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      02-09-2013, 08:44 PM   #1
besiktas
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Weird thing happened to me today

I came out of the highway at 60mph to a full stop on a hill before merging on to local traffic. Afterwards i tried to continue driving but the car wouldnt move. I checked the dash and it said D7 (E92 DCT) which surprised me because the car was stationary and it should have shifted to D1 automatically. anyway, after giving a little push to the gas the car then shifted to 2nd and started moving.

Does this indicate a problem with my transmission? Did anyone experienced a similar problem too?

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      02-09-2013, 09:05 PM   #2
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Where you in "D" (auto mode)? If so, were you in D1?

In my SMG equipped M5, I have this issue sometimes where the car gets confused. In D1, the car will start in 2nd gear, but sometimes it's in first and has to up shift to 2nd.
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      02-09-2013, 09:30 PM   #3
besiktas
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so when i pressed the gas it felt like as if the car was in neutral. but at around 600-700 rpm it moved forward maybe like 1 mph, then i looked at the dashboard it was sayying D7. Then i hit the brakes (scared it would go backwards since i was on a hill) then gave a bit harder push on the gas, it shifted to 2nd and kept moving normal.
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      02-09-2013, 09:40 PM   #4
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Quote:
Originally Posted by besiktas View Post
so when i pressed the gas it felt like as if the car was in neutral. but at around 600-700 rpm it moved forward maybe like 1 mph, then i looked at the dashboard it was sayying D7. Then i hit the brakes (scared it would go backwards since i was on a hill) then gave a bit harder push on the gas, it shifted to 2nd and kept moving normal.
were you in D mode or manual mode? If in D mode, were you in D1? Or does that not apply with DCT?
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      02-09-2013, 11:03 PM   #5
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You gotta love DCT..
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      02-09-2013, 11:22 PM   #6
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If you're not having any issues now I wouldn't worry about it, probably a DCT glitch. If you lost gears 1,3 and 5 there is definitely an issue - but you should receive a transmission malfunction error. (1, 3 and 5 are on one clutch and 2, 4, 6 and R are on the other one).
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      02-10-2013, 12:06 AM   #7
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Seventh gear at a dead stop is not supposed to happen. And it never has to me. I would call a service guy and talk it over with him.
Are you positive you saw a "7" and not a "2"? The reason I ask is because you said the car eventually started off in second gear. That can happen if you have selected that performance option. (I refer you to the manual, but, believe that would be one vertical bar). When you select this option, the car comes to a stop in second gear (showing 2D on the dash) not first gear and, of course, you start off in second. From my experience with this condition, the take off in second is surprisingly very slow and requires quite a shove on the gas pedal. And that's on flat ground. On a hill such as the one you were on, I can see where starting off in second could be an alarmingly sluggish process.
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      02-10-2013, 12:12 AM   #8
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Quote:
Originally Posted by fuddman View Post
Seventh gear at a dead stop is not supposed to happen. And it never has to me. I would call a service guy and talk it over with him.
Are you positive you saw a "7" and not a "2"? The reason I ask is because you said the car eventually started off in second gear. That can happen if you have selected that performance option. (I refer you to the manual, but, believe that would be one vertical bar). When you select this option, the car comes to a stop in second gear (showing 2D on the dash) not first gear and, of course, you start off in second. From my experience with this condition, the take off in second is surprisingly very slow and requires quite a shove on the gas pedal. And that's on flat ground. On a hill such as the one you were on, I can see where starting off in second could be an alarmingly sluggish process.
this

you explained it better than I did. I have the same issue with SMG when in D1, where the car starts in 2nd gear.
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      02-10-2013, 12:13 AM   #9
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Quote:
Originally Posted by mdyaman View Post
were you in D mode or manual mode? If in D mode, were you in D1? Or does that not apply with DCT?
It only shows the number when you're in manual (S) mode. D7 is D mode, 7th gear, which as mentioned, should never happen when stopped. I think what you're asking is, what drivelogic setting he was in, which, he hasn't mentioned yet. DCT will start off in 2nd gear in drivelogic mode 1, and 1st gear in all other modes.
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      02-10-2013, 12:27 AM   #10
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Quote:
Originally Posted by e1000 View Post
It only shows the number when you're in manual (S) mode. D7 is D mode, 7th gear, which as mentioned, should never happen when stopped. I think what you're asking is, what drivelogic setting he was in, which, he hasn't mentioned yet. DCT will start off in 2nd gear in drivelogic mode 1, and 1st gear in all other modes.
yes, thank you. I was inquiring which drive logic setting he was in.
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      02-10-2013, 12:40 AM   #11
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Sounds like the DCT software had a momentary brain fart.
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      02-10-2013, 11:15 AM   #12
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to clear the confusion, the car was in automatic mode (not manual) and drivelogic was in 3rd bar.

I am sure it said D7. I did use D2 to move from stand still before. it felt nothing like it.
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      02-10-2013, 11:27 AM   #13
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I test drove a 2013 with DCT recently and found that it had strange behavior at low speeds and starting on a slight incline. It felt like I was driving a manual transmission car but someone else was controlling the clutch and trying to guess what I was doing. Which, I suppose, is exactly what the DCT actually does.
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      02-10-2013, 02:01 PM   #14
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I rarely drive in D mode and in manual mode it will usually drop down appropriately but I've had a few instances where it doesn't drop to second when it should and I have to manually downshift.

In D it seems to manage itself better when downshifting in everyday traffic.

Last edited by 1fastdoc; 02-10-2013 at 02:59 PM.
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      02-10-2013, 10:40 PM   #15
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happened again tonight, went back again to the same area trying to duplicate it so that i can record it, it didnt happen. what the fuck is wrong with my transmission.
I am going crazy over here
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      02-10-2013, 10:46 PM   #16
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You probably have to reset the DCT adaptions..

When a computer is doing the shifting for you...it develops learned algorithams..
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      02-10-2013, 11:06 PM   #17
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Quote:
Originally Posted by 1fastdoc View Post
I rarely drive in D mode and in manual mode it will usually drop down appropriately but I've had a few instances where it doesn't drop to second when it should and I have to manually downshift.

In D it seems to manage itself better when downshifting in everyday traffic.
DCT only downshifts in S (manual) mode to prevent the car from stalling or when you come to a complete stop it will drop it down to 1st. Otherwise, there is a chance in S mode you will bog your engine quite badly if you're slowing down but don't come to a complete stop and need to accelerate again.

Quote:
Originally Posted by besiktas View Post
happened again tonight, went back again to the same area trying to duplicate it so that i can record it, it didnt happen. what the fuck is wrong with my transmission.
I am going crazy over here
Interesting. If you can get it on video that would be ideal.
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      02-11-2013, 01:40 AM   #18
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Quote:
Originally Posted by e1000 View Post
DCT only downshifts in S (manual) mode to prevent the car from stalling or when you come to a complete stop it will drop it down to 1st. Otherwise, there is a chance in S mode you will bog your engine quite badly if you're slowing down but don't come to a complete stop and need to accelerate again.
Incorrect.

From your owner's manual:
Quote:
Sequential Mode
Shortly before the vehicle slows down to below the minimum speed of the gear currently engaged, the transmission automatically shifts down without requiring your intervention.
On feature of the DCT, even in S mode is to control downshifts appropriately. It does so before the engine will bog from trying to work against a taller gear. I only brought it up because I've noticed lately that sometimes it will only drop to 3rd as opposed to 2nd, which I prefer. Might have something to do with me taking turns at 20mph though.

Also, if you drive this way you'll discover that it doesn't simply drop a gear to avoid bog. It will skip gears and select the appropriate gear. Nearly all of my driving is city and as I mentioned before, it's only happened a few times as of late and I suspect the adaptive capability has something to do with it.
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      02-11-2013, 02:05 AM   #19
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Quote:
Originally Posted by 1fastdoc View Post
Incorrect.

From your owner's manual:


On feature of the DCT, even in S mode is to control downshifts appropriately. It does so before the engine will bog from trying to work against a taller gear. I only brought it up because I've noticed lately that sometimes it will only drop to 3rd as opposed to 2nd, which I prefer. Might have something to do with me taking turns at 20mph though.

Also, if you drive this way you'll discover that it doesn't simply drop a gear to avoid bog. It will skip gears and select the appropriate gear. Nearly all of my driving is city and as I mentioned before, it's only happened a few times as of late and I suspect the adaptive capability has something to do with it.
I fail to see the difference in what I said versus what's in the manual. It will downshift but only to the extent to prevent stall. Most of the time it will leave you in an unnecessarily high gear and sometimes you will bog quite badly
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      02-11-2013, 06:43 AM   #20
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Same thing happened to me in my E60 M5 a few times, it always corrected itself once I fully removed my foot from the throttle and re-engaged. One time I distinctly remember a pretty violent 'clunk' when it down shifted under load, it was very concerning...a couple month later the clutch gave out. That was the old SMG, seems the new DCT still has some of the same quirks.
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Last edited by Curt2000; 02-11-2013 at 07:34 AM.
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      02-11-2013, 10:15 PM   #21
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Quote:
Originally Posted by e1000 View Post
I fail to see the difference in what I said versus what's in the manual. It will downshift but only to the extent to prevent stall. Most of the time it will leave you in an unnecessarily high gear and sometimes you will bog quite badly
Semantics I suppose but I read what you wrote as a failsafe to prevent stalling that WILL allow the engine to bog and possible put undue stress on drivetrain.

The DCT has a few computer controlled systems that assist when needed, one of which is the ability to downshift to an appropriate gear before the engine bogs or comes anywhere near stalling.
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