Go Back   Horizons Unlimited - The HUBB > 4 wheels > 4WD Overland Tech

4WD Overland Tech GENERIC 4WD / 4 wheel TECH discussions and info that is valid for ALL brands. See brand specific forums.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

Visit Matt Savage for VIAIR compressors, Air Lift Helper Springs, Tyre Levers, Chris Scott's Books & DVDs, KC Daylighters, Allisport Intercoolers, Overland Preparation and lots more!

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 24 Jul 2007
Super Moderator
Veteran HUBBer
 
Join Date: Jun 2000
Posts: 3,156
LR electronic 'e' differential

Done the usual web trawl but can't find out what exactly land rover's electronic 'e' differential is (on the middle and back of Range Rovers and the like) and how it works.I take it there is no viscous element?

Plenty of RR reviews parrot the blurb but none actually explain - not even LR.com and it hasn't reached Wiki yet.

thanks

Chris S
__________________
This is NOT a handbook
Reply With Quote
  #2  
Old 24 Jul 2007
Gipper's Avatar
Contributing Member
Veteran HUBBer
 
Join Date: Mar 2004
Location: Banff,Canada/Poole,UK
Posts: 766
Chris

The Disco 3 and Range Rover from 07 use Torsen centre diffs (06 and before Rangies use an open Tosen diff)with a clutch plate locker operated by an electric motor -winding the plates tight against each other - so it can be unlocked or fully locked or anywhere in between - (the dash screen only shows it being either open or locked) - depending on the Terrain Response, gear, throttle, engine load, steering positions.

The rear Diff lock works with a clutch system again - operated with an electric motor - fully locked to open and anywhere in between.

they both work very well - as you climb a hill even before you get any wheel spin the CDL engages (engine/gearbox load sensors) and the rear will lock up instantly when TC kicks in - or when you engage Rock Crawl/Sand.

The transmission (ZF Auto) system is the best ive used - it will go places id struggle to put my 90.

- we asked the engineers when we first got them if there was an exposed bolt head on the Torsen/rear diff you could manually operate with a spanner to lock/unlock if the electric motor went u/s - 'nope' was the answer - and that puts me off using one in remote areas - that and the rest of the electrical gubbins and the fact that it weighs 2.7 tonnes (kerb)......1 ton heaver than a 90 hardtop.

the diffs are quite reliable - we dunked them underwater (in silt laden water)daily and had very few problems with them - unlike the handbrake...

cheers
Grif
__________________
Cheers
Grif

'09 Suzuki DR650
'00 Discovery Series 2 V8
'95 Defender 90 300 Tdi Overlander
http://gipperstravels.blogspot.com/

Last edited by Gipper; 24 Jul 2007 at 20:55.
Reply With Quote
  #3  
Old 24 Jul 2007
Super Moderator
Veteran HUBBer
 
Join Date: Jun 2000
Posts: 3,156
Thanks Grif.
So these cars dont do the brake spinning wheel Traction Control thing like TD5s.
Had a go in one the other week and I got the feeling stopping/releasing individual spinning wheels would work better than locking a whole axle on and off when going up a steep slippery slope. Better even than a fully locked-out axle diff.

Ch

Yes I've heard about the handbrake. I read one bloke got through 4 before he got a new car. The people on the TD5 day were getting a new Freelander 2 too after only 3 months. On and on it goes which explains these guys' rationale:
http://www.aroundtheworld1999.com/rovers.htm
__________________
This is NOT a handbook
Reply With Quote
  #4  
Old 25 Jul 2007
Gipper's Avatar
Contributing Member
Veteran HUBBer
 
Join Date: Mar 2004
Location: Banff,Canada/Poole,UK
Posts: 766
no problem Chris,

other way around though - they all have 4 wheel TC a la Disco Td5 - the rear locker is a cost (well worth it) option...

so when the rear diff is locked the TC wont cut in on the rear wheels (as both wheels are turning at the same speed)

The TC is 3rd generation - it cuts in within about 1/8 of a revolution of the wheel spinning - its an excellent system - super fast...

...but the rear locker gives 100% traction (as long as the tyres have grip) with no delay and less ground/tyre damage than TC.

The rear/centre locker will also release some preload on a tight turn so you dont get wind up or make the wheels 'skip'

The only drawback with TC is that you can cook the brake discs/fluid if you are on a low grip surface and the TC is working is nuts off over a long time.

a Rover with a rear locker tackles terrain better than one with just TC - it still has TC up its sleeve to to maximize traction if required (on front wheels especially or if the rear locker is u/s i suppose) and still let you steer.

later
Grif
__________________
Cheers
Grif

'09 Suzuki DR650
'00 Discovery Series 2 V8
'95 Defender 90 300 Tdi Overlander
http://gipperstravels.blogspot.com/

Last edited by Gipper; 25 Jul 2007 at 05:46.
Reply With Quote
  #5  
Old 25 Jul 2007
Super Moderator
Veteran HUBBer
 
Join Date: Jun 2000
Posts: 3,156
Very good answer and a full explanation - thanks.

Ch
__________________
This is NOT a handbook
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electronic Deer Alert Research vmanusmvmcin Other Bikes Tech 21 8 Nov 2013 21:14
Electronic Translators Bernard Equipment Reviews 5 26 Feb 2010 07:46
Interfacing electronic maps to a Pocket PC PDA Roman Navigation - Maps, Compass, GPS 1 14 Oct 2005 07:46
Security Alert - electronic banking in Internet cafes! Grant Johnson Travellers' Advisories, Safety and Security on the Road 2 19 Jul 2004 12:42
Electronic, how to..... mmaarten Travellers' questions that don't fit anywhere else 2 13 May 2004 07:26

 
 
 

NEW! HU 2015 Motorcycle Adventure Travel Calendar is now available! Get your copy now for some terrific travel inspiration!

HUGE, 11.5 x 16.5 inches, beautifully printed in Germany on top quality stock! Photos are the winning images from over 600 entries in the 9th Annual HU Photo Contest!

Horizons Unlimited 2015 Motorcycle Adventure Travel Calendar.

"The calendar is magnificent!"

"I just wanted to say how much I'm loving the new, larger calendar!"

We share the profit with the winning photographers. YOU could be in the HU Calendar too - enter here!

Next HU Eventscalendar

See all events

 

Latvia to Australia, an inspirational 5 month journey full of unexpected adventures!


Renedian Adventures

Renedian Adventures

What others say about HU...

"I just wanted to say thanks for doing this and sharing so much with the rest of us." Dave, USA

"Your website is a mecca of valuable information and the DVD series is informative, entertaining, and inspiring! The new look of the website is very impressive, updated and catchy. Thank you so very much!" Jennifer, Canada

"...Great site. Keep up the good work." Murray and Carmen, Australia

"We just finished a 7 month 22,000+ mile scouting trip from Alaska to the bottom of Chile and I can't tell you how many times we referred to your site for help. From how to adjust your valves, to where to stay in the back country of Peru. Horizons Unlimited was a key player in our success. Motorcycle enthusiasts from around the world are in debt to your services." Alaska Riders

contest pic

10th Annual HU Travellers Photo Contest is on now! This is an opportunity for YOU to show us your best photos and win prizes!

NEW! HU 2014 Adventure Travel T-shirts! are now available in several colors! Be the first kid on your block to have them! New lower prices on synths!

HU 2014 T-shirts now in!

Check out the new Gildan Performance cotton-feel t-shirt - 100% poly, feels like soft cotton!


What turns you on to motorcycle travel?


Global Rescue, WORLDwide evacuation services for EVERYONE

Global Rescue is the premier provider of medical, security and evacuation services worldwide and is the only company that will come to you, wherever you are, and evacuate you to your home hospital of choice. Additionally, Global Rescue places no restrictions on country of citizenship - all nationalities are eligible to sign-up!


New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80 G/S motorcycle.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events (22 this year!); we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, the HUBB or to receive the e-zine. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.


Books & DVDs

amazon

All the best travel books and videos listed and often reviewed on HU's famous Books page. Check it out and get great travel books from all over the world.


Motorcycle Express for shipping and insurance!

Motorcycle Express

MC Air Shipping, (uncrated) USA / Canada / Europe and other areas. Be sure to say "Horizons Unlimited" to get your $25 discount on Shipping!
Insurance - see: For foreigners traveling in US and Canada and for Americans and Canadians traveling in other countries, then mail it to MC Express and get your HU $15 discount!




All times are GMT +1. The time now is 16:36.