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Automatic gearbox in traffic
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Disco4Gatt
 


Member Since: 19 Feb 2021
Location: Oxfordshire
Posts: 10

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Ipanema SandDiscovery 4
Automatic gearbox in traffic

Hi Folks

This is going to sound like a rather dumb question, but this is my first automatic, so i am slightly at a loss as to what is the best way to work the transmission when stuck in a jam, in particular when it can be a long one.

What is best?

Stay in Drive or keep flipping between N and D?

kr
  
Post #221435128th Feb 2021 6:45 pm
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kajtzu
 


Member Since: 10 Aug 2017
Location: Helsinki
Posts: 6538

Finland 2005 Discovery 3 4.4 V8 HSE Auto Cairns BlueDiscovery 3

Dunno what’s best but here is what I do when when waiting for hamburgers at McDonald’s - I put it in park. When waiting for lights to change I’m pressing the brake and the transmission is in Drive. If you’re in a jam it sounds more like McDonald’s so you know what is do. Thumbs Up
  
Post #221436528th Feb 2021 7:38 pm
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DrRobH
 


Member Since: 10 Oct 2015
Location: Hampshire
Posts: 924

United Kingdom 

I often flick into neutral and use foot brake
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Post #221436828th Feb 2021 7:57 pm
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Lee Trinder
 


Member Since: 12 Aug 2018
Location: Henley in arden
Posts: 515

2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

It does say in the manual for the D3 not to sit in drive for extended periods, so I just pop it in neutral if I know I’m not moving for a minute or two.
  
Post #221436928th Feb 2021 7:57 pm
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galwaygreen
 


Member Since: 30 Oct 2011
Location: plymouth
Posts: 6525

United Kingdom 2016 Discovery 4 3.0 TDV6 Graphite LE Auto Loire BlueDiscovery 4

put mine in nuetral at every opportunity....just think what you would do with manual box...you wuoldnt sit with you foot on the clutch for ages it would foook the clutch
ours has knob not lever,,,so easy...............in saying that we did it in the d3 all those years ago.
  
Post #22144041st Mar 2021 12:01 am
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cobby
 


Member Since: 05 Aug 2018
Location: Oxfordshire
Posts: 226

United Kingdom 2007 Discovery 3 TDV6 GS Auto Java BlackDiscovery 3

I agree with putting it into neutral if I'm going to be sat stationary for a while with the engine running.
I guess there must be some drag caused because if you select drive and leave on tick over the car will
move quite forcibly if you take your foot off the brake. Rolling Eyes
I know all the bands in the box are running in oil but does not seem quite right to me to leave it in gear
for long periods.
Just my opinion as I have nothing to base this on.
Cobby. Thumbs Up
  
Post #22144571st Mar 2021 11:53 am
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Davethegeo
 


Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 876

Scotland 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

I still act as though I'm driving a manual - handbrake and neutral if I'm going to be sat for more than 20s.
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Post #22144581st Mar 2021 11:57 am
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10464

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Quote:
I still act as though I'm driving a manual - handbrake and neutral if I'm going to be sat for more than 20s.
Thumbs Up Thumbs Up

Absolutely, I don't use the foot-brake more than necessary, particularly at night, so as not to subject those drivers behind me to dazzle.

I get quite Censored off when cars in front of me use their foot brakes for ages, particularly when dark.

NJSS
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Post #22144601st Mar 2021 12:24 pm
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RogB
 


Member Since: 15 Jun 2018
Location: Mansfield
Posts: 1637

United Kingdom 

IIRC the D4 ZF 8 Speed goes into a sort of standby neutral if you stop and leave your foot on the brake pedal, so no need to keep going from D to N as the gearbox ECU does it for you. As soon as you take your foot off the brake it re-engages D and away you go

Happy to be corrected on this from more mechanical folk than me.

And totally agree ref the blinding brake lights annoyance so on that basis alone its worth a flick to neutral and EPB on.
 2011 D4 XS 305 MY12 - gone but not forgotten  
Post #22144801st Mar 2021 1:32 pm
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Canburne
 


Member Since: 15 Jan 2013
Location: Devon
Posts: 2027

Ukraine 2015 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

Rog you are absolutely correct as far as that is what the manual says for the D4 however as NJSS points out it is not very kind on the driver behind with all your brakes lights on!!
 .
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Post #22146251st Mar 2021 10:48 pm
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cobby
 


Member Since: 05 Aug 2018
Location: Oxfordshire
Posts: 226

United Kingdom 2007 Discovery 3 TDV6 GS Auto Java BlackDiscovery 3

If what RogB says is true about the D4 going into a standby neutral why is it if you have your foot on the brake and shift from neutral to drive the car bumps the transmission and attempts to move forward?
Well it does on the ones I've tried, maybe someone else can confirm or deny that?
As for leaving your foot on the brakes at night and blinding the driver behind, the same goes for leaving your rear fog lights on when someone is following you at night, they can obviously see you so turn them off.
  
Post #22146722nd Mar 2021 9:52 am
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Canburne
 


Member Since: 15 Jan 2013
Location: Devon
Posts: 2027

Ukraine 2015 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

That is a bit strong - Roger is correct!! It goes into a sort of standby neutral so as not to damage the gearbox/TC but if you then actually change it into neutral that is a completely different matter.
 .
"the inherent vice of capitalism is the unequal sharing of blessings....the inherent vice of socialism is the equal sharing of miseries" Winston Churchill

2016 D4 Landmark Club Waitomo ...or is it Club Tempest????
2015 D4 HSE Aintree Green 
 
Post #22146782nd Mar 2021 10:30 am
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RogB
 


Member Since: 15 Jun 2018
Location: Mansfield
Posts: 1637

United Kingdom 

when you stop forward motion, foot firmly on brake pedal, wait maybe 5-10 seconds, you should see/feel/hear a very slight change in revs, and this is the ''standby neutral'' engaging
when you begin to release your foot off the brake pedal you should then feel the slight rev change again and the car tries to start moving forward, which it will do once you fully release the brake pedal.

Its not an instantaneous change, as the ECU has to work out if your stopping for a very brief moment or if your stopping for a longer period in traffic.
 2011 D4 XS 305 MY12 - gone but not forgotten  
Post #22146842nd Mar 2021 10:53 am
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dgarside
 


Member Since: 17 Jan 2010
Location: Holmfirth
Posts: 732

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

NJSS wrote:
Quote:
I still act as though I'm driving a manual - handbrake and neutral if I'm going to be sat for more than 20s.
Thumbs Up Thumbs Up

Absolutely, I don't use the foot-brake more than necessary, particularly at night, so as not to subject those drivers behind me to dazzle.

I get quite Censored off when cars in front of me use their foot brakes for ages, particularly when dark.

NJSS


Another one to agree with above, handbrake on into neutral, and generally (unless on a hill) manually take off handbrake before driving away (and I know you don't need to). In the 3+ years never had a problem with EPB and when last stripped was clean/working well.
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Post #22147082nd Mar 2021 12:31 pm
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Disco4Gatt
 


Member Since: 19 Feb 2021
Location: Oxfordshire
Posts: 10

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Ipanema SandDiscovery 4

Thanks for the replies folks.

I like the night time consideration. I guess being on the cautious end trying to determine least wear and tear. i did read on quorum around automatic boxes in general that in neutral, the discs are not engaged and so you get slippage = wear and tear, while in D this does not happen.

I tried reaching out to ZF on twitter who kind of gave me 'whatever works for you' answer... so much for transmission engineer's perspective.. maybe it doesn't matter... just obsessing with how to take best care of me lady.
  
Post #22147482nd Mar 2021 3:17 pm
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