Jerky when decelerating from 3rd to 2nd - DCT

[Park89]

Originally Posted by GrussGott

you're driving in MDM and modding your intake ... but care about jerkiness?

Maybe its intake causing jerkiness. Perhaps still in adaptation process.

[Park89]

Originally Posted by adel335i

I do get the 3-2 gear downshift jerks occasionally when the car is on those settings:
Efficient throttle, D1 and the AIR CONDITIONING ON!

During the good weather (winter months here in the UAE) when I was not using the AC I forgot all about this jerking but now since the temperatures started to creep up and using the AC is a must it started to happen again.

I also felt it is related to how hard I'm applying the brakes, it tends to happen only when the brake force is not very hard, and this why I tend to try and avoid it by braking a "bit" hard when coming to a stop.

Yes, jerking is noticeable when i'm only applying a bit of force on the brake.
I guess the car is too sensitive..?

[Park89]

Originally Posted by f80NJ17

I dont know how you drive. But for me for like 200-400 miles before my break-in i experienced the downshift lag/jerk but it went away.

I guess she is still learning my driving style..

[skalberti]

Originally Posted by geroz1

Get the GTS dct coding and that should help with the jerking and downshifting...

I agree. I drive in D2 90% and the GTS flash smoothed everything out. No more harsh 3-2 shift and the shifting is instantaneous, whether up shift or downshift. This is how BMW should have programmed all the DCT's.

[Park89]

Originally Posted by skalberti

I agree. I drive in D2 90% and the GTS flash smoothed everything out. No more harsh 3-2 shift and the shifting is instantaneous, whether up shift or downshift. This is how BMW should have programmed all the DCT's.

Any side effects having GTS Flash so far?!

[skalberti]

Originally Posted by Park89

Any side effects having GTS Flash so far?!

Nope, I'm loving it more and more each day, especially when driving it hard. The addition of overrun burbles from 4-3 are an added bonus, but the speed of up shifts and downshifts as well as going into R faster and no more harsh 3-2 makes it all worth it.

[geroz1]

Agreed. No side effects other than wanting to switch gears all the time

Not sure if it causes more wear to the transmission but it seems healthier since it's smoother

[Park89]

Originally Posted by skalberti

Nope, I'm loving it more and more each day, especially when driving it hard. The addition of overrun burbles from 4-3 are an added bonus, but the speed of up shifts and downshifts as well as going into R faster and no more harsh 3-2 makes it all worth it.

How much do they charge for the GTS flash???
Now im curious!

[skalberti]

Originally Posted by Park89

How much do they charge for the GTS flash???
Now im curious!

PM sent

[sjuhawks19]

I get it too from time to time, especially in sport or sport+, tranny in any level. Just feels like the car is downshifting and it can be jerky. I have 2800 miles on my car and honestly I'm just used to it now. I had an Audi S4 previously and the DSG in that honestly felt completely different. The Audi felt more like a conventional automatic, very smooth. The M3 feels like it's a manual transmission (I've owned 2 manuals previously) without the clutch pedal.

[GrussGott]

It's all just a preference thing so there's no right answer, but I guess I didn't get the M4 for it's smoothness, rather for its sport qualities, and "jerky" feels aggressive and sporty to me.

I like my car to be a vicious bitch.

Pro Tip: that quality isn't as appealing in wives.

[mrgicm]

I have the GTS flash and still have jerking from 3rd to 2nd when lightly pressing the brake...

[M3 Pilot]

F80 M3 ZCP 3rd to 2nd has quite a bit of jerk when decelerating with no throttle. I'm still running in the car but this shouldn't cause the jerk.

I believe this is a problem carried over as my E92 M3 ZCP also has a 3rd to 2nd gear jerk.

[GrussGott]

Do you guys ever feel that life, much like this thread, is a merry-go-round and you have so little energy you just can't even?

[Brindle101]

Originally Posted by Park89

So my 2017 F80 M3 Competition package with DCT is pretty jerky when it decelerates from 3rd to 2nd gear. (automatic mode)

My setting is "efficient (engine), comfort (chassis), Comfort (steering)" as daily drive (automatic). I only switch to manual mode when I'm on the highway.

So my story is, I get this very uncomfortable feeling when the gear switches from 3rd to 2nd gears whenever the car comes to a stop light or w/e the decelerating situation is.. Car literally jerks too hard.. But not always!

Does anyone experience the same situation as i do?

I've read few posts about the car being jerky driving in low gears but never saw the threads about jerky when decelerating.

Please share any thoughts!!

Thanks in advance!

This is NOT an automatic, if is an automated manual. As such it will shift more like a manual, you will get some jerkiness and engine drag. That is part of the experience, to make sure the driver knows it is not an automatic but manual. In s3 (sport plus) it will downshift even more aggressively. If you want an automatic or auto feel you should get a non-M BMW. To each his own, but I always drive in sport plus everything. Usually manual mode, only auto mode when I want the car to downshift aggressively and I'm not in the mood to shift myself. I can see comfort everything if you are on a very bumpy road or taking the wife to dinner, but to drive in comfort everything all the time, I would ask the rhetorical question, "Why buy an M?"

[ryou]

yea it jerks, 2nd week with the car, and i feel its quite jerky. (not my first DCT, came from a GLA45 AMG, which was buttery smooth shifts in town traffic)

Yesterday coming in fast and exiting a roundabout, i lifted off my foot and it jerked back and forth 3-4 times, Traction control came on as well.

Still getting used to it, certainly very diffrent to my 335i autogear box, very diffrent to my GLA45 and Mk5 GTI gearbox

[Brindle101]

Originally Posted by ryou

yea it jerks, 2nd week with the car, and i feel its quite jerky. (not my first DCT, came from a GLA45 AMG, which was buttery smooth shifts in town traffic)

Yesterday coming in fast and exiting a roundabout, i lifted off my foot and it jerked back and forth 3-4 times, Traction control came on as well.

Still getting used to it, certainly very diffrent to my 335i autogear box, very diffrent to my GLA45 and Mk5 GTI gearbox

Just wondering if it is a transmission jerkiness, or if unknowingly you are jerking on/off the accelerator a little bit. If I am not smooth in first or if road is not smooth mine will jerk in first because accelerator is very sensitive.

You can always bring in for service and have it looked at.

Good luck.

[delpier]

And what about.. First run in the morning (colder morning) and if you start moving and first change from 1st to 2nd gear ( in D or S - just first change, later is ok)? Do you hear or feel bang / hard jerk?

[aajjcc]

Originally Posted by delpier

And what about.. First run in the morning (colder morning) and if you start moving and first change from 1st to 2nd gear ( in D or S - just first change, later is ok)? Do you hear or feel bang / hard jerk?

yep, feels and sounds like something might've snapped off

[delpier]

I think, that first gear change is better if: start moving, than depress gas pedal, change gear manualy and again slightly press gas pedal.
If I drive in D, even if slightly moving I can feel hard jerk, but just for first change (later is ok and I think that jerky change from 3 to 2 also gone, - I have 10.000km / 6.000 miles).

[GrussGott]

Like this?

[delpier]

super, finally someone made a video