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Auto Gearbox Question
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Av_Dave
 


Member Since: 13 Jul 2016
Location: Stourbridge, West Midlands
Posts: 28

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
Auto Gearbox Question

Morning all, I've tried doing quite a bit of research into his but can't seem to find any info about it, So was hoping someone on here will be able to shed some light on this.

I've noticed on two discovery 3's now when driving from cold as soon as I lift off the throttle it appears to drop into neutral, this then stops as soon as the temperature guage needle passes the blue section this stops happening.

I'm guessing there's a reason for this.

Thanks

Dave.
 

Last edited by Av_Dave on 9th Jan 2017 8:53 am. Edited 1 time in total 
Post #17602459th Jan 2017 8:16 am
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Yes there is but usually a cheap fix by lowering the metal plate below the gear lever and greasing the linkage.

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Post #17602569th Jan 2017 8:46 am
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Av_Dave
 


Member Since: 13 Jul 2016
Location: Stourbridge, West Midlands
Posts: 28

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thanks for swift reply Robbie, it's going into gear fine it's just when I come off the throttle when driving but once warm it doesn't do this almost as if as it's designed to.

Thanks
  
Post #17602599th Jan 2017 8:52 am
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

No, not as designed so fix as above to avoid the 'lost-all-drive-whilst-big-truck-was-coming-at-me' moment as it will only get worse.

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 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #17602609th Jan 2017 8:55 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
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Posts: 72740

Ukraine 

I read this as the normal drop in revs when cold when foot lifted off throttle?? Not gummed up linkage. Confused
   
Post #17602689th Jan 2017 9:10 am
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tompack
 


Member Since: 26 Apr 2016
Location: West Midlands
Posts: 4

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Yes I think that's what Dave is saying.
  
Post #17602709th Jan 2017 9:16 am
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Av_Dave
 


Member Since: 13 Jul 2016
Location: Stourbridge, West Midlands
Posts: 28

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Yes that's exactly it DSL, I was just interested as to why it does when cold?

Thanks Thumbs Up
  
Post #17602749th Jan 2017 9:20 am
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Ahh, so not dropping into neutral then.
 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #17602959th Jan 2017 10:15 am
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JustaGeek
 


Member Since: 25 Apr 2015
Location: Round the Twist
Posts: 79

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

I believe its part of the engine warm up stratergy;

In normal running, with the torque convertor locked up, when you lift the throttle the engine is kept turning by the momentum of the vehicle, so the ECU cuts of the injectors to save fuel.

However during warm up, to get the engine up to temp as quickly as possible, it does the opposite, the torque converter is prevented from locking up, so that when you lift the throttle, instead of cutting off the injectors, the engine is allowed to idle instead.

(At least thats what I think happens)
  
Post #17602989th Jan 2017 10:21 am
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Av_Dave
 


Member Since: 13 Jul 2016
Location: Stourbridge, West Midlands
Posts: 28

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thanks for the reply, sounds intresting and makes a lot of sense, clever stuff really, it was bugging me not knowing the reason for this happening. Thumbs Up
  
Post #17603089th Jan 2017 10:36 am
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Av_Dave
 


Member Since: 13 Jul 2016
Location: Stourbridge, West Midlands
Posts: 28

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Robbie wrote:
Ahh, so not dropping into neutral then.


Sorry Robbie I should of explained it better really, thanks for the help though, and it's a good tip to keep the linkage greased I'm going to do mine now as well. Thumbs Up
  
Post #17603509th Jan 2017 11:45 am
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tompack
 


Member Since: 26 Apr 2016
Location: West Midlands
Posts: 4

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Ahh interesting. I did wonder about this as well. Good to know! Thumbs Up
  
Post #17603519th Jan 2017 11:45 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10335

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

that's reassuring
  
Post #17603759th Jan 2017 12:25 pm
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