DCT Jerkiness on manual upshift

speedracerlo · 03-23-2015, 08:24 PM

I've recently noticed a jerk when I manually upshift around 4k RPM. It seems to do it in all gears from 1 to 7 and it feels like a bad shift on a MT where you feel the clunk. Only happens when I'm aggressively pushing the throttle and shifting near the 4k RPM mark. Anything below or over that RPM seems to shift much smoother. Just curious if something is wrong with my DCT. Anyone else have this experience?

potassium3000 · 03-23-2015, 10:49 PM

isn’t that just normal S3 setting behaviour as its the most aggressive shift setting - mine also does it but was expecting it as all reviews state this occurs to achieve the speed ?

speedracerlo · 03-24-2015, 12:59 AM

I tested this on comfort mode and it still seems to have the jerk. Was reading something about ECU adaptation that might be causing this.

C5driver · 03-25-2015, 10:10 AM

Quote:

Originally Posted by speedracerlo

I tested this on comfort mode and it still seems to have the jerk. Was reading something about ECU adaptation that might be causing this.

Check with your SA?

Majestic · 03-27-2015, 07:16 AM

A jerk and an audible clunk? I think mine makes a clunk/noise of some sort.. but a jerk? Sounds like my older SMG Trans

PhantomCypher · 04-04-2015, 04:34 PM

I also feel a jerk when aggressively shifting manually in S3. I think it's normal because the car has to time the shift regardless of when you click the paddle to match the engine revs.

rsr racer · 04-04-2015, 10:27 PM

Quote:

Originally Posted by speedracerlo

I've recently noticed a jerk when I manually upshift around 4k RPM. It seems to do it in all gears from 1 to 7 and it feels like a bad shift on a MT where you feel the clunk. Only happens when I'm aggressively pushing the throttle and shifting near the 4k RPM mark. Anything below or over that RPM seems to shift much smoother. Just curious if something is wrong with my DCT. Anyone else have this experience?

Why short shift? I don't go into manual mode unless I plan on keeping it above 5k. Otherwise let the tranny do the work.

03-23-2015, 08:24 PM	#1
speedracerlo Captain 306 Rep 676 Posts Drives: 2015 M6 Gran Coupe Join Date: Oct 2011 Location: Downtown Los Angeles iTrader: (1) Garage List 2018 Porsche 971 Pa ... [0.00] 2015 BMW M6 Gran Coupe [10.00]	DCT Jerkiness on manual upshift I've recently noticed a jerk when I manually upshift around 4k RPM. It seems to do it in all gears from 1 to 7 and it feels like a bad shift on a MT where you feel the clunk. Only happens when I'm aggressively pushing the throttle and shifting near the 4k RPM mark. Anything below or over that RPM seems to shift much smoother. Just curious if something is wrong with my DCT. Anyone else have this experience?
	Appreciate 0 Tweet Quote

03-23-2015, 10:49 PM	#2
potassium3000 Enlisted Member 7 Rep 46 Posts Drives: M6 GC Join Date: Mar 2015 Location: Wolverhampton, UK iTrader: (0)	isn’t that just normal S3 setting behaviour as its the most aggressive shift setting - mine also does it but was expecting it as all reviews state this occurs to achieve the speed ?
	Appreciate 0 Quote

03-24-2015, 12:59 AM	#3
speedracerlo Captain 306 Rep 676 Posts Drives: 2015 M6 Gran Coupe Join Date: Oct 2011 Location: Downtown Los Angeles iTrader: (1) Garage List 2018 Porsche 971 Pa ... [0.00] 2015 BMW M6 Gran Coupe [10.00]	I tested this on comfort mode and it still seems to have the jerk. Was reading something about ECU adaptation that might be causing this.
	Appreciate 0 Quote

03-27-2015, 07:16 AM	#5
Majestic Private 52 Rep 69 Posts Drives: 2014 Bmw M6 Join Date: Jul 2011 Location: Reston, Va. iTrader: (0)	A jerk and an audible clunk? I think mine makes a clunk/noise of some sort.. but a jerk? Sounds like my older SMG Trans __________________ 2014 BMW M6: Competition/Executive/Drivers assist+/Carbon Ceramic brakes, B&O Sound, Nightvision, Escort 9500Ci w/ laser shifters, AMS Catless DP's, Akrapovic Evolution exhaust, Dinan Stage 2 ECU Piggyback, Dinan Intakes, Full Vorsteiner accents, M Performance steering wheel, carbon fiber shifter, Awron vent gauge. 2017 BMW X6M: In the process of modding
	Appreciate 0 Quote

04-04-2015, 04:34 PM	#6
PhantomCypher Private First Class 30 Rep 165 Posts Drives: Ferrari FF, Hellcat, Maserati Join Date: Aug 2012 Location: AZ iTrader: (0)	I also feel a jerk when aggressively shifting manually in S3. I think it's normal because the car has to time the shift regardless of when you click the paddle to match the engine revs. __________________ ///M PhantomCypher
	Appreciate 0 Quote