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      09-16-2019, 01:37 AM   #23
oinkoink
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I've had this same problem for the past month now. It has come to the point that this problem occurs every time I drive now. Now I'm forced to drive on auto Did any of you have this problem become as frequent? At first I thought it must be a software problem but now that it has become so frequent, I'm starting to think it might be something more serious
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      09-16-2019, 02:19 AM   #24
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Quote:
Originally Posted by oinkoink View Post
I've had this same problem for the past month now. It has come to the point that this problem occurs every time I drive now. Now I'm forced to drive on auto Did any of you have this problem become as frequent? At first I thought it must be a software problem but now that it has become so frequent, I'm starting to think it might be something more serious
Get the software updated and go from there, unless the transmission ECU has codes stored.

May I also point out to some previous posters that despite the car having two clutches, it does not always have the correct gear ready. If you are in 5th gear, the other clutch has 6th or 4th, if the clutch has 6th but you shift to 4th there will be a delay while it selects 4th. So, some delay would sometimes be normal but not every shift.
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      09-16-2019, 03:07 AM   #25
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If on no throttle downshifts arent instant

Dct can readily select any gear
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      03-02-2023, 10:22 AM   #26
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Sorry to revive a old thread. But I recently noticed a issue on my 13 with 40k. Just a bit of background...I'm a mechanic and have been building BMWs for well over 20 years, but no means a expert on transmissions...I'll leave that to the specialists. But I just did a DCT service with everything from suction filter, and pressure filter...to using ISTA to do the oil balancing. I only really did this because I noticed a bit of weirdness upon take off and reversing, felt as though the DCT had low oil. So I just did the complete service. Although it feels better all around...I feel a slight delay on downshifting. I blip a downshift, the engine rev matches immediately, but the car itself feels like it doesn't catch the gear and slow down as fast as the engine feels the gear. Does that make sense? Could it be the clutches in my rear end? There is no slop in the driveline(I couldn't feel any sort of slop in the driveshaft). I hope somebody can chime in with some info. Thanks

Edit: I do the rear diff oil chamge every 2nd engine oil change. Also everything looked good on the Blackstone oil analysis.
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      03-02-2023, 11:07 AM   #27
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Quote:
Originally Posted by DiskoSleaZe View Post
Sorry to revive a old thread. But I recently noticed a issue on my 13 with 40k. Just a bit of background...I'm a mechanic and have been building BMWs for well over 20 years, but no means a expert on transmissions...I'll leave that to the specialists. But I just did a DCT service with everything from suction filter, and pressure filter...to using ISTA to do the oil balancing. I only really did this because I noticed a bit of weirdness upon take off and reversing, felt as though the DCT had low oil. So I just did the complete service. Although it feels better all around...I feel a slight delay on downshifting. I blip a downshift, the engine rev matches immediately, but the car itself feels like it doesn't catch the gear and slow down as fast as the engine feels the gear. Does that make sense? Could it be the clutches in my rear end? There is no slop in the driveline(I couldn't feel any sort of slop in the driveshaft). I hope somebody can chime in with some info. Thanks

Edit: I do the rear diff oil chamge every 2nd engine oil change. Also everything looked good on the Blackstone oil analysis.
Normally diff oil gets changed say every 20k but BMW say DCT oil is in for life, mine's at 41k and I have no intention of changing it.
It's unlikely that the double clutches are worn so I'd just give it more time to 'get used' to the new trans fluid.
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      03-02-2023, 11:13 AM   #28
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Quote:
Originally Posted by M5Rick View Post
Normally diff oil gets changed say every 20k but BMW say DCT oil is in for life, mine's at 41k and I have no intention of changing it.
It's unlikely that the double clutches are worn so I'd just give it more time to 'get used' to the new trans fluid.
Yea I'm pretty OCD about oil changes. I've had diffs seize up on me in the past, so I get pretty anal about it. And no oil is "for life". That's for people buying BMWs and having warranty or turning them in after the lease. For us lifers, changing every fluid in the car is a necessity for long-term use. I'll keep digging around.
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      03-02-2023, 12:07 PM   #29
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Quote:
Originally Posted by DiskoSleaZe View Post
Yea I'm pretty OCD about oil changes. I've had diffs seize up on me in the past, so I get pretty anal about it. And no oil is "for life". That's for people buying BMWs and having warranty or turning them in after the lease. For us lifers, changing every fluid in the car is a necessity for long-term use. I'll keep digging around.



I dont own a F10 yet but I still have my e92 M3. Lot of tuners out there offer a DCT GTS tune and that made a night and day difference in my M3 no more delays that it used to randomly have.

Might be worth looking into an aftermarket DCT tune. Doesn't cost much and should improve timing. After quickly going over this thread it seems to be software related.
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      03-02-2023, 01:49 PM   #30
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Quote:
Originally Posted by DJiGGs View Post
I dont own a F10 yet but I still have my e92 M3. Lot of tuners out there offer a DCT GTS tune and that made a night and day difference in my M3 no more delays that it used to randomly have.

Might be worth looking into an aftermarket DCT tune. Doesn't cost much and should improve timing. After quickly going over this thread it seems to be software related.
Yea I have Xhp for this car but I uninstalled it before the DCT service. I'm going to reinstall this weekend and see how it reacts. It brings the line pressure from 18 to 20 bar. I'll report back. But the feedback is much appreciated.

Last edited by DiskoSleaZe; 03-02-2023 at 10:47 PM..
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