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jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8026

2011 Defender 110 Puma 2.4 USW Stornoway Grey

as MSE said ^^^

its an option and ABS and TC come together. std on XS.

TC works across axle only (although the newer Bosch system being worked on works on all 4 wheels)

its also good a breaking rear calipers - TC working when reversing!!!

its works at all speeds once you have gone over the 8kph turn on speed! (hence light on dash for ABS goes off at 8kph) Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

3rd Sep 2009 8:19pm

AndrewS

Member Since: 10 Apr 2007
Location: Hereford
Posts: 3707

2013 Defender 130 Puma 2.2 SW Rimini Red

alantd wrote:

AndrewS wrote:
Simples You drive into mud/snow,

Surely the TC only kicks in when the wheels are spinning at different speeds, not when they're generally spinning.

This is correct.

alantd wrote:

The TC isn't going to brake both wheels at the same time is it?

It will apply the brakes to the wheel that is turning faster.

alantd wrote:

I assumed it didn't monitor differences between front and back.

It doesn't

I don't think the diffs are up to the forces involved thats all

When driving off road at some point you will find that you will have to apply some gas. Lets say going through a snowdrift. At some point one of the tyres will loose traction the TC will apply the brakes to this spinning wheel, the drive force will be transfered through the diff to the other wheel that has grip, this wheel will then push the car forward

Now can you imagine the forces that are involved in the above scenario You have a spinning wheel that has just been stopped, the opposite wheel with grip plus the load of the car on it is being forced to turn. The poor diff is under a lot of stress. And that was just for that split second. This will happen 20 or 50 times a second (not sure of the exact pulse rate) The diff need to be very strong to endure this punishment and when diffs are failing on vehicles that don't leave the tarmac the off road vehicle diffs don't stand a chance.

The fuses for TC/ABS are under the drivers seat they can be pulled and the vehicle will drive fine. We had to do this in Morocco when the front axle exploded on the Utility.

When the diffs fail on Chelsea I will get them replaced under warranty remove them and get Mr Ashcroft to supply me with decent diffs and drive shafts all round.

Sonic demonstrating wheel spin

4th Sep 2009 9:33am

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8026

AndrewS wrote:

Now can you imagine the forces that are involved in the above scenario You have a spinning wheel that has just been stopped, the opposite wheel with grip plus the load of the car on it is being forced to turn. The poor diff is under a lot of stress. And that was just for that split second. This will happen 20 or 50 times a second (not sure of the exact pulse rate) The diff need to be very strong to endure this punishment and when diffs are failing on vehicles that don't leave the tarmac the off road vehicle diffs don't stand a chance.

i agree with all your above post bar the fact that the spinning wheel with no grip will not necessarily be brought to a stop (it may be but not always) the TC just has to make the spinning wheel the harder option so the power goes the other way. how much breaking and how frequent TC works depends on level of grip of the other tyre. that of course doesn't get over the fact that the forces involved are massive

i totally agree that the diffs are useless. My first one went soon after an off roading session with a fair amount of TC working. since then the replacement has been fine until it did some more 'serious' off road - by serious i mean enough to induce alot of TC activity and now the 'new' rear diff is starting to moan a little. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

4th Sep 2009 12:24pm

double cab happy

Member Since: 01 Jun 2009
Location: merseyside
Posts: 573

2007 Defender 110 Puma 2.4 DCPU Java Black

i had a chat to a land rover experience instructar about my lack of T/C and he said that when it kicks in it can (and by can he ment not always) put the brakes on harder than you would be able to do with as much force on the pedal, this can create a shock wave traveling through the drive train, i take from this that the old land rover saying of as slow as possable but as fast as nessasery still applys with the puma's. no T/C hasn't stop'd me yet and i'm still on general grabbers!

4th Sep 2009 1:56pm

mse

Member Since: 06 Apr 2008
Location: UK
Posts: 5035

2016 Defender 110 Puma 2.2 XS CSW Scotia Grey

The worry with the diffs is the failure outside of warranty - or when you havent got access to a dealer Mike

4th Sep 2009 3:50pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8026

double cab happy wrote:
i had a chat to a land rover experience instructar

now thats something to listen too meant nicely! Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

4th Sep 2009 7:42pm

AndrewS

Member Since: 10 Apr 2007
Location: Hereford
Posts: 3707

4th Sep 2009 7:44pm

markalpha

Member Since: 23 Apr 2008
Location: Downham Market
Posts: 690

2013 Defender 110 Puma 2.2 XS CSW Santorini Black

Are the 09/10 diffs any stronger than the first puma diffs or is it a case of after market diffs to cure the problem! Andrew now the utility has gone what are you using for serious off road work.

6th Sep 2009 8:56pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8026

mine is a 09MY and rear diff went, they are all same as, there was a batch of faulty diffs mind which contributed to the problem. Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

8th Sep 2009 10:37am

AndrewS

Member Since: 10 Apr 2007
Location: Hereford
Posts: 3707

markalpha wrote:
Andrew now the utility has gone what are you using for serious off road work.

Chelsea

and The Red Pearl

9th Sep 2009 8:44pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8026

markalpha wrote:
Are the 09/10 diffs any stronger than the first puma diffs or is it a case of after market diffs to cure the problem! Andrew now the utility has gone what are you using for serious off road work.

having already replied didn't they change all rear diffs (may of been front) to 4pin ones on the 09 MY? Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

10th Sep 2009 12:36pm

Keith5

Member Since: 27 May 2016
Location: Scotland
Posts: 352

2012 Defender 110 Puma 2.2 USW Santorini Black

I'm not sure if resurrecting this thread is the right way to go or not so apologies if there's already an answer on the forum I haven't found.

I've recently had a half day on the Experience course at Dunkeld and in discussion with the Instructor they suggested that up to 2012 TC was an option on the Defender. I have a MY2012 110 USW XS, other than finding a scenario where TC should kick in is there any way to check if I have this or not?

This thread suggests that I should have it, however the most recent posts are 2009 so I have no idea if something has changed since then.

Thanks

Keith Keith

4th Oct 2016 8:16pm

Jeebs

Member Since: 23 Oct 2015
Location: North West
Posts: 197

1995 Defender 90 300 Tdi HT Barolo Black

I believe if you turn the key to the position before start (as you would to warm the glow plugs) your ABS and TC light should stay on for a few moments and then go out.

If your Defender isn't fitted with either, the lights won't ignite. Give the manual a read it may shed a bit more light than I can

4th Oct 2016 8:29pm

CDN38

Member Since: 14 Nov 2014
Location: Courtenay, BC
Posts: 729

Not 100% on this, (but probably 99%) but so far as I know, but in order to have Traction Control, you must have ABS. With ABS, you will have 2 brake lines to your rear differential, non ABS will only have 1. it's a Landrover thing...

my renovation thread:
http://www.defender2.net/forum/topic40792.html

4th Oct 2016 9:07pm

agentmulder

Member Since: 16 Apr 2016
Location: Outer Space
Posts: 1324

Pretty simple to check without having to skid.

Look at the swivel housing top pin, if you have TC/ABS there will be a cable running from it back towards the vehicle front. Don't get it confused with the diff breather though.

Not having it, I'm not sure where it is located on the rear?? Solved the bowel problem, working on the consonants...

4th Oct 2016 9:30pm

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