[s-cars] Video RS5 and urQ running side by side

[Taka Mizutani]

Is that just for the rear diff or also the center diff?

I hate the Haldex systems that are FWD until the wheels slip- unpredictable
handling characteristics, esp. in snow. I guess I could blame DSTC for that
as well, as they are all interconnected.

Taka


On Mon, Mar 8, 2010 at 11:59 PM, <qshipq at aol.com> wrote:

>
>  I suspect the S5 "Crown gear differential" is actually Haldex XWD version
> 5.  Since VAG just completed a $4.5B deal with Haldex last October to
> develop XWD v5 for 2012 platforms, I suspect the S5 is as good an initial
> test bed as any. The video QW put up is incomplete to 'how' it's controlled,
> but the claims of it's dynamics certainly dictate all these performance
> enhancers are tied to the CAN Bus of the Haldex v4 with "improvements" for
> the yet to be introduced v5 (Haldex claims it can control EDL functions with
> the XWD platform).
>
> The difference from XWD v4 appears to be that v5 can allocate engine torque
> without any slippage, and has that capability at any engine applied torque
> (unlike the limted preload torque of the v4 in the Saab 9-3 of 59lb/ft).  I
> also suspect it's pretty easy to add a locking switch to lock the center
> diff.
>
>
> My .02
>
> S "torsen boy" J
>