No here's the the original question:

...................and I believe it was fully answered.

...................and I believe it was fully answered.

In depth, I thought.

It was, and most useful information too, I must say - thanks a lot for it. I didn't mean to cast any aspertions on the explanations, but Gregs two experiences did worry me a tad. From what has been said, the Yeti systems ought to do everything needed - and that's a great relief.

Edited 16 November, 201015 yr by roguebrit

Greg570 you might want to look at the video posted in the first post of this thread:

http://briskoda.net/forums/topic/159259-4x4-systems-tested/

That Passat has the same Haldex system as the Yeti and that test neatly shows all the situations described above with various wheels losing traction as well as Agerbundsen's comment re the Honda system.

I would like to thank you all for the aswers. Just one more question regarding the video above...Why passat didn't move when only one wheel had traction? Not enough gas?

I would like to thank you all for the aswers. Just one more question regarding the video above...Why passat didn't move when only one wheel had traction? Not enough gas?

The Subaru voice over man on the video seemed to suggest it was due to the Passat having a non-symetrical engine! Hmmm... not so sure about that! Also I suspect if the Passat had a Haldex 4 instead of the Haldex 2 it was ftted with, it would have driven up the slope with just one wheel having traction. It might be a Haldex 2 failing - I'm not sure. But I'm sure the clever SMOC-people will answer you shortly!

The Subaru voice over man on the video seemed to suggest it was due to the Passat having a non-symetrical engine! Hmmm... not so sure about that! Also I suspect if the Passat had a Haldex 4 instead of the Haldex 2 it was ftted with, it would have driven up the slope with just one wheel having traction. It might be a Haldex 2 failing - I'm not sure. But I'm sure the clever SMOC-people will answer you shortly!

As far as I know the only advantage haldex 4 has over haldex 1-3 is in the speed of transfering power to the rear. The haldex 4 has an electrical pump that closes the coupling while haldex 1-3 need wheel spin to generate pressure that closes the coupling. Also...haldex 4 is not equal to haldex xwd used in opel insignia. Xwd has another coupling on the rear axle (between the two rear wheels) while haldex 4 does not.

I think he eased off the power.

Here is a video of the Haldex working, courtesy of Roguebrit in another thread. Notice that when not enough traction all four wheels turn.