M-DCT Semantics and Subtleties

[tisme]

Originally Posted by ss134

Regarding holding the vehicle on inclines- there is no need to use the accelerator to hold the car on an incline - the car will hold itself for upto 2 seconds after the brake is released ( it will not roll back during that time) to allow you to move your foot from the brake to the accelerator . Once you touch the accelerator you will move of up the incline.

Thank you everyone for your replies.

On an incline, with an MT, I have engaged the handbrake and release it as I lift my foot off the clutch as the clutch engages and bites.

Are you suggesting with the DCT I have a choice of releasing the foot off the footbrake and immediately transferring it to the gas peddal.

Or, could I use the handbrake and do the biting thing with the DCT?

I'm beginning to think that I have to think in a very different way with a DCT after having only driven manuals for 10s of years.

[tisme]

Originally Posted by ChesterM4

Good thread, I'd assumed it would behave like the 8 speed ZF auto, but the lack of creep is interesting at rest. Will need to be a little aware in the first weeks.

I agree a good thread, but I expect that within a day or two driving with DCT will come naturally, and I'm picking mine up in 5 weeks 1 hour and 22 minutes.

[ss134]

Originally Posted by tisme

Thank you everyone for your replies.

On an incline, with an MT, I have engaged the handbrake and release it as I lift my foot off the clutch as the clutch engages and bites.

Are you suggesting with the DCT I have a choice of releasing the foot off the footbrake and immediately transferring it to the gas peddal.

Or, could I use the handbrake and do the biting thing with the DCT?

I'm beginning to think that I have to think in a very different way with a DCT after having only driven manuals for 10s of years.

Release the handbrake , take your right foot off the brake and apply accelerator. You will not roll back, just move off.

Stop worrying, like I said I had driven only MT cars for 20 years before my first DCT. It is very simple and intuitive. You will find it easy.

[JustChris]

Originally Posted by tisme

I agree a good thread, but I expect that within a day or two driving with DCT will come naturally, and I'm picking mine up in 5 weeks 1 hour and 22 minutes.

Cheers, are still set on SO? I'm wavering! Can't wait tillage first 1200 are done and I can play with launch control and put the DCT to the test.

[jc05e46m3]

Originally Posted by SD Z4MR

A good reason to never take your new M3/M4 DCT to a car wash! Can you trust the car wash jockeys to do this? Always hand wash your car!

[TurboSid]

surprisingly different from the 335is DCT

[tisme]

Originally Posted by ChesterM4

Cheers, are still set on SO? I'm wavering! Can't wait tillage first 1200 are done and I can play with launch control and put the DCT to the test.

Yes, SO car will be driven by me on the 20th June; I've stopped worrying about DCT and will assume I'll master it.

Dealer can't release car to me until 10am on the 21st, but I'm driving it on trade plates on the 20th. 32 days to go!

I'll post pictures as soon as I can.

[CanAutM3]

Originally Posted by tisme

Thank you everyone for your replies.

On an incline, with an MT, I have engaged the handbrake and release it as I lift my foot off the clutch as the clutch engages and bites.

Are you suggesting with the DCT I have a choice of releasing the foot off the footbrake and immediately transferring it to the gas peddal.

Or, could I use the handbrake and do the biting thing with the DCT?

I'm beginning to think that I have to think in a very different way with a DCT after having only driven manuals for 10s of years.

The E9X and F8X are equipped will hill assist. The brakes remain applied for a few seconds after you release them to prevent the car rolling back. It gives you enough time to apply throttle and get going forward. This feature is also available on 6MT cars.

[tooch]

Can't wait to get my first dct, really excited about it.

[ake]

Originally Posted by tooch

Can't wait to get my first dct, really excited about it.

Ditto.
Even though I permanently think about switching to MT. Probably until it is too late. And then I'll love it!

[tooch]

Originally Posted by ake

Ditto.
Even though I permanently think about switching to MT. Probably until it is too late. And then I'll love it!

Same here MT is lots of fun as always (can't be replaced) I gotta go with the tech though.

[tisme]

Originally Posted by CanAutM3

The E9X and F8X are equipped will hill assist. The brakes remain applied for a few seconds after you release them to prevent the car rolling back. It gives you enough time to apply throttle and get going forward. This feature is also available on 6MT cars.

So, if I apply the throttle almost immediately, will the "hill assist" feature release the brakes quicker than the feature might normally do. (24 days to go)

[CanAutM3]

Originally Posted by tisme

So, if I apply the throttle almost immediately, will the "hill assist" feature release the brakes quicker than the feature might normally do. (24 days to go)

In my experience, it releases the brake as soon as throttle is applied.

If you don't apply throttle, after a few seconds it releases the brake and, if you are on a hill, the car starts rolling (through gravity, not under its own power).

[tisme]

Originally Posted by CanAutM3

In my experience, it releases the brake as soon as throttle is applied.

If you don't apply throttle, after a few seconds it releases the brake and, if you are on a hill, the car starts rolling (through gravity, not under its own power).

Thank you, and that is logical. it's hard to believe I get to drive mine in 22 days now.

[Swancoat]

Originally Posted by CanAutM3

The E9X and F8X are equipped will hill assist. The brakes remain applied for a few seconds after you release them to prevent the car rolling back. It gives you enough time to apply throttle and get going forward. This feature is also available on 6MT cars.

Hill assist on DCT? BMW's really catering to the segment of the population that only has one leg with this one.

[///ADMAN]

What happens if you are driving in reverse at speed and open the door?

At slow speeds, the DCT will automatically go back into park. I have had this happen a few times slowly backing out of my driveway with the door opened. It will move about a foot or so and then forcefully go back into park. I mean forcefully too. Haven't tried while moving forward yet. Skerd.

[///ADMAN]

Originally Posted by ss134

Parking the car and engaging reverse is easy- you will have no problem at all.

Actually, I disagree with this statement. I have a 335is with DCT that I normally drive in Sport/Sport mode. When trying to go into Reverse, you must first push the lever back into the center before you can move it to Reverse. You cannot go directly from D Sport/Sport to Reverse. And then, if you go into Park you have to press the Sport button again once you have returned to Drive. It does not stay engaged.

Check out my Driving Mode Video starting at 12:50

[ss134]

Originally Posted by ///ADMAN

Actually, I disagree with this statement. I have a 335is with DCT that I normally drive in Sport/Sport mode. When trying to go into Reverse, you must first push the lever back into the center before you can move it to Reverse. You cannot go directly from D Sport/Sport to Reverse. And then, if you go into Park you have to press the Sport button again once you have returned to Drive. It does not stay engaged.

Check out my Driving Mode Video starting at 12:50

Well, I disagree with you!! M DCT does not do this, it is very easy to engage reverse and will not change any modes. Do not confuse your DCT with the M DCT. See the 50 second video below, at the end of some hard driving he engages reverse.... looks rather easy I'm sure you'll agree?

[///ADMAN]

My point exactly. Same thing with M DCT. Looks like you cannot be in D+/- and then push it straight into R. You have to go back to D (like he did when he pushed the lever back into the center) and then pushed it into R.

Thanks for the video proof by the way...

[CanAutM3]

Originally Posted by ///ADMAN

My point exactly. Same thing with M DCT. Looks like you cannot be in D+/- and then push it straight into R. You have to go back to D (like he did when he pushed the lever back into the center) and then pushed it into R.

Thanks for the video proof by the way...

It seems you don't understand M-DCT. The DCT on ///M models is programmed to mimic a manual transmission, while in regular models it is programmed to mimic an automatic transmission, the DCT doesn't behave or feel the same depending on the application. On M-DCT, the notion D, M/S and +/- is different than on standard BMW autoboxes.

In the video, "he" never pushed the lever back "into the center" as you stated because he didn't need to. On the M-DCT, the lever always remains in the center position (except in reverse). Tap to the right to engage/toggle between either Drive (automatic) or Sequential (manual) modes. Tap to the left to engage neutral. Tap up to downshift and tap down to upshift. To engage reverse, simply move the lever left and up (a bit like you would in a manual transmission). To get back in forward gear, you simply move the lever down out of reverse into neutral and tap it to the right to engage drive/sequential mode. Going into and out of reverse has no impact on any of the drivelogic settings (comfort/sport/sport+).

BTW, you shouldn't be so arrogant ...

[///ADMAN]

Oh, man...you told me. I guess I'll figure it out when I get my ///M4

[CanAutM3]

Originally Posted by ///ADMAN

I guess I'll figure it out when I get my ///M4

That will be easy .

I find DCT more intuitive on ///M cars than it was on 335is I test drove.