My manual says to only put it in N if you are stationary for "prolonged periods".
D1 or Neutral at traffic lights?
- Thread starter fatbaldboy
- Start date
Spaldingski
Scottish Borders
fatbaldboy
Member
Pretty sure I need to do this to.zxy said:
matsmith749
Active member
Slushbox auto - brake is needed or it will move off. It's always trying to move off. You need to stop it.
When stopped at the lights with the brake pedal depressed - the auto box is in 1st gear, trying to go. Releasing the brake lets it creep.
DCT - brake tells the gearbox you are slowing. It shifts down the gears. Whn it senses you are about to stop it puts itself in neutral. The trigger for that is speed =0 + brake pedal depressed.
When stopped at the lights with the brake pedal depressed, it is in neutral, it is not trying to go. DCT shifts to first when you release the brake, and then creeps.
Similar end effect to the driver - very different in reality.
When stopped at the lights with the brake pedal depressed - the auto box is in 1st gear, trying to go. Releasing the brake lets it creep.
DCT - brake tells the gearbox you are slowing. It shifts down the gears. Whn it senses you are about to stop it puts itself in neutral. The trigger for that is speed =0 + brake pedal depressed.
When stopped at the lights with the brake pedal depressed, it is in neutral, it is not trying to go. DCT shifts to first when you release the brake, and then creeps.
Similar end effect to the driver - very different in reality.
Doing this on a sketchy touch screen. This afternnon I tested the above theories. ( Especially the elegant theory by B21 which seemed to make too much sense especially for a German car. I listened for the shifts, watched the tachometer, and always felt the brakes drag and creep. I tried but there is no shift to neutral on my 35I. However the Dct clutches are wet unlike a clutch with a manual trans. So the oil is designed with cooling properties. The wear on the clutches is evidently acceptable for short periods of time. Like the manual recommends, shift into neutral if there is a long wait (and your brake leg gets tired)
zxy said:
I did say ‘de facto neutral’….ie clutch plates fully disengaged …that’s the case for the DCT…
As you stated wet clutches fully opened are not going to cause any damage..
The ZF8HP in the version used in the E89 uses ‘standstill decoupling’ which is not a real neutral but a reduction to about 20% of the torque that would normally be transmitted when sat in drive with the foot brake applied..
Apparently the 20% is applied to allow for a smooth take off…if it was fully decoupled it would result in a jerk on move off..
So to clarify it’s not a shift into a true neutral in both cases..it’s a pseudo neutral state that’s different from simply being in ‘drive’ state
Don’t sit stationary with your foot on the brake at traffic lights, especially at night, I absolutely hate being directly behind someone stopped with their foot on the brake dazzling me, ffs, don’t be a lazy tw4t use your handbrake 
It’s almost as bad as rear intensity lights on when it’s raining
Modern cars with automatic hold/handbrake are great, you just have to remember not to rev the engine at a traffic light race :lol:
It’s almost as bad as rear intensity lights on when it’s raining
Modern cars with automatic hold/handbrake are great, you just have to remember not to rev the engine at a traffic light race :lol:
matsmith749
Active member
Sorry - I absolutely NEVER use the electronic parking brake unless I am parking up & leaving the vehicle.
Since the days of the physical 'pull it up' lever, that's always been tha case. At least true for me & I reckon 95% of the other drivers of automatics or DCT engine cars.
If you are struggling to cope with brake lights at traffic lights, you are gonna need to look inwards for a solution.
Since the days of the physical 'pull it up' lever, that's always been tha case. At least true for me & I reckon 95% of the other drivers of automatics or DCT engine cars.
If you are struggling to cope with brake lights at traffic lights, you are gonna need to look inwards for a solution.
I had a Jag S-Type which was one of the first cars with an e-brake and I made a point of never using it as they were prone to failing expensively!
Some people do, one per pedal. Never struck me as a particularly useful thing to do and likely to cause problems if they then leap into a manual.
I knew someone who did drive like this. Watching him do a 47 point turn to drive forward into a parking space in a multi-story car park instead of just reversing in in one go convinced me that people who did this probably shouldn't be allowed to drive.
I knew someone who did drive like this. Watching him do a 47 point turn to drive forward into a parking space in a multi-story car park instead of just reversing in in one go convinced me that people who did this probably shouldn't be allowed to drive.
sars said:Don’t sit stationary with your foot on the brake at traffic lights, especially at night, I absolutely hate being directly behind someone stopped with their foot on the brake dazzling me, ffs, don’t be a lazy tw4t use your handbrake
It’s almost as bad as rear intensity lights on when it’s raining
Modern cars with automatic hold/handbrake are great, you just have to remember not to rev the engine at a traffic light race :lol:
I agree wholeheartedly about both the brake lights when stationary for prolonged periods and the unwarranted use of fog lights. The switch for both front and rear fog lights should be directly connected to a 30mph speed limiter - I doubt many people would ever use the fog lights again!
My other pet hate is people who drive at night using only daytime running lights not realising that they are almost invisible from behind on an unlit road.
Literally WTF am I looking at? That's either an April Fool or the ultimate solution-looking-for-a-problem.