Hi to all, I'm new here.

Does anyone know which generation Haldex coupling is in the Octavia 4x4, A5, year of product 2005, 2006 model.

I searched on Google for a long time and sent by mail in the Skoda, but received no response.

Thanks

Marko

I think there is an application page @ Haldex.com

The current Octavia 4x4 & Scout, Yeti and Superb 4x4 all use e Haldex 4 system. Older Octavias (I believe pre-facelift) used the Haldex 2 system.

I'm not too sure what version the Golf 4Motion, Audi A3 Allroad and SEAT use but it is probably the same as the Octavia. The Audi A4 and above uses a Torsen system instead of Haldex.

On a 2005/2006 model it will be a gen 2 Haldex.

Thanks to all for answers.

Few more questions....

Is Haldex 2nd generation good?

Does Haldex II works like in picture? My link

Is this true?

Haldex clutch, which automatically determines the facility depending on the drift of the individual wheels.

On the vehicle's permanent all-wheel and 4 to 48% of the front left, front right 48%, 2% back left and back right 2%.

Haldex clutch able to transfer up to 90% of rear-wheel drive, 45% rear left and 45% rear right, while the front remains 10%, 5% front lef and 5% front left.

It is also possible to transfer up to 85% drive to each wheel while the other three remain at 5% each.

If you happen to have both right wheels on ice, the drive switches to the left wheels, 45% each.

Haldex and ESP work together perfectly?

Thank you,

Marko

Sorry,

picture: http://i39.tinypic.com/10h2epz.gif

Thanks to all for answers.

Few more questions....

Is Haldex 2nd generation good?

Does Haldex II works like in picture? My link

Is this true?

Haldex clutch, which automatically determines the facility depending on the drift of the individual wheels.

On the vehicle's permanent all-wheel and 4 to 48% of the front left, front right 48%, 2% back left and back right 2%.

Haldex clutch able to transfer up to 90% of rear-wheel drive, 45% rear left and 45% rear right, while the front remains 10%, 5% front lef and 5% front left.

It is also possible to transfer up to 85% drive to each wheel while the other three remain at 5% each.

If you happen to have both right wheels on ice, the drive switches to the left wheels, 45% each.

Haldex and ESP work together perfectly?

Thank you,

Marko

Sounds about right, although I would assume its the ESP that sorts out the front wheel split as the Haldex is mounted where you would normally find the rear diff.

To be honest in particularly slippery conditions such as snow I tend to turn the ESP off as the TC tends to interfere with the Haldex IMO.

Gen2 Haldex is ok, only difference between 2 and 4 is that the gen2 reacts to wheels spinning, moving power around as appropriate (Reactive) whereas the gen 4 is proactive and moves power arround in anticipation of wheel slippage I.e. when the accelerator is pressed hard.

Gen3 Haldex was only ever fitted to landrover freelanders iirc and gen 2 was pre fl and gen4 is fl I think (please don't quote me on this) gen5 is due out this year so may end up in mk3 Octy Scout. Some interesting info here http://en.m.wikipedia.org/wiki/Haldex_Traction

Edited 1 January, 201214 yr by Anddenton

Sounds about right, although I would assume its the ESP that sorts out the front wheel split as the Haldex is mounted where you would normally find the rear diff.

To be honest in particularly slippery conditions such as snow I tend to turn the ESP off as the TC tends to interfere with the Haldex IMO.

Gen2 Haldex is ok, only difference between 2 and 4 is that the gen2 reacts to wheels spinning, moving power around as appropriate (Reactive) whereas the gen 4 is proactive and moves power arround in anticipation of wheel slippage I.e. when the accelerator is pressed hard.

Gen3 Haldex was only ever fitted to landrover freelanders iirc and gen 2 was pre fl and gen4 is fl I think (please don't quote me on this) gen5 is due out this year so may end up in mk3 Octy Scout. Some interesting info here http://en.m.wikipedia.org/wiki/Haldex_Traction

Thanks for answers!

Your ESP is all the time OFF when is snow on the road, and road is straight?

Do you turn on ESP in condition like here on video - http://www.youtube.com/watch?v=Zy8jocfu0bg - ?

Thank you,

Marko

Yes in those conditions shown in the video (and always in deep lying snow) I would tend to leave the ESP off to allow some slippage in the wheels and therefore the Haldex to work its magic. Otherwise the TC tends to fool the Haldex into thinking its got grip where it hasn't.

I think that Haldex with ESP (and winter tyres) is a good combination for driving on snow.

I keep the ESP on when driving on snow. ESP is a safety feature and therefor I prefer to keep it activated. I have winter tyres that give very good traction on snow, I have never experienced problems with ESP and/or the Haldex 2 in snow. Personally I would only turn off ESP driving on very loose snow (as mentioned in the owner manual).

The video clearly shows that 4x4 with ESP is not a good alternative for wintertyres. Uphill the 4x4 is underperforming compared to a 2-wheel drive with winter tyres and no ESP. And downhill all cars are equal, so the 4x4 with Summer tyres might get into trouble.

I have managed to get uphill of very steep snowy/icy hills without chains and no warning lights of the ESP or TCS.

Last year I was on a deserted snowy road (flat with fresh snow), I hit the pedal and easily accelerated to 60 km/h and also tested a safe emergency brake.

Edited 2 January, 201214 yr by Constant

Yes in those conditions shown in the video (and always in deep lying snow) I would tend to leave the ESP off to allow some slippage in the wheels and therefore the Haldex to work its magic. Otherwise the TC tends to fool the Haldex into thinking its got grip where it hasn't.

Thanks for answer!

I will see this winter how it's work. Hope so your 4x4 Skoda Scout is good on snow.

It's verry different to drive 4x4 car even on normal conditions, it is much better.

Thank you for answer.

I will try it to do it this winter.

You have same winter tyers all winter so far?

I bought this year 2 new GoodYear UltraGrip 8 195/65 R15 91T M+S. I read tests on internet and lots of people say that is very good tyere. Looks verry good, "snowy" if you know what I mean...

And I get 2 used UltraGrip 7 and I put it on rear. Do you think I will have problems because two rear tyers are used?

Sorry to all for many questions.

Thank you,

Marko

I think that Haldex with ESP (and winter tyres) is a good combination for driving on snow.

I keep the ESP on when driving on snow. ESP is a safety feature and therefor I prefer to keep it activated. I have winter tyres that give very good traction on snow, I have never experienced problems with ESP and/or the Haldex 2 in snow. Personally I would only turn off ESP driving on very loose snow (as mentioned in the owner manual).

The video clearly shows that 4x4 with ESP is not a good alternative for wintertyres. Uphill the 4x4 is underperforming compared to a 2-wheel drive with winter tyres and no ESP. And downhill all cars are equal, so the 4x4 with Summer tyres might get into trouble.

I have managed to get uphill of very steep snowy/icy hills without chains and no warning lights of the ESP or TCS.

Last year I was on a deserted snowy road (flat with fresh snow), I hit the pedal and easily accelerated to 60 km/h and also tested a safe emergency brake.

Yes, I bought the 4 winter tyres at the same time. It is my first set of winter tyres, I used it for the last three winters. The last two winters were very snowy and I have seen very snowy conditions in Amsterdam as well as driving in the Alps. The Haldex and the winter tyres have safeguard me on many slippery conditions on snow and black ice.

For continuous use, the haldex can handle only a little margin in difference between tyres. For the exact margin (2-3 mm?) it is good to consult your dealer.

The goodyears ultragrip received top 3 test reviews for the last years by the ADAC test (German AA) in very extensive tests. But these test reflect Central European conditions focussing mostly on snow and less focus on icy conditions. I am not an expert on Nordic conditions, but as I understand in Nordic conditions tyres need to perform in icy conditions.

Aha, I think its about 2-3 mm, but I will ask dealer.

Thank you,

Marko

Yes, I bought the 4 winter tyres at the same time. It is my first set of winter tyres, I used it for the last three winters. The last two winters were very snowy and I have seen very snowy conditions in Amsterdam as well as driving in the Alps. The Haldex and the winter tyres have safeguard me on many slippery conditions on snow and black ice.

For continuous use, the haldex can handle only a little margin in difference between tyres. For the exact margin (2-3 mm?) it is good to consult your dealer.

The goodyears ultragrip received top 3 test reviews for the last years by the ADAC test (German AA) in very extensive tests. But these test reflect Central European conditions focussing mostly on snow and less focus on icy conditions. I am not an expert on Nordic conditions, but as I understand in Nordic conditions tyres need to perform in icy conditions.

Thanks for answer!

I will see this winter how it's work. Hope so your 4x4 Skoda Scout is good on snow.

It's verry different to drive 4x4 car even on normal conditions, it is much better.

To be honest my experience is from a steep hill with deep fresh snow on half worn summer tyres where it needed to spin the wheels up above what the TC would allow in order to make progress (all 4 wheels were spinning even with ESP/TC on which was just making the car go sideways slowly). This year I have winter tyres so will see how much difference they will make as soon as we have some snow.

One more thing with Haldex2, it does not work on reverse, on Haldex4 that has been possible at last.

...

Is Haldex 2nd generation good?

On the vehicle's permanent all-wheel and 4 to 48% of the front left, front right 48%, 2% back left and back right 2%.....

My 2002 Octavia 1.8T 4X4 Estate was fitted with Haldex 2 while my 2010 Octavia II 1.8TSI Estate is fitted with Haldex 4. I was sufficiently impressed with Haldex 2 during the 9+ years I owned the 2002 car to opt for another Skoda 4X4.

You mentioned Haldex 2 providing a minimum of 2% drive (ie torque) to each rear wheel. That figure applies to Haldex 4-equipped cars. In Haldex 2 cars all the torque is transmitted to the front wheels until such time as the Haldex coupling clutch plates are engaged. Put another way, the car is front wheel drive only until Haldex control module (ECU) decides what oil pressure to apply to the plates Haldex coupling clutch as a result of signals received from various sensors and switches.

There is a very good explanation of Haldex 2 operation in the link below.

http://www.billswebspace.com/HALDEX.pdf

One more thing with Haldex2, it does not work on reverse, on Haldex4 that has been possible at last.

Erm, are you sure?

I was on the understanding that my pre-facelift 2008 (August) Octavia Scout has Haldex 2, yet it can spin all four wheels in reverse.

The Haldex 2 on my 2002 Octavia 4X4 also provided torque as necessary to the rear wheels when reversing.

I'm sure i read it or saw a picture on haldex.com but now can't find it since their page looks different since they got taken over by BorgWarner, nontheless happy to know its working on Gen2 I stand corrected.

Yep the Haldex 2 on my 2008 scout definitely works in reverse too, however I think this could also have something to do with how the Haldex is controlled by the electronics on the car - I seem to remember my old 1997 Honda HRV where the abs didn't work when going backwards (As the 4x4 used the same sensors to detect wheel spin I assume the 4x4 didn't work in reverse either).

Thank you all for your answers.

Thank you very much for the PDF.

Whether the data in the PDF related to Haldex 4 or generally to the Haldex?

So, the Haldex 2 doesent have drive in the all wheels all the time?

My 4x4 (56plate) definetly works in reverse. It would pull itself off the drive in deep snow even when it was wearing its summer tyres. It was great. i never had to bother clearing the drive

So, the Haldex 2 doesent have drive in the all wheels all the time?

No, it doesn't. But it does have 4 wheel drive when it needs it.

Thanks.

No, it doesn't. But it does have 4 wheel drive when it needs it.