Haldex AWD System?

[tms217]

Does anyone know any article on the Haldex AWD system on the SHO? I have read some comments that the system is normally set at 55% front/45% rear but that during hard acceleration it can transfer as much as 100% to the rear. Also, that the system has the ability to not only move torque from front to rear but also side to side. Does anyone have any detailed articles on this system?

 

[roland]

i was under the impression it can only send 40% to the rear wheels, if it could send 100% to the rear I think this car would suffer from oversteer not understeer (and a few accusations of very slight torque steer)

 

[nothingtoseehere]

Volvo's R series with Haldex was 90/10 front/rear with up to 50/50 when needed IIRC

 

[PonySHO]

I checked the Haldex website and found this about the side-to-side question:

"The eLSD (electronic Limited Slip Differential) is an option to the Haldex Gen IV and makes it possible to transfer torque between the left and the right rear wheels. This enhances the traction and the stability of the vehicle."

I just perused through the info and didn't see any numbers. Here's a link to the site to get more info. http://www.haldex.com/en/North-America/Applications-Products/Product-categories/AWD/ I guess the question is, does the SHO have the Gen IV system?

 

[OldSalt]

If my memory serves me right the SHO is Gen IV Haldex but without eLSD option, and is set with 55/45 as it's front to rear power ratio. Furthermore I thought I read somewhere that the SHO Haldex system could shift 100% of the power to the front or rear as needed. Thats my cut...

 

[bill murray]

I am in no way competent to comment on the Haldex system as I didn't even know my car had it. I was only generally aware that there was some way of splitting the proportion between front and rear wheel drive according to "conditions".

Reason for my post is that in the last two weeks or so I have had the occasion to punch the throttle pretty hard when making a turn, mainly to turn left at a light ahead of oncoming traffic. Nothing dangerous, just needed a car length or two of extra room.

I experienced some really strong torque steer when doing this, reminding me of the SAAB turbos I used to drive but with the SAAB's it would occur in a straight line especially from a standing/rolling start at low speeds.

When punching the throttle from a standing start with the wheels straight ahead in the Taurus, I have never had this experience.

Anyone have any comments on this??

Bill

 

[typhoon5000]

From Ford's media page about the Flex (shares same platform and I believe the same AWD system as the SHO):

Flex’s available intelligent all-wheel-drive system is tuned to provide confident driving in all weather conditions. Intelligent AWD uses an active, on-demand electronic center coupler to allocate a precise amount of torque from front to rear – up to 100 percent to either axle. The system also can anticipate wheel slip before it happens.

-April 4, 2007

http://media.ford.com/article_display.cfm?article_id=25820

And Edmund's Inside Line reports in their First drive of the 2010 SHO:

But here the 2010 Ford Taurus SHO gains an advantage from the dowdy Ford Five Hundred on which its chassis is based, and that's because the new SHO has all-wheel drive. The Haldex system is nominally set to a torque split of 55 percent front/45 percent rear, but it can shift 100 percent to the front or rear wheels as necessary.

-June 16th 2009

http://www.insideline.com/ford/taurus/2010/2010-ford-taurus-sho-first-drive.html

I thought Ford had dropped Haldex for their own system that was very similar to Haldexes, but I could be wrong. Just Google "2010 Taurus SHO Haldex" and you'll get plenty of results, including a discussion about this same topic on the GM Insider, just referring to the new Taurus PI.
http://www.gminsidenews.com/forums/f57/3-5-awd-3-5-ecoboost-taurus-based-2012-ford-police-interceptor-89962/index4.html

 

[PonySHO]

The quote I posted before said the eLSD was an option on the Gen IV Haldex system. So it looks like Ford didn't opt for it and therefore there is only front/rear torque transfer and no side-to-side... at least that's my take on this discussion.

 

[typhoon5000]

The quote I posted before said the eLSD was an option on the Gen IV Haldex system. So it looks like Ford didn't opt for it and therefore there is only front/rear torque transfer and no side-to-side... at least that's my take on this discussion.

From what I've read and seen, I think they are open diffs too.

Edit: I can confirm the new SHO does NOT use a Haldex AWD system. It is a Ford in house design, assembled by ZF and JTEKT.