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Rear Diff oil - fill plug
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Lenny1974
 


Member Since: 10 May 2020
Location: Bristol
Posts: 70

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3
Rear Diff oil - fill plug

So, managed to do the main oil gearbox/filter change and front diff, but struggling to undo the rear diff fill plug. I believe its a standard 8mm hex female socket, but tool just keeps spinning in the hole. Glad i checked this first before draining the oil....

The rear end is covered in waxoyl, so good that it kept it quite rust free, but its everwhere and assume helping to keep thread locked in place.

Any tips to undo without destroying it ?
  
Post #214600114th May 2020 11:37 am
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Sidestick
 


Member Since: 22 Apr 2012
Location: Rome
Posts: 2288

Italy 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

A new plug is cheap, here is the code: FTC5431 (around 7€)

Best way of action (got a new plug and oil before do it) is to push inside the plug a torx insert bit of quite bigger size hitting on it with an hammer than unscrew it. Thumbs Up
 - Easy-Lift suspension module 4.0
- GoodWinch 9500 lb
- Full underbody protections
- Tree/Rock sidebars
- Prospeed roofrack & ladder
- Compressor guard
- Raised Air Intake
- Driving lights (2+4)
- 50 mm Waffle boards
- Altox Heater control
- Overland Rooftop Tent
- Rear seats entertainment
- Front & Rear camera
- GVIF
- Removable tow bar
- Cubby box fridge
- BFG KO2 265/65R17
- iidTool BT 
 
Post #214601714th May 2020 1:02 pm
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matgriff
 


Member Since: 16 Sep 2019
Location: Newcastle Under Lyme, Staffs
Posts: 171

United Kingdom 2005 Discovery 3 TDV6 SE Auto Cairns BlueDiscovery 3

I have the same problem with my front diff fill plug, someone chewed it up. I've tried hammering a torx bit into it and it wouldn't shift.. it's now completely rounded out, so I think my only option is to weld a bolt or similar into it Sad

Mat
 2005 TDV6 SE Auto
Cairns Blue 
 
Post #214602514th May 2020 1:29 pm
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Lenny1974
 


Member Since: 10 May 2020
Location: Bristol
Posts: 70

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

I was thinking that might be the only solution.

If I remember right, there not much room in there to get a hammer on it, but will perservere.
  
Post #214603214th May 2020 2:08 pm
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Disco3_DC
 


Member Since: 02 Mar 2018
Location: Oxfordshire
Posts: 69

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Same problem here Lenny. What did you do in the end?

I'm going to have a crack at chasing it round with a hammer and chisel, but access could make that difficult. This might be the excuse I need to buy that welding rig I've being wanting, but that'll make it a rather expensive fluid change!
  
Post #21712693rd Sep 2020 1:13 am
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Discoveringcomfort
 


Member Since: 16 Sep 2015
Location: Berkshire
Posts: 637

England 2005 Discovery 3 4.4 V8 HSE Auto Zambezi SilverDiscovery 3

I used something like this to great effect.
https://www.disco3.co.uk/gallery/albums/us...ractor.jpg
 Series 1 V8
Series 2 Hibrid V8
Discovery 3 HSE V8 
 
Post #21712993rd Sep 2020 9:44 am
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Duc750
 


Member Since: 07 Aug 2017
Location: northampton
Posts: 305

United Kingdom 2005 Discovery 3 4.4 V8 HSE Auto Java BlackDiscovery 3

only problem with those thread extractors is if they spin they polish the inside of the plug and you're left where I am with the diff needing to come out to get the plug out
 05 D3 V8 HSE, LR Passion tree bars, wildbear compressor guard, LRP switch panel, ARB rear locker + compressor, Trigger 6 shooter electrical system
12 RRS SDV6 HSE (Hers) - Gone and replaced with an I Pace - I can tell you now EV is not the future yet
Metalian Camper trailer 
 
Post #21713383rd Sep 2020 12:40 pm
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Discoveringcomfort
 


Member Since: 16 Sep 2015
Location: Berkshire
Posts: 637

England 2005 Discovery 3 4.4 V8 HSE Auto Zambezi SilverDiscovery 3

True but if you are there now you have nothing to lose. It was difficult getting the right size, too small and it bottoms out, too large it does not have enough grip to stay in.
 Series 1 V8
Series 2 Hibrid V8
Discovery 3 HSE V8 
 
Post #21715344th Sep 2020 7:31 am
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