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stevo
Member Since: 25 Apr 2006
Location: north queensland
Posts: 107
  
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Hi Guys,
can anyone tell me whether my D3 Sept 2005 SE, has a centre diff lock. as a billboard installer, i attemped to climb a 4 foot embankment in Rock Climb mode only to find that as the front wheels reached the top and moved forward from the edge the rear wheels just spun. I took a charge at the embankment and a susequent distruction of my tow hook cover to get it up there. perhaps i was in the wrong mode for this.
stephen Disco 4 Sept 09
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 30th May 2006 7:59 am |
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stevo
Member Since: 25 Apr 2006
Location: north queensland
Posts: 107
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Yes but this isn't this talking about the rear diif lock. I thought that the disco had a automatic centre diff lock Disco 4 Sept 09
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| 30th May 2006 8:29 am |
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Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
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It does have a centre diff lock that locks up almost straight away in Rock crawl. Obviously this only equalises power between front and rear axels. The rear locker is optional, I'm not sure if you hace the 4x4 info screen (I presume not) but this shows you the diff lock operating. DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
DS3 TDV6 HSE- Silver with Alpaca (new one) Gone
D4 HSE Lux - Montalcino Red Gone
Porsche Cayenne V8 Diesel S
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| 30th May 2006 8:39 am |
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stevo
Member Since: 25 Apr 2006
Location: north queensland
Posts: 107
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Thanks for that...yes the SE doesn't have the screen but i will test the rock crawl and see if anything lights up on the dash. Disco 4 Sept 09
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| 30th May 2006 8:43 am |
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PCH
Member Since: 12 Jan 2005
Location: Anywhere but work
Posts: 812
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If you don't have the nav screen then you won't see any lights or indicators appearing on the dash for centre or rear diff lock(optional) engaging.
You have to trust they are working.
Chris 2011 Discovery 4 (MY12) SDV6 HSE with General Grabber AT's, Traxide Aux Battery system, custom rear drawers and Autosafe half height cargo barrier
Gone - 2005 Discovery 3 TDV6 HSE
ARB Bull Bar, Warn 9.5XP Winch, IPF D/Lights, Cooper STT's, LR Raised Air Intake, Traxide aux battery system, custom drawers and half height Autosafe cargo barrier, Mitchell Bros 4x4 tow hitch
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| 30th May 2006 8:51 am |
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stevo
Member Since: 25 Apr 2006
Location: north queensland
Posts: 107
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Thanks Chris,
bye the way , are Your Coopers 18 " ?
Stephen Disco 4 Sept 09
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| 30th May 2006 8:55 am |
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Smarticus
Member Since: 01 Jan 2005
Location: Northumberland
Posts: 655
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Stevo, yes there is a centre diff and combined with ETC (electronic traction control) should should have done the job for you. When both front tyres loose all traction the rear wheels would receive the power and push you over. It sounds as if the slope caused your rear wheels to have no grip at the crucial time though. And it also sounds as if you found the missing ingredient - a bit more momentum - to clear the lip. Others might suggest turning off the electronic trickery for a minute to see whether some old fashioned tyre scrabberling may have doe the job (but I would be too worried about the risk of mechanical failure to try that). Disco 4 TDV6HSE
Defender 200TDi CSW
RR Evoque
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| 30th May 2006 9:01 am |
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simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
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Not sure why your afraid of mechanical failure if you turn off DSC. This will have no effect on TR, ETC, ABS, HDC etc etc.
Mud and Ruts mode is more than adequate for most terrains. Rock crawl is definitely the wrong mode to be climbing banks in. For one it reduces throttle response in order to smooth out your using the go pedal - thus allowing more control over obstacles.
Also locks your diffs.
Turning off DSC will avoid the system reducing power if the wheels start to slip and it 'thinks' your going to slide. Usually just when you need the power too.
On the LRE courses DSC is turned off to do as you say - use old fashioned tyre scrabbling to assist your climb.
You need to determine whether you need to have DSC on depending on what the ground is like and if you think you need power available all the time. Practice.
In mud and ruts the centre diff will be half closed to allow instant locking should the system 'think' it requires it.
The best thing you could do is find some rough terrain, as varied as possible, and try each TR mode and feel the differences.
Tyres of course will make a big difference when the ground is slippery.
The bank your were climbing probably would have been a piece of cake in General, Mud & Ruts or Sand mode. All these modes either retain or increase throttle response.
hope this helps
-s
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| 30th May 2006 9:44 am |
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Slimer
Site Moderator
Member Since: 06 Jan 2005
Location: Last Exit to Nowhere
Posts: 16295
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Don't forget when you turn DSC off it isn't really off just much less sensitive so you can push a lot harder before it cuts in. It is possible to get the DSC to cut in when you've turned it off  I don't recommend trying it though unless you're wearing brown trousers  The End
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| 30th May 2006 10:01 am |
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