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Another Front LCA post - B6 Armoured vs standard bush?
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Russellg
 


Member Since: 24 Oct 2017
Location: Aberdeenshire
Posts: 48

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Auto Mariana BlackDiscovery 4
Another Front LCA post - B6 Armoured vs standard bush?

Sorry guys if this is covered elsewhere, if it is I’ve missed it - I’ve trawled every D3 and D4 post about replacing/upgrading the front lower control bushes and/or arms, but I haven't found any direct comparison about lower arm ball joint sizes.

As I understand it, the best replacement option on the D3/4 is to upgrade to RRS arms.

(It's also a given to avoid poor quality aftermarket stuff and I take on board the general advice to stay away from poly bushes on the LCA, but that's not the issue here).

With that in mind, I also understand that the later D4's already have the 35mm ball joint (not sure what size the early ones are or when the change was made, if any (i.e. was it just later D3's/all D4's or just later D4's etc).

In any case, I am I correct in thinking that seeing as the D4 B6 armoured LCA part number is the as the 2005-2009 RRS TDV8 that the same arms (D4 B6/RRS TDV8) are a straight bolt on to a late D4? Mine is in a MY16 D4 in the GA780000 - GA80000 range.

Specifically, I am looking to install: -

B6 Arms : - LR029303 and LR029305 (V) AA000001 Onwards

in lieu of:

Standard Arms : - LR073367 and LR073369 (V) EA184498 - GA816748

As far as I am aware it’s a straight swap based on members fitting RRS arms, but I don’t want to order up the arms and find out they don’t fit due to a ball joint issue etc.

I plan to buy Genuine LR or more likely an OEM arm, probably from AF or Rimmer Bros? Should clarify not a 'Britpart OEM' arm though.

As I say, I know this topic has been covered to death, but any further guidance on the B6/RRS arms and the 35mm ball joint is appreciated!
  
Post #22712176th Jan 2022 9:57 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20855

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

303/305 are RRS arms

Don't bother though, fit Meyle HD. Superior to anything else available Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #22712597th Jan 2022 6:44 am
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nigethecat
 


Member Since: 11 Sep 2016
Location: Marnoch
Posts: 4252

Ukraine 2016 Discovery 4 3.0 SDV6 Commercial XS Auto Corris GreyDiscovery 4

https://www.advancedfactors.co.uk/kit680hd...6312-p.asp

Use code AF4LRP and get 5% forum discount…

Or pop down to Dundee and get Mike to do them for you Laughing
 I want to see the sweets before I get into your windowless van... I'm not stupid!

Corris Grey D4 Commercial SE 2016
Zermatt Sliver 2007 D3 SE manual (gone)
Indus Silver D4 HSE 2015 (gone)
Bonatti Grey D3 HSE 2006 (gone)
White D3 S (LHD) 2007 (gone)
Firenze Red D4 HSE 2014 (gone)
Black RRS 3.6TDV8 2008 (gone)
Rusty Green Defender 110 1997 (gone)
Black FL2 HSE 2013 (gone) 
 
Post #22712627th Jan 2022 7:46 am
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Russellg
 


Member Since: 24 Oct 2017
Location: Aberdeenshire
Posts: 48

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Auto Mariana BlackDiscovery 4

Thanks Gents,

I did come accross a previous post where Mikely advised he fits taht in the firsty instance, - unless the customer specifically wants somthing cheaper.

My only concern is that accross teh forums i've read more than one post also saying that the longevity of the soild bush comes at the expense of more vibration through the steering wheel?

I'm happy to fit these myself, i'd even do my own tracking if I could (done many time on other cars with string and axle but that not the best way for a decent reliable 4 wheel alignment on the D4!
  
Post #22712827th Jan 2022 9:43 am
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Russellg
 


Member Since: 24 Oct 2017
Location: Aberdeenshire
Posts: 48

United Kingdom 2015 Discovery 4 3.0 SDV6 SE Auto Mariana BlackDiscovery 4

Sorry forgot to shout out and say thanks @nigethecat for highlighting the AF forum discount too!


I think i'm gonna go with the recomended arm by @Disco_Mikey, however I wiill put some effort into the originals off withought cutting (destroying) so I can refurb them, pop some new bushes in over time and put them on the shelf as sapres for the future.

The origianls have lasted 87k so properly installed and torqued I should get at last that out of the Meyle HD's...
  
Post #22712917th Jan 2022 10:14 am
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nigethecat
 


Member Since: 11 Sep 2016
Location: Marnoch
Posts: 4252

Ukraine 2016 Discovery 4 3.0 SDV6 Commercial XS Auto Corris GreyDiscovery 4

No probs, always happy to help out a neighbour Very Happy

Get a sticker from the forum shop and we can wave as we pass Laughing
 I want to see the sweets before I get into your windowless van... I'm not stupid!

Corris Grey D4 Commercial SE 2016
Zermatt Sliver 2007 D3 SE manual (gone)
Indus Silver D4 HSE 2015 (gone)
Bonatti Grey D3 HSE 2006 (gone)
White D3 S (LHD) 2007 (gone)
Firenze Red D4 HSE 2014 (gone)
Black RRS 3.6TDV8 2008 (gone)
Rusty Green Defender 110 1997 (gone)
Black FL2 HSE 2013 (gone) 
 
Post #22712927th Jan 2022 10:19 am
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eightfoot
 


Member Since: 12 Apr 2015
Location: sunny essex
Posts: 810

United Kingdom 2005 Discovery 3 TDV6 S Auto Bonatti GreyDiscovery 3

Disco_Mikey wrote:
303/305 are RRS arms

Don't bother though, fit Meyle HD. Superior to anything else available Thumbs Up




fitted these to mine before christmas very happy car feels nice and tight again with no vibrations,2013 with 63000mls on clock and they where shot front wheel moved back and forth about an inch when undoing the wheel nuts

picked a pair up from -bay with bolts for £220 delivered the bolts where cheap firstline but had new genuine bolts waiting for the job to be done
 please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4 
 
Post #22712937th Jan 2022 10:41 am
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20855

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Russellg wrote:


My only concern is that accross teh forums i've read more than one post also saying that the longevity of the soild bush comes at the expense of more vibration through the steering wheel?


We've fitted (literally!) hundreds of sets of these, and never had a complaint about ride quality or harshness etc

Also, never had to replace a set of Meyle arms after fitting, in over 5 years Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #22714177th Jan 2022 9:04 pm
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Sylvester19
 


Member Since: 17 Jul 2020
Location: Central Scotland
Posts: 132

Ukraine 2016 Discovery 4 3.0 TDV6 Landmark LE Auto Indus SilverDiscovery 4

Had mine replaced at 5yrs & 24k Rolling Eyes with Meyle HD, thank you warranty direct. Felt a lot tighter, maybe some slight harshnes for 50 miles or so, fine now, no complaints, going to put meyle HD on polo.
  
Post #22714327th Jan 2022 10:56 pm
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