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Robbie's Guide To ZF8 Auto Transmission Oil Change
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Bodsy
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Member Since: 06 Nov 2006
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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

I have 20L of mannol 8 Speed oil for sale cheap if anyone wants some.

https://www.disco3.co.uk/forum/sale-mannol...65897.html
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Clock/ SNOTM /3Flash / 4x4Info /BT Update /Service Reset/Error Codes / Gearbox Reset
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Post #188054817th Nov 2017 3:13 pm
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Davethegeo
 


Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 665

Scotland 2012 Discovery 4 3.0 SDV6 XS Auto Baltic BlueDiscovery 4

I'm half way through changing the oil on my 8spd gearbox now.

Draining the oil was easy, and no need for special tools. Plenty of room underneath when in offroad height with axle stands.

I left it to dribble out over night, and filled it in the morning. I managed to pump in just over 4 litres which surprised me. After exercising the gears as in Robbie's instructions, I managed to get some more in. It then took an hour and a half to get up to 69 degrees at idle speed. No more dribbles coming out....until.. I exercised the gears again once up to temperature and revved it to 2000rpm for 30s then about a litre of oil came out again! Hmmm. Not sure what is going on there, but the net result is that I put in about 3.5 litres.

Now waiting for it to cool to 30 degrees. Might take a while as it's a hot day..

Then recheck level, filler plug back in, reset adaptations and enjoy my slightly happier gearbox.
 D1 300Tdi - gone
D2 Td5 ES (Alive remapped...mmm) - sadly gone
D4 SDV6 XS - still shiny

 
 
Post #19609347th Jul 2018 10:07 am
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Gareth
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Lux Auto Fuji WhiteDiscovery 4

I left mine to cool overnight before the final check and got another half litre in.
  
Post #19609427th Jul 2018 10:35 am
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Davethegeo
 


Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 665

Scotland 2012 Discovery 4 3.0 SDV6 XS Auto Baltic BlueDiscovery 4

All done. It took eight hours to cool to 30C. Next time I'll miss out the gear selection once the oil is up to temperature (Step 14 in Robbie's guide), and just go straight to checking the level once cool. When the oil is hot and the engine running, a fair bit of now dirty oil spewed out. Once cool that same volume had to go back in.
Seems smoother on the road but not a lot of difference. However, the oil that came out was not totally black and still had a greenish tinge and smelt the same as the new stuff so probably had a bit of life left in it.
Overall a fairly easy job. Thanks, Robbie for the guide.
 D1 300Tdi - gone
D2 Td5 ES (Alive remapped...mmm) - sadly gone
D4 SDV6 XS - still shiny

 
 
Post #19610687th Jul 2018 6:53 pm
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Bazza.
 


Member Since: 06 Jul 2018
Location: Essex
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United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Zambezi SilverDiscovery 4

I've just bought my D4 HP8 and want to do the gear fluid. It's done 93k with no record of any fluid change. Is it a good idea to change the sump & filter now or do one fluid change first and then a second a bit later with the sump pan?
 Disco 4 2012  
Post #196458917th Jul 2018 7:29 pm
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Gareth
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Lux Auto Fuji WhiteDiscovery 4

I’m not sure if the sump and filter is necessary on the HP8. Just the oil change.
  
Post #196459217th Jul 2018 7:38 pm
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Bazza.
 


Member Since: 06 Jul 2018
Location: Essex
Posts: 330

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Zambezi SilverDiscovery 4

It's not knowing the cars work history that has me wanting to change the filter, if it's done a lot of towing or off road then I'm expecting more sludge. I've seen a couple of ZF video's now where there's a fair amount of sludge in the sump around the magnets. Better out than in I think.
 Disco 4 2012  
Post #196470818th Jul 2018 5:36 am
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jamez79
 


Member Since: 03 Sep 2018
Location: Staffordshire
Posts: 371

United Kingdom 2012 Discovery 4 3.0 SDV6 XS Auto Indus SilverDiscovery 4

Loking to do an oil change myself. Been looking at alternatives to the zf oil due to cost...

Is this ok?

Says it's suitable as an alternative for ZF Lifeguard 8, but wanted to check with you lot first.

https://www.millersoils-shop.co.uk/millermatic-atf-8sp

Cheers

Jim
   
Post #202062920th Jan 2019 8:32 pm
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Tripe
 


Member Since: 28 Jun 2015
Location: Tasmania
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Australia 2007 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Can this atf oil change be Done at the radiator like zf6? As per Filo method?
  
Post #203063821st Feb 2019 8:55 am
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Robbie
 


Member Since: 05 Feb 2006
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

No.
 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 #203067921st Feb 2019 10:38 am
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Tripe
 


Member Since: 28 Jun 2015
Location: Tasmania
Posts: 284

Australia 2007 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

What’s the difference between the zf6 and zf8?
  
Post #203068021st Feb 2019 10:42 am
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Robbie
 


Member Since: 05 Feb 2006
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

First post on this thread will give you the overview.
 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 #203068321st Feb 2019 10:46 am
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Tripe
 


Member Since: 28 Jun 2015
Location: Tasmania
Posts: 284

Australia 2007 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Does the atf oil still go to the radiator for cooling? Or is it a different?
  
Post #203089621st Feb 2019 8:26 pm
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Gareth
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Member Since: 07 Dec 2004
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Lux Auto Fuji WhiteDiscovery 4

It does, but there is a thermostatic valve involved. Until the oil temp gets very hot, it doesn’t open to send the oil through the cooler.
  
Post #203089721st Feb 2019 8:30 pm
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jamez79
 


Member Since: 03 Sep 2018
Location: Staffordshire
Posts: 371

United Kingdom 2012 Discovery 4 3.0 SDV6 XS Auto Indus SilverDiscovery 4

Anyone know the part number for the drain plug on the zf8?Just done my gearbox following Robbie's guide. Thumbs Up


Going to give it a couple of weeks and change again. Next time I'd like to swap the plug too.

Cheers

Jim
   
Post #203576010th Mar 2019 9:42 pm
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