snafu
Member Since: 10 Sep 2007
Location: ambivere
Posts: 25
  
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Hi, i'm italian so sorry me for my poor english...
Last friday i bought a brand new discovery 3 2.7Diesel HSE my08 (automatic gears, satellite navigator plus, etc.. etc..) but i still asking me "do i need to rear differential blockable?". Here in Italy it's an option and i didn't put it cause my land rover shop said that the central one electronically blockable and the ETC control is enought.
First of all you need to know that i'll never do offroad but in the winter time i'll go every weekends to the italian mountains to go snowboard, so 100% i'll need to go up and down to mountains roads full of snow.
I need to understand how is working the ETC and the 3 differentials?
I know that the central differential is electronically and automatic blocked from the car and that the rear differential is not blockable (it's an option).
With the central differential i'm ok if one o both wheels of the same axle (for example the front axle) are sleeping.
But if are sleeping two wheels of a different axle (for example the right front wheel and the left rear wheel) am i stocked? In this case, in a regular 4x4, i need to look the rear differential or the front differential but i can't in the discovery 3.
So in this case how is working the ETC in the discovery 3? I'm really stocked or the ETC will help me and keep traction on my car?
Can you help me to have no doubts?
Thanks in advance.
Last edited by snafu on 10th Sep 2007 12:37 pm. Edited 1 time in total
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 10th Sep 2007 12:14 pm |
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Mr Andrew
Member Since: 28 May 2007
Location: Sydney, Australia
Posts: 128
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Great post, and welcome! A very funny post. Anyway, the real answer to your question is easy - you will be fine. In snow conditions, simply choose the snow option with Terrain Response, you will be amazed where it will go. If you go really loco, put some chains on and the car will be unstoppable. Enyjoy, and rest assured that you will go further than any other vehicles except for the ones with tracks and skis up front!
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| 10th Sep 2007 12:22 pm |
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snafu
Member Since: 10 Sep 2007
Location: ambivere
Posts: 25
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Thanks a lot for your answer  ... everybody teel me "don't worry, you'll go anywhere"
But i'd like to know how is working all the electronic/mechanic system.
Ok, i'll set the terrain control on "snow program" so what?!? How the electronic will run in this program?!?
P.s.: the post it's funny cause it's full of mistakes?!? 
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| 10th Sep 2007 12:32 pm |
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Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
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Your English is better than my Italian! The rear diff cars are more capable than non euipped ones, but most people will never test their cars to that level. I've never driven in deep snow, but certainly in slippery conditions the standard D3 is very very capable. I'm sure some of the owners that have driven in deep snow will tell you their thoughts. 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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| 10th Sep 2007 12:55 pm |
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DiscoStu
Member Since: 09 Apr 2006
Location: London
Posts: 11412
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snafu wrote:P.s.: the post it's funny cause it's full of mistakes?!?
Well, we can understand it I only know 5 words in Italian 
Welcome to the site 
The D3 will use the anti-lock brakes (locking the spinning wheel) as well as diff locks to help you get unstuck Disco 5 HSE Lux
https://www.youtube.com/watch?v=peyiqaJrmMU
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| 10th Sep 2007 12:56 pm |
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snafu
Member Since: 10 Sep 2007
Location: ambivere
Posts: 25
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thanks to everybody...
it's sounds great to speak with people from others country... this is the power of internet.
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| 10th Sep 2007 1:04 pm |
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ArcFro
Member Since: 30 Dec 2005
Location: Helsinki area
Posts: 74
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snafu,
Unfortanately I'm not able to give you technical explenation how diff's and DCS are working together. However, I've made a bit of driving in snow up here in Finland and I can assure to you that D3 is VERY capable in snow too.
But, once you get stucked you are (literally) in deep trouble. It took me one hour to dig it out once snow was very tightly packed under car's body. Things were even worse since I don't have air suspension (coils). On that day I made promise to myself that next D3 will be with terrain response...
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| 10th Sep 2007 2:40 pm |
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snafu
Member Since: 10 Sep 2007
Location: ambivere
Posts: 25
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Mine has terrain respons and pneumatic suspension... it will be delivererd in january 2008 and it's a long time.
I'm really happy and excite wainting my new "toy"...
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| 10th Sep 2007 3:01 pm |
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ArcFro
Member Since: 30 Dec 2005
Location: Helsinki area
Posts: 74
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So I figured out from your profile. This enables you to get in even deeper trouble 
I've also once driven D3 with snow chains. It did move boundaries of snow driving beyond my imagination 
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| 10th Sep 2007 3:08 pm |
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snafu
Member Since: 10 Sep 2007
Location: ambivere
Posts: 25
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I can't wait until january... but i have too 
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| 10th Sep 2007 3:20 pm |
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heine
Member Since: 07 Feb 2007
Location: Midrand
Posts: 4054
 
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I was told by the instructor at Land Rover Experience that the rear diff will not lock when you select sand and gravel/snow mode . This is because it can promote under steer in these conditions . Not sure how true this is , but you might pay for something that will never be activated in any case
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| 10th Sep 2007 3:24 pm |
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stapldm
Member Since: 11 Sep 2006
Location: Swine Town
Posts: 2330
 
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Bear in mind that the diffs on the D3 do not actually ever lock - they are progressive and can vary the amount of power delivered to their outputs/wheels.
If the diff locked 100%, the electronics would never be able to detect that the condition that required the locking had ended - for this reason it never makes it to 100%. For the same reason, ABS never permanently locks a wheel : if it stops rotating it releases it to try again.
The different terrain modes adjust the starting percent of loading of the diffs to provide the optimum result for the chosen conditions.
Simply put, if you don't have the electronic rear diff, the car uses the brakes at each individual corner to mimic/copy what the active diff would have done, so the active diff is a nice to have but not necessary feature unless you're really trying to get stuck.
In my experience, the car is much more capable than I am off road, even without the rear active diff
Just one more thing - somewhere there's another post that recommends different settings when snow gets deep; but I can't find it at the moment - can anyone else find it?
Snafu, welcome to the site, and believe me your English is a lot better thans some Brits I've met  Dr. Ian Malcolm:
"Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should."
Transgenic tomato anyone?
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| 10th Sep 2007 9:19 pm |
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snafu
Member Since: 10 Sep 2007
Location: ambivere
Posts: 25
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Thanks a lot for you help... i really think that i don't need the rear differential blockable.
The only BIG problem right now is that i must wait for 4 months... the dealer was able to deliver me the car at the end of november or beginning of december but i ask him to matricolate it in january so i don't loose one year for just one months
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| 11th Sep 2007 7:46 am |
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buzz
Member Since: 19 May 2006
Location: lancashire
Posts: 585
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snafu
enough said  Gone.......but not forgotten
06 Zermatt 7 seat auto with PDC and privacy
Club £400 V.E.D.
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| 12th Sep 2007 4:29 am |
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snafu
Member Since: 10 Sep 2007
Location: ambivere
Posts: 25
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i already saw it few days ago... i just need to understand witch kind of thermic tires i need to put on...
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| 12th Sep 2007 7:17 am |
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