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Gearbox hanging on to gears
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

Is the slope front down or rear down
  
Post #211631427th Jan 2020 10:25 pm
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Trucks
 


Member Since: 30 Nov 2019
Location: south newton
Posts: 375

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Excellent point, thanks for pointing that out, the nose is facing downhill on a slight slope enough slope for the car to gently runaway if left to do so.
  
Post #211632727th Jan 2020 10:50 pm
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James W
 


Member Since: 27 Mar 2008
Location: Wirral, UK
Posts: 3067

United Kingdom 

I noticed mine felt like it was hanging on a little more, in otherwise good health and on a flushed box too. Nobody else would really notice but I did as I'm obsessive about every little notice or behaviour so I took it for diagnostics at a local ZF specialist. Seems a good run of caravan towing over the summer had retrained the box to hold the gears longer under its own adaptive programming. So no fault really. Doesn't sound like your problem but just to throw it into the mix.
 D4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - Gone to someone with less sense and more time to enjoy it Very Happy
2016 Toyota Hilux Invincible - Liberating experience 
 
Post #211634027th Jan 2020 11:17 pm
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

By being nose down may indicate that the TC is not draining so it is okay when you start off. This may mean you are low on oil or TC is worn.
  
Post #211634427th Jan 2020 11:33 pm
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Trucks
 


Member Since: 30 Nov 2019
Location: south newton
Posts: 375

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

so with luck a gearbox flush and renewed oil may solve the problem(if done correctly) which I have planned to get done when finances allow(having camebelt and oil pump changed today which I just recently read that on my year there should be no problems with the idler coming away) so could have saved a few Bob,oh well live and learn.
let's hope it doesn't need a new tc ,that would be my worst nightmare as the cost would be beyond my pocket Big Cry
thanks for input
pete
  
Post #211638528th Jan 2020 9:26 am
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

If it turns out to be the TC a tube of "Dr Tranny" will help till funds improve
  
Post #211639828th Jan 2020 10:03 am
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Trucks
 


Member Since: 30 Nov 2019
Location: south newton
Posts: 375

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Thanks for that just checked it out on the forums on here will give it a go later this week Thumbs Up
  
Post #211640728th Jan 2020 10:38 am
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aja4x4
 


Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

Just remember if your going to check the gearbox oil level the engine needs to be warm and running.
Luckily with the suspension up theres plenty of room underneath
  
Post #211658628th Jan 2020 7:36 pm
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Trucks
 


Member Since: 30 Nov 2019
Location: south newton
Posts: 375

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Ok thanks for the heads up.
I have read a bit about it on D3 forum and it seems straight forward to me.
Just a couple of points just to clarify
Do I keep the motor running whilst adding the tranny? (I believe i do )and then can I top up the gearbox if needed with the correct auto oil after shifting through the gears a couple of times.
Thanks
Pete
  
Post #211659528th Jan 2020 8:18 pm
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aja4x4
 


Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

Yes keep the engine running, check the oil level if its low add dr tranny then the oil.
If the level is correct you will have to drain a small amount out before adding anything.
  
Post #211660628th Jan 2020 9:11 pm
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Trucks
 


Member Since: 30 Nov 2019
Location: south newton
Posts: 375

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

That's great thanks for all the input will let you know how I get on.
Garage not even started cambelt yet so will have to wait till that's done.
  
Post #211662828th Jan 2020 10:28 pm
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Tripe
 


Member Since: 28 Jun 2015
Location: Tasmania
Posts: 285

Australia 2007 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

I had a mis behaving gear box

Turned out to be a faulty Engine oil temp sensor

Basically, if the engine does not get correct temp readings, it thinks it’s in -40 arctic conditions,
And it holds the gears in the higher engine rev range to get temp into the block.

Installed a new temp sensor and everything, was back to normal.
  
Post #211731231st Jan 2020 11:39 am
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Trucks
 


Member Since: 30 Nov 2019
Location: south newton
Posts: 375

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Nice one to remember Thumbs Up along with the other countless reasons for the gearbox problems.
I wonder how many poor owners have had their gearboxes classed as scrap and need replacing when there was never no need? i bet it hundreds Thumbs Up .
  
Post #211733031st Jan 2020 12:58 pm
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James W
 


Member Since: 27 Mar 2008
Location: Wirral, UK
Posts: 3067

United Kingdom 

That is a good one to remember. Do you think that would give an obvious fault code or would it be a Robbie-level diagnosis involving meters and scopes to spot it?
 D4 XS, gone, much loved, never forgotten
2018 FFRR SDV8 Autobiography - Gone to someone with less sense and more time to enjoy it Very Happy
2016 Toyota Hilux Invincible - Liberating experience 
 
Post #211733131st Jan 2020 1:06 pm
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Tripe
 


Member Since: 28 Jun 2015
Location: Tasmania
Posts: 285

Australia 2007 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

I didn’t have a code reader at the time,

The other symptom I had,


When in neutral, the car would continually rev up-to 2-3000 rpm
And drop back to 700, all by itself, it was freaky.

Then after a while, the temp would buildup in the block and I’m guessing the temp sensor body/housing and it would go back to normal.
  
Post #21175031st Feb 2020 3:01 am
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