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09-15-2016, 09:31 PM | #1 |
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Shifting issues
Have DCT and this happened twice so far (mind you in 6 yrs of driving) when I press the gas aggressively from a stop, even though I'm in D reg mode, it somehow switches to M1 and gets stuck in 1st until I shift. The shifter was not pushed to the side and remained straight.
Obviously, a software prb but wondering if anyone has any exp? |
09-16-2016, 10:38 AM | #2 |
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Had a 2011 Z4 35i and now a 2016 Z4 35is. Have not experienced what you described on the DCT.
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09-16-2016, 11:00 AM | #3 | |
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09-16-2016, 12:15 PM | #4 |
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Does the switch literally have to be floored to activate? I don't think that I touched the floor but I definitely pressed a big range on the pedal since I wanted to accelerate fast off the line.
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09-16-2016, 12:47 PM | #5 |
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Yes. If you put your foot all the way down you should feel it click. You wouldn't notice it unless you know it was there. It pretty much will downshift gears to get you in the proper rev range. You may have been hitting it accidentally.
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09-16-2016, 01:34 PM | #6 |
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Still, even assuming I hit the switch, it shouldn't be *M*1, right? Rather, it should still remain in *D* and upshift automatically. What happened is that the computer thought I was in manual mode when I'm clearly just in reg D mode.
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09-16-2016, 03:15 PM | #8 |
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09-19-2016, 05:05 PM | #10 |
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There is a strong possibility the OP is on an older software, and depending if its a EU or NA released car may have something to do with it as the logic maybe different.
If you have a DCT Z4 it is highly recommended to keep up to date with the latest BMW software which also has updates for your DCT. |
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09-19-2016, 05:08 PM | #11 | |
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09-19-2016, 05:20 PM | #12 | |
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EU = Europe NA = North America Best advice is not to treat this car like a Automatic, you don't have a torque converter. It's more closer to a manual transmission. Your triggering the transmission safety to protect itself. If you want to get aggressive with the car go into manual mode with Sport button on to avoid clutch slippage. You might want to read this post http://www.e90post.com/forums/showthread.php?t=747010 |
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09-19-2016, 05:30 PM | #13 |
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^Tx for the link. Are we talking about the same thing, though? I'm not experiencing clutch slip, just that it is stuck in 1st gear due to accelerating from a stop even though it should be in automatic (and not manual) mode and I'm expecting an upshift as it reaches the shift pt/rpm.
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09-19-2016, 09:42 PM | #15 | ||
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You're not experiencing clutch slippage..... yet, you are experiencing a safety preventative, so it stops you from shifting till RPMs fall with in safe range or load safe range. If after RPMs fall and you still not able to shift then there is a overheat issue or simply the control valve is stuck (I doubt this is the cause). On the link I provided if you go over the PDF it will let you know how your DCT works. Quote:
Now on the newer BMW software the transmission is updated to tolerate such driving input and will practically up shift the car. |
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09-20-2016, 02:53 AM | #16 | ||
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09-20-2016, 03:01 PM | #17 | |
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Ok apologies, we are looking at this from two different aspects. |
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09-21-2016, 11:55 AM | #18 |
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With it being twice in that time span I'd not worry about it. My E46 over the 10 years and 180,000 miles I drove it has done a few goofy things too. Once it started up and ran on what felt like 3 cylinders but shutting it down and restarting it fixed it. Twice the speedometer needle suddenly was super sluggish for about a minute before starting to respond normally. Our cars have a huge amount of electronics in them; it's not too surprising when it occasionally strokes out and does something it shouldn't.
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09-23-2016, 08:23 AM | #19 | |
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The issue you are describing sounds like a software glitch or hardware issue with either the paddles or the joystick itself. I still have my new shifter sitting on a shelf waiting to install because when i move my shifter left it does not switch to S1. A sensor went bad and yep you guessed it. You cant replace the sensor without replacing the whole shifter. 550.00USD is what i paid for a new one not sure what they are going for now.
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07-31-2023, 11:36 AM | #20 |
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I'm having the same exact issue
So bought my 2015 BMW Z4 28i (msport package) about a year ago. Now i'm experiencing the same issue but in a much worst way. Sometimes when i start my car and engage in D mode, it starts in M1 and will not shift. Sometimes it starts in M2 and it starts shifting sporadically until it engages back to D mode (This keeps happening 2-3 times a week). Now, another issue i noticed with this, when we got the severe heat in VA, it kept starting in M1 mode not in D mode. I would have to turn off the car on and off 2-3 times before it engaged back in D mode. There's gotta be something wrong with wiring? The shifter itself? Software update? Im gonna take it into a BMW expert shop i found this week to see what he says about it. Did anyone find a fix to this specific problem yet?
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07-31-2023, 02:27 PM | #21 | |
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Drives: E89 Atacama Yellow 35is
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How many miles? Checked to fluid level?
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07-31-2023, 05:45 PM | #22 |
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