DCT Judder

[M5 RAG]

Hi Guys,

As above on a couple of occasions if I reverse when the car is cold up a sloped driveway (not very steep, just slight incline), the clutch seems to judder slightly on take-up . Anyone else noticed this or is it a trip to the dealer? Not sure if its temperature related, I haven't had the car long and its only done it when its been about 4 degrees C outside.

The car is an early 2013, so probably built late 2012, 20k miles on the clock.

Any advice appreciated.

[Mbbrewer]

Mine does it too 2013 550i

[M5 RAG]

Originally Posted by Mbbrewer

Mine does it too 2013 550i

Thats interesting but I doubt it will be the same issue as I believe your car has a conventional torque converter auto box not a DCT.

Unless of course the judder is unrelated to the DCT, it certainly feels like mild clutch judder to me

[GratefulM5]

2014 LCI... I notice it occasionally to. I feel as though it's a little smoother if I feather the gas very gradually

[dhirm5]

Yes - you have to drive it as if it were a conventional manual - you can wind up juddering on occasion - even in second.

[Dionysus]

My DCT has juddered on one occasion in D whilst driving through heavy traffic when I wasn't particularly gentle with the throttle pedal. Other than that it's always been very smooth. Far better than our DSG equipped car which can almost stall when under load during cold start/low speed manoeuvring.

[M5 RAG]

Thanks for the replies Guys, glad to hear its not a unique issue with my car, I obviously need get used to the car!

[avlnch]

When cold starting the car, it's a good idea to stay still until the RPM's drop down to normal idle (takes between 10-20 seconds). Then once it's at normal idle you can put it in D/R gear and move.

[Jay-K]

What does judder mean here,
i have problem when the car is incline (forward)
and something's like holding the drive shaft and diff,

[M5 RAG]

Originally Posted by Jay-K

What does judder mean here,
i have problem when the car is incline (forward)
and something's like holding the drive shaft and diff,

Judder; meaning shudder or vibration through the transmission. These cars have hill start assist, the car holds the brakes for a few seconds on inclines after you release brake peddle, its designed to stop you rolling backwards during the transition from brake to accelerator - Perhaps this is what you are describing.

[Jay-K]

Originally Posted by M5 RAG

Judder; meaning shudder or vibration through the transmission. These cars have hill start assist, the car holds the brakes for a few seconds on inclines after you release brake peddle, its designed to stop you rolling backwards during the transition from brake to accelerator - Perhaps this is what you are describing.

so are you saying what i'm experiencing is normal as well,
the other day the dealer said it was normal since the motoric is braking, however i climb the incline directly without braking and at times these vibrations kept vibrating and making noise….
(comes from around the middle rear part of the car…) -
confusion, the car was scanned and no fault appeared..

so what should i do guys?

[M5 RAG]

Originally Posted by Jay-K

so are you saying what i'm experiencing is normal as well,
the other day the dealer said it was normal since the motoric is braking, however i climb the incline directly without braking and at times these vibrations kept vibrating and making noise….
(comes from around the middle rear part of the car…) -
confusion, the car was scanned and no fault appeared..

so what should i do guys?

Perhaps this is similar to what I was querying, simple case of DCT clutch judder in certain situations.

[emmfive]

Originally Posted by Jay-K

so are you saying what i'm experiencing is normal as well,
the other day the dealer said it was normal since the motoric is braking, however i climb the incline directly without braking and at times these vibrations kept vibrating and making noise….
(comes from around the middle rear part of the car…) -
confusion, the car was scanned and no fault appeared..

so what should i do guys?

The noise you hear may be the differential doing its thing. I can hear the diff moving around every time I go up the big bump at the front of my driveway. My 13 did the same thing so im not concerned.

[Niko1414]

My driveway has an inline so the car does it all the time even on the new M6 GC

[sharifm3]

Reversing the car on an incline is one of the worse things you can do to your dtc clutch.

The juddering you're feeling is the clutch engaging and disengaging. You're putting a lot of extra wear on whichever clutch controls reversing.

[Jay-K]

Originally Posted by chrisratz

The noise you hear may be the differential doing its thing. I can hear the diff moving around every time I go up the big bump at the front of my driveway. My 13 did the same thing so im not concerned.

Okay then, i guess i don't have to bring my car in to the dealership ?

[lumberman]

Mine does the same, I guess is not temperature related, is more like torque delivery, in 2nd gear slow incline, if rpm below 2000, dct tends to down shift to 1st but at the same time, the car efficient programming try to stay in higher gear, that's why the clutch engage and disengage.

I change the shift speed to level two and the problem goes away, but then again, its annoying to change it everytime you start the car

[DrewM5]

Originally Posted by sharifm3

Reversing the car on an incline is one of the worse things you can do to your dtc clutch.

The juddering you're feeling is the clutch engaging and disengaging. You're putting a lot of extra wear on whichever clutch controls reversing.

So how do you suggest we back up an incline?

[M5 RAG]

Originally Posted by sharifm3

Reversing the car on an incline is one of the worse things you can do to your dtc clutch.

The juddering you're feeling is the clutch engaging and disengaging. You're putting a lot of extra wear on whichever clutch controls reversing.

I'm a bit puzzled as to how reversing up an incline is any more harmful to a DCT than driving forwards up an incline - please explain?

[sharifm3]

Originally Posted by DrewM5

So how do you suggest we back up an incline?

Hi,

Ill first say I don't have an m5 yet. I do have a ton of experience with my old e46 smg m3's. Same concept though.

It's especially worse if you're reversing slowly up an incline which most rational drivers do : )

If you can find a way to go up the incline facing forward you're better off.

[sharifm3]

Originally Posted by M5 RAG

I'm a bit puzzled as to how reversing up an incline is any more harmful to a DCT than driving forwards up an incline - please explain?

I guess it has to do with the speed we reverse at vs the speed we drive forward.

[sharifm3]

I shouldn't even say the speed we reverse at vs the speed we drive forward at.

It's all about the way we use the throttle while reversing vs driving forward.