Lmarion
Member Since: 08 Jun 2008
Location: turkey
Posts: 33
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| Rear locking differential |
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Hi,
How do I check if my discovery 3 hse(2008) has rear locking diffs or not ?
Is it optional ?
and is it necessary for snowy conditions ?
Regards
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 Wed Jun 30 2010 10:02am |
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cold_n_wet
Member Since: 05 May 2009
Location: Bergen
Posts: 784
  
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Easiest is to look at the rear diff its self.
If its fitted it looks like this
It was a option.
Not necessary for snow, but a great help if its fitted.
Glen RLD Sump plate.
RLD sill protector
RLD hidden winch.
------------------------------------
Associate of the weber club.
Member of Club sankey.
Club recovery rope.
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| Wed Jun 30 2010 10:26am |
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Alan G
Member Since: 15 Oct 2008
Location: Lanarkshire
Posts: 1161
 
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Also, if you put the 4x4 info centre up on the screen showing the wheels, chassis and two diffs, that if you select Rock Crawl this locks the diffs up.
It should show as an orange locked padlock symbol on the screen. ATB
Alan
http://www.youtube.com/user/Bonzo676767#p/u
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| Wed Jun 30 2010 12:23pm |
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theanswers
Member Since: 30 Jun 2010
Location: Sligo
Posts: 9
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What Difference would looking Diffs make to a vechicle when using it off road?
Sorry if its a stupid question.
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| Wed Jun 30 2010 12:36pm |
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Roel
Member Since: 16 Aug 2008
Location: Somewhere east off Germany
Posts: 1199
 
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You probably get to the same places without a rear axle locking diff then with one as you have traction control, but you get there with less wheelspin.
The automatic diff locks when the ECU think it is neccesary and makes sure the rear tyres have the same speed and so give the torque to the wheel that can get it to the ground. So it prevents wheelspin.
Traction control only comes in action if there is wheelspin and then uses the brakes to slow down the spinning wheel. Roel
1997 Camel Trophy Disco ex-P101JWK (traded it for a Britains 42101)
1984 90 TD5
2005 G4 Disco 3 BN55WPT
Also member of club MTR
and Club Faultmate
Interested in my 4x4 history see my website: www.mudmachine.webklik.nl
Sorry it's in Dutch and with google translator it gets funny.
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| Wed Jun 30 2010 1:12pm |
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Lmarion
Member Since: 08 Jun 2008
Location: turkey
Posts: 33
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Alan G wrote:Also, if you put the 4x4 info centre up on the screen showing the wheels, chassis and two diffs, that if you select Rock Crawl this locks the diffs up.
It should show as an orange locked padlock symbol on the screen.
so it locks both diffs up ?
so both of them will be orange/red ?
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| Wed Jun 30 2010 1:29pm |
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Lmarion
Member Since: 08 Jun 2008
Location: turkey
Posts: 33
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All right I have another question.
Do I have to be in low range for the rear diff to lock itself when necessary ?
For e.g, if I'm on grass/gravel/snow and the road is snowy/icy, and I'm not on low range mode, will the rear diff still be able to lock ?
Regards
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| Wed Jun 30 2010 1:30pm |
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Alan G
Member Since: 15 Oct 2008
Location: Lanarkshire
Posts: 1161
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Lmarion wrote:
so it locks both diffs up ?
so both of them will be orange/red ?
I believe it only does this in rock crawl mode in anticipation, in the other modes, i think it only locks if and when required. I'm one of the lesser mortals without the E Diff. 
They will show up in the orange colour when diff/s are locked. ATB
Alan
http://www.youtube.com/user/Bonzo676767#p/u
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| Wed Jun 30 2010 1:52pm |
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Stu
Member Since: 08 Feb 2009
Location: Hampshire
Posts: 2360
 
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Sticking it in rock crawl won't automatically lock the diff's up it just gets them ready so don't expect to stick it in rock crawl and see both or even one diff go orange. You realy want to get it cross axeled to see them both come on. Although if you only have the centre locking diff then you won't see the rear come on 
Best way is to take a look at it. It can be retrofitted at well if you know what you're doing (which I don't). D3 HSE MY05 Auto
Expo Rack, Club MTR, LR Spots, A Bar, Light Guards, GNVP Sump Guard, GNVP Ladder, Cup Holders, RLD A Bar brackets. Disco3Club stickers, Aux power on Mod
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| Wed Jun 30 2010 1:59pm |
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Roel
Member Since: 16 Aug 2008
Location: Somewhere east off Germany
Posts: 1199
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Yes it can lock both diffs up, but it will it independent.
Here is a picture stolen from Wiggs album
You can see both diffs locked.
Most off the time it will lock the centre diff first but I have also noticed in GGS (grass gravel snow mode) that it can lock the rear axle up while leaving the centre diff open. This happened when driving on a street with on one side ice and the other side clean. When accelerating and decellerating the rear diff locked but the centre diff stayed open. It was repeatable. I tried Roel
1997 Camel Trophy Disco ex-P101JWK (traded it for a Britains 42101)
1984 90 TD5
2005 G4 Disco 3 BN55WPT
Also member of club MTR
and Club Faultmate
Interested in my 4x4 history see my website: www.mudmachine.webklik.nl
Sorry it's in Dutch and with google translator it gets funny.
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| Wed Jun 30 2010 2:05pm |
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Dickydisco
Member Since: 03 Feb 2009
Location: Somewhere on the Trent
Posts: 435
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Stu, I thought the rear locking diff could not be retro fitted due the the electronics of the car. If it can, where is the info on it as I had a rear locking diff offered to me a while back. I didn't accept as I'm sure I read on here it couldn't be done Current:
05 HSE TDV6 silver,
Puma for SWMBO
Past: but not forgotten
2 TD5 disco2's
1 200tdi disco1
1 300tdi disco1 commercial Off roader with a rather large spec, ARB's and big travel suspension to name a few.
Pajero SWB 2.8 for off road playdays
http://www.youtube.com/watch?v=yYBx3SCl8vs check this for laughs
 | | Click image to enlarge |
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| Wed Jun 30 2010 2:09pm |
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Roel
Member Since: 16 Aug 2008
Location: Somewhere east off Germany
Posts: 1199
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It can be retrofitted and mechanical it isn't a problem, but then there are the elctronics. You need the special loom that has to be spliced in the existing loom and you need an ECU and then you have to tell the other ECU's that it is there.
So it is possible but if you can't do it yourselves, try to find a D3 that has it. Roel
1997 Camel Trophy Disco ex-P101JWK (traded it for a Britains 42101)
1984 90 TD5
2005 G4 Disco 3 BN55WPT
Also member of club MTR
and Club Faultmate
Interested in my 4x4 history see my website: www.mudmachine.webklik.nl
Sorry it's in Dutch and with google translator it gets funny.
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| Wed Jun 30 2010 2:21pm |
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Stu
Member Since: 08 Feb 2009
Location: Hampshire
Posts: 2360
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I believed that it couldn't be done until recently, but one of the members has done it (first one that I've heard of) and written up an article about it. It cost him about £600 in total ISTR. I think sourcing all the bits was probably the hardest thing (for him). He has a faultmate so was able to tell the car it had the locking diff without too much of a problem. I think the loom was probably the biggest issue (i.e. finding the bits and fitting it). D3 HSE MY05 Auto
Expo Rack, Club MTR, LR Spots, A Bar, Light Guards, GNVP Sump Guard, GNVP Ladder, Cup Holders, RLD A Bar brackets. Disco3Club stickers, Aux power on Mod
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| Wed Jun 30 2010 2:27pm |
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Spooky
Member Since: 02 Jun 2009
Location: Portsmouth, Hants
Posts: 811
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Stu wrote:... one of the members has done it (first one that I've heard of) and written up an article about it ...
Regards,
Mick
 - 'Molly' - 2005 HSE Auto
'Dixie' - 2000 D2 Td5 ES
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| Wed Jun 30 2010 2:35pm |
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Stu
Member Since: 08 Feb 2009
Location: Hampshire
Posts: 2360
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Dunno Mick, but certainly someone with waaaaay too much time on their hands! D3 HSE MY05 Auto
Expo Rack, Club MTR, LR Spots, A Bar, Light Guards, GNVP Sump Guard, GNVP Ladder, Cup Holders, RLD A Bar brackets. Disco3Club stickers, Aux power on Mod
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| Wed Jun 30 2010 2:51pm |
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