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DISCO3.CO.UK > Maintenance & Mods (D4)

D4 low range and locking diff retrofit
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anothersilver
 


Member Since: 02 Mar 2014
Location: California
Posts: 27

United States 
D4 low range and locking diff retrofit

Is it possible to retrofit the low range and locking diff on a 2014+ lr4 without the HD package? I am able to source the mechanical parts and have them installed inexpensivly but I don’t know if the wiring harness would require changes or if the right connectors are in place already and what software modifications would be needed. I have a nanocom I could use to program.  
Post #202223625th Jan 2019 12:57 pm
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grzesiul
 


Member Since: 11 May 2008
Location: UK
Posts: 6352

Poland 2016 Discovery 4 3.0 SDV6 SE Auto Loire BlueDiscovery 4

i think all is possible
but tbh i have been in places with old base model manual bus where low range and good driving was more than enough

imho adding it is not really needed and you might not gain much but extra headache when it fails for some reason

i would do search on here as it had been mentioned before not sure with what success rate
G  
Post #202227125th Jan 2019 2:55 pm
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anothersilver
 


Member Since: 02 Mar 2014
Location: California
Posts: 27

United States 

I am not sure about rest of world but in US the non-hd 2014+ Lr4s have no low range system.  
Post #202229925th Jan 2019 4:53 pm
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grzesiul
 


Member Since: 11 May 2008
Location: UK
Posts: 6352

Poland 2016 Discovery 4 3.0 SDV6 SE Auto Loire BlueDiscovery 4

woot? what a rip off  
Post #202230325th Jan 2019 5:20 pm
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anothersilver
 


Member Since: 02 Mar 2014
Location: California
Posts: 27

United States 

Yeah it's beyond me why anyone would order without it to save $1500. Unfortunately it seems the used market here has tons of them.  
Post #202230625th Jan 2019 5:37 pm
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TigerRecovery
 


Member Since: 31 May 2017
Location: Long Stratton, Norwich, Norfolk
Posts: 901

Wales 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

It’s possible but the wiring changes will be massive as the modules are located in the engine bay and rear corner. I’m looking at it for my D4 but I’m struggling to find an ediff in the correct ratio. 1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!  
Post #202230925th Jan 2019 5:47 pm
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anothersilver
 


Member Since: 02 Mar 2014
Location: California
Posts: 27

United States 

What about the low range gearbox, is it possible to retrofit that? I think I can do without the e-diff but the low range gearbox is a must.  
Post #202231125th Jan 2019 5:48 pm
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TigerRecovery
 


Member Since: 31 May 2017
Location: Long Stratton, Norwich, Norfolk
Posts: 901

Wales 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Check to see if there is wiring and brackets in the area of the brake booster. If there are the TCCM or Transfer Case Control Module will be there. You will also need the switch pack for the low range. Does your vehicle have Terrain Response? Also check to see if there isn’t any unused wiring under the car for the two speed transfer box. You will need to update the CCF file to tell the car what’s fitted. 1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!  
Post #202232825th Jan 2019 6:22 pm
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TPLOM
 


Member Since: 28 Jul 2017
Location: Baku
Posts: 14

Azerbaijan 2014 Discovery 4 3.0 SDV6 SE Auto Fuji WhiteDiscovery 4

H gents.

I realise this is going back a bit but did you ever succeed in the low ration retrofit?  
Post #23743611st Aug 2024 6:48 pm
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anothersilver
 


Member Since: 02 Mar 2014
Location: California
Posts: 27

United States 

No I ended up getting a D3 instead of trying this.  
Post #23743621st Aug 2024 7:02 pm
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TPLOM
 


Member Since: 28 Jul 2017
Location: Baku
Posts: 14

Azerbaijan 2014 Discovery 4 3.0 SDV6 SE Auto Fuji WhiteDiscovery 4

Kind of you to answer.

Just had to sell a V8 D3. Cracking vehicle.

Will persevere with the D4 investigation and post results.  
Post #23744192nd Aug 2024 6:03 pm
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