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DISCO4.COM > Technical (D3)

Fluid Leak between gearbox and engine
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Slipalong
 


Member Since: 03 Nov 2018
Location: Sussex
Posts: 29

United Kingdom 2006 Discovery 3 TDV6 SE Auto Bonatti GreyDiscovery 3
Fluid Leak between gearbox and engine

Hi got a slight leak between the gearbox and the engine. The oils looks a light gold colour. Im also getting a slight wobble of the rev counter when accelerating moderate too hard. Its just a slight movement of the rev counter maybe 10 - 20 rpm. Car is driving ok and gear change seem fine.

My question:

Could it be a leaking TC?

Is the ATF in the gearbox the same fluid as in the TC or is it different stuff?

Was thinking of checking the level in the Gearbox and maybe topping it up if necessary.

Thanks,

Ian.  
Post #199987412th Nov 2018 3:07 pm
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Sea Raider
 


Member Since: 01 Nov 2016
Location: None
Posts: 4450

There's an electrical transmission plug on the gearbox that's known to leak.
Other than that I've no idea about it.
I had it replaced whilst I had Disco in getting a gearbox service and the company mentioned it so I had it changed at the same time.  
Post #199987712th Nov 2018 3:11 pm
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Slipalong
 


Member Since: 03 Nov 2018
Location: Sussex
Posts: 29

United Kingdom 2006 Discovery 3 TDV6 SE Auto Bonatti GreyDiscovery 3

Yes I have heard that these can be a problem, but I think they are on the output end of the gearbox, so would not leak into the bell housing.  
Post #199988812th Nov 2018 4:03 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10368

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Yes ATF and TC are the same fluid pumped around  
Post #199996612th Nov 2018 7:17 pm
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1783

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

The overflow from the gearbox when its been overfilled runs to the bell housing and drips from the hole at the bottom. The correct fluid is a light honey colour so that may be it. Check the level in the gearbox but prior to undoing the filler plug make sure engine is running at idle (saves a mess Embarassed ) as this makes sure all bits are full.  
Post #200007713th Nov 2018 4:41 am
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df_tom
 


Member Since: 10 Mar 2017
Location: Stuttgart
Posts: 127

Germany 

That leak seems to be the patented LR chassis crossmember anti corrosion system, invented by Maurice WIlkes himself and introduced to the market with Series I 88".


I wonder how much effort went into designing the device that creates a precisely metered leakage at the ZF gearbox factory.  
Post #200008213th Nov 2018 6:57 am
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72790

Ukraine 

df_tom wrote:
I wonder how much effort went into designing the device that creates a precisely metered leakage at the ZF gearbox factory.


Lots, it’s part of the LR design brief. Laughing Laughing Whistle   
Post #200008313th Nov 2018 7:07 am
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Slipalong
 


Member Since: 03 Nov 2018
Location: Sussex
Posts: 29

United Kingdom 2006 Discovery 3 TDV6 SE Auto Bonatti GreyDiscovery 3

Thanks Guy's, sounds like I'm not going to have to fork out 1,000s for a rebuild and have a perfectly preserver cross member Laughing Rolling with laughter  
Post #200012413th Nov 2018 10:40 am
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DiscoJeffster
 


Member Since: 27 Feb 2016
Location: Perth
Posts: 204

Australia 2010 Discovery 4 3.0 TDV6 HSE Auto Nara BronzeDiscovery 4

Be thankful yours is a conformist. My D4 refuses to leak a drop and is subsequently rusting to pieces 😂  
Post #200014313th Nov 2018 12:39 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10368

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I thought the vented upto the engine bay (behind the RH head)

to prevent water going into the gearbox when in water.  
Post #200015013th Nov 2018 1:14 pm
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