems to be failing.

Thanks everyone for your inputs. I have a good relationship with the SA and he has been helpful in the past.
This event happened with the engine and trans at operational temp. after coming off a 4 mile cruise on the highway (I have my wife as a witness she thought a did something to the car by accident like bump the shifter). The 1st time this happened (see history) was about 1,5K miles ago when I had only one slam on a downshift to 2nd. Can there be hidden codes that may show up that don't display on the dash?
The car just turned over 20K miles and I have about 5 months left under warranty.
I've tried to reproduce the slamming by driving the exact route and took the car for an extended trip last night without any slamming. The only thing I can sometimes reproduce is a lag in 2nd gear when I go around a right hand corner in the D mode.

[///M Power-Belgium]

Originally Posted by BaseM3

Thanks everyone for your inputs. I have a good relationship with the SA and he has been helpful in the past.
This event happened with the engine and trans at operational temp. after coming off a 4 mile cruise on the highway (I have my wife as a witness she thought a did something to the car by accident like bump the shifter). The 1st time this happened (see history) was about 1,5K miles ago when I had only one slam on a downshift to 2nd. Can there be hidden codes that may show up that don't display on the dash?
The car just turned over 20K miles and I have about 5 months left under warranty.
I've tried to reproduce the slamming by driving the exact route and took the car for an extended trip last night without any slamming. The only thing I can sometimes reproduce is a lag in 2nd gear when I go around a right hand corner in the D mode.

When 5 months left under warranty...take it to your BMW/Dealer and let them test the car a lot, that's the only solution in your case !
When you get your car back, check everything , body...wheels ,scratches ect...even better is... take a lot of pics of your car with date/data , knowing that your car needs to stay at BMW and their reputation when damage... we all know !
Conclusion....
Don't resist and take it in ASAP ! I'm serious thinking that a DCT replacement is required in this case !
And sure i'm truly hoping that i'm wrong , so OP please keep us posted about this problem !

[M3 n X5M]

Originally Posted by ///M Power-Belgium

When 5 months left under warranty...take it to your BMW/Dealer and let them test the car a lot, that's the only solution in your case !
When you get your car back, check everything , body...wheels ,scratches ect...even better is... take a lot of pics of your car with date/data , knowing that your car needs to stay at BMW and their reputation when damage... we all know !
Conclusion....
Don't resist and take it in ASAP ! I'm serious thinking that a DCT replacement is required in this case !
And sure i'm truly hoping that i'm wrong , so OP please keep us posted about this problem !

+1

Time to let your car spend some time at the dealer, until the issue or at least the slow turning issue is reproduced.

Also, the rear diff, and ECU should be checked.

Perhaps, the first step will be to reflash the ECU.

[modkrazy]

That doesn't sound normal. I've only had the DCT slam when launching.

Also, drive in S!

[Goat Rodeo]

Drive a SMG E46 M3 in S6, DCT feels like permanent whiskey dick in comparison.

[BaseM3]

Originally Posted by ///M Power-Belgium

When 5 months left under warranty...take it to your BMW/Dealer and let them test the car a lot, that's the only solution in your case !
When you get your car back, check everything , body...wheels ,scratches ect...even better is... take a lot of pics of your car with date/data , knowing that your car needs to stay at BMW and their reputation when damage... we all know !
Conclusion....
Don't resist and take it in ASAP ! I'm serious thinking that a DCT replacement is required in this case !
And sure i'm truly hoping that i'm wrong , so OP please keep us posted about this problem !

Got my car back from the dealer last night. Of course she didn't act up while they drove her . They searched their data base, checked for faults, checked for signs of damage and found nothing. Told them about the sluggishness when cold and the down shifting around right hand corners. they stated that it is "normal".
In any case the issue has been officially documented so if this happens again I may have some recourse down the line.

[///M Power-Belgium]

Originally Posted by BaseM3

Got my car back from the dealer last night. Of course she didn't act up while they drove her . They searched their data base, checked for faults, checked for signs of damage and found nothing. Told them about the sluggishness when cold and the down shifting around right hand corners. they stated that it is "normal".
In any case the issue has been officially documented so if this happens again I may have some recourse down the line.

Typical !
Indeed, sometimes it's f@cking unbelievable !
Maybe it could be a good idea to put a GoPro cam in your car, and let it roll when the car is cold , and when it happens you can show them the problem ?
Also thanks for posting the update !

[BaseM3]

Originally Posted by ///M Power-Belgium

Typical !
Indeed, sometimes it's f@cking unbelievable !
Maybe it could be a good idea to put a GoPro cam in your car, and let it roll when the car is cold , and when it happens you can show them the problem ?
Also thanks for posting the update !

That may be a good idea, and just keep it running until I get the slamming next time.

[///M Power-Belgium]

Originally Posted by BaseM3

That may be a good idea, and just keep it running until I get the slamming next time.

Exactly !
Please update about your problem,i'm damn curious about this , because i've DCT too

[Sandye90m3]

Originally Posted by BaseM3

Thanks for the info. I'm going to try and reproduce the slam next time I'm out. it definitely didn't sound healthy!
Any suggestions on the DCT tune?

Why would you do that?

[Amirsm3]

I wouldn't reproduce it....just drive normally with the go pro in your car. Chances are, you're not gonna reproduce what you're looking for...you're gonna end up causing a different problem.

[m3ray]

Originally Posted by Sandye90m3

Why would you do that?

Ummm, to get BMW to fix it? OP now has to play the replication game.

Anywho. I am subscribed for outcome

[dmk08]

Originally Posted by m3ray

Ummm, to get BMW to fix it? OP now has to play the replication game.

Anywho. I am subscribed for outcome

Hoping and praying for a DCT issue?

[m3ray]

Originally Posted by dmk08

Hoping and praying for a DCT issue?

Do I need to hope and pray?

[dmk08]

Originally Posted by m3ray

Do I need to hope and pray?

Yes, you do.

[m3ray]

Originally Posted by dmk08

Yes, you do.

Buddy I don't think it's me who needs to hope and pray

[dmk08]

Originally Posted by m3ray

Buddy I don't think it's me who needs to hope and pray

I'm trading my car in on an F8x before the warranty expires. A 6MT one at that... :P

If you want to be worried about something breaking thats legit. It is a BMW

[4corners]

http://www-odi.nhtsa.dot.gov/acms/cs...8V595-9176.pdf

http://www-odi.nhtsa.dot.gov/acms/cs...8V595-9176.pdf

[ChrisF]

'11 DCT with 42K miles. Mine does it too and I drive in shiftlogic mode 3 most of the time. Cannot be reproduced so I'm not going to the dealer. It's a waste of time. If it gets worse or becomes reproducable, maybe then. I had a similar problem with my S4 DSG (which I lemon'd due to this problem). I have come to believe that for 98% of people, DSG, DCT calibrations work perfectly fine. For the other 2%, our inputs are such that the freak out the software and cause shift confusion.

[MFL]

It's your fault for not being WOT.

[tdott]

Originally Posted by Goat Rodeo

Drive a SMG E46 M3 in S6, DCT feels like permanent whiskey dick in comparison.

What are you saying? The SMG shifts faster?