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PDK question about N position

Old Feb 20, 2016 | 03:44 PM
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PDK question about N position

Hi guys, i've tried to find out what i'm looking for but can't find an answer.
Hope someone can help me !
Well, my question is ... when i engage the N position in a PDK equipped car is the gearbox "really" in neutral position (i mean no gear engaged like a manual gearbox) or is more like a simulated neutral obtained just opening both clutches at the same time ?
Thank you in advance ...
 
Old Feb 20, 2016 | 07:28 PM
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What is it you're after?

I just started playing around with the double paddle flick putting the car into neutral. When this happens the car still knows what gear you were in because as soon as you flick one of the paddles it's right back where it was.

I think it's totally disengaged as it should be then selecting neutral with the shifter.

Just a guess.
 
Old Feb 20, 2016 | 08:59 PM
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This post reminds me of the "BMW auto complaint on you tube!!"
Check it out ...
Car runs in daytime -- in D for drive.
Doesn't go in night time - in N for night.
 

Last edited by carsnob; Feb 20, 2016 at 09:00 PM. Reason: No emoticons
Old Feb 21, 2016 | 02:55 AM
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Originally Posted by carsnob
This post reminds me of the "BMW auto complaint on you tube!!"
Check it out ...
Car runs in daytime -- in D for drive.
Doesn't go in night time - in N for night.
Do you think it's a dumb question?
Yes, could be but probably i can't explain exactly what i mean as this is not my language ... sorry for that!
Is more a technical question about internal functioning of the pdk gearbox.
In a manual gearbox, you can choose to stay in neutral in 2 ways, by putting shift lever in neutral (in this way the mainshaft of the gearbox itsself is free to rotate together with the engine but gears pinions are stopped having no gear engaged) or by pressing clutch pedal (in this way the selected gear is engaged but the mainshaft of the gearbox is disengaged as the clutch is open) i'm trying to understand if in pdk gear pinions are always engaged (i mean first and second when the car is stopped) and neutral is obtaneid only when both clutches open (standstill, not in coasting) or if with the car parked in N, clutches stay engaged with the mainshaft of the gearbox connected to the engine but with gear pinion not engaged.
I know, is not that clear but this the maximum i can get from my english !
 

Last edited by ThePunisher; Feb 21, 2016 at 09:45 AM.
Old Feb 21, 2016 | 12:04 PM
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ThePunisher -- I don't know how it works either. But it seems to me that if you put the car in N (on level pavement) and then turned it off and you were able to push the car then I would assume that no gear would be engaged. I am assuming that turning off the car would release any clutches that were being held open ....

As I said just my guess and as far as I am concerned it is a valid question.
 
Old Feb 21, 2016 | 02:50 PM
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When the car is put in neutral. No gear is engaged. It operates just as a manual transmission would behave.
 
Old Feb 22, 2016 | 10:07 AM
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Thank you for the answer.
I could probably formulate the question in a different way.
Believe me, i don't want to be boring !
When a PDK equipped car is parked and switched off and the N position is selected we can clearly move the car simply pushing it ... ok, and this is easy !
What i'm trying to understand is if we can move the car because of the 2 clutches that stay open (due to the residual pressure in the hydraulic system that can hold them open) so that the engine is "disconnected" from the gearbox or the 2 clutches automatically close as the pressure immediately falls after the shutdown and in the gearbox is "really" engaged a neutral position with the 2 shafts (inner and outer) free to rotate without involving gear ratios.
What i believe is that the first option could create many consequences, for example in case of a reduced pressure of the hydraulic circuit and a dead battery we could find ourselves in the absolute impossibility to tow the car ... and that would be very bad.
 
Old Feb 24, 2016 | 10:42 PM
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I think it's not a good idea to pull both paddle shifters to put it in N. Unlike Ferrari dual clutch transmission, PDK is not built for it, it still does it though. If you consult the manual there's no description of putting car in N by pulling both paddles. Recommend not to do this.
 
Old Feb 25, 2016 | 12:56 AM
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Originally Posted by Fester
I think it's not a good idea to pull both paddle shifters to put it in N. Unlike Ferrari dual clutch transmission, PDK is not built for it, it still does it though. If you consult the manual there's no description of putting car in N by pulling both paddles. Recommend not to do this.
Page 157:

http://www.porscheownersmanuals.com/...carrera/6/157/
 
Old Feb 25, 2016 | 08:39 AM
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Originally Posted by Fester
I think it's not a good idea to pull both paddle shifters to put it in N. Unlike Ferrari dual clutch transmission, PDK is not built for it, it still does it though. If you consult the manual there's no description of putting car in N by pulling both paddles. Recommend not to do this.
Now that you know it is in the P manual, do you still think it is not built for it? Would like to know your thinking.

The paddle neutral selection has two areas that are very important in my view. First, it removes loads of stress when drifting. Second, when the car enters a spin, it will prevent the back wheels from trying rotating against the forward gear selected, not to mention the stress on the engine. Other than these two areas, I can't think of any street application for the neutral paddle shift, except maybe impressing the kid in the WRX at a stop light!
 
Old Feb 25, 2016 | 11:55 AM
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Originally Posted by Fester
I think it's not a good idea to pull both paddle shifters to put it in N. Unlike Ferrari dual clutch transmission, PDK is not built for it, it still does it though. If you consult the manual there's no description of putting car in N by pulling both paddles. Recommend not to do this.
Hunh?
 
Old Feb 25, 2016 | 10:16 PM
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Originally Posted by 991carreradriver
Now that you know it is in the P manual, do you still think it is not built for it? Would like to know your thinking.

The paddle neutral selection has two areas that are very important in my view. First, it removes loads of stress when drifting. Second, when the car enters a spin, it will prevent the back wheels from trying rotating against the forward gear selected, not to mention the stress on the engine. Other than these two areas, I can't think of any street application for the neutral paddle shift, except maybe impressing the kid in the WRX at a stop light!
Ok ok guys, I messed up. Should've checked ... But I don't use it and won't recommend using it unless you're leasing your car or not keeping it for a long time...
 
Old Feb 25, 2016 | 11:52 PM
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I do it while driving normally just so that I can rev up the exhaust under bridges
 
Old Feb 26, 2016 | 09:26 AM
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Originally Posted by dds007
I do it while driving normally just so that I can rev up the exhaust under bridges
Yep, it's my primary curbside attention getting method.
 
Old Feb 26, 2016 | 12:26 PM
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Yeah baby!!
 

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