[s-cars] EDL fails (but my new 22's worked great!)

[LL - NY]

By theory, it should stay active to higher speeds and 
work on the front axle, but in practice, I had two 
wheels spinning, on opposite diagonal corners. ABS 
pump stopped making noises when the wheels went
into spin mode, bogging the car with lighter throttle openings,
slipped clutch and higher gears didn't help. Since I DID hear
the ABS pump function part of the time, I'd have to say that
EDL was functioning, it just doesn't seem as effective as
a locked diff when trying to dig out of a bogged situation (BTDT
now with both systems. I like the older better). 

LL - NY


On Wed, 2 Mar 2005 15:53:57 -0500, Toborg Michael (AC-SM/ESC5)
<Michael.Toborg at us.bosch.com> wrote:
> The EDL should stay active at higher vehicle speeds than what the locker
> opens up at. Can it build pressure at the front axle also? I don't know
> what system is on there.
> -Mike
> 
> -----Original Message-----
> From: Keith Maddock [mailto:keith.maddock at gmail.com]
> Sent: Wednesday, March 02, 2005 3:48 PM
> To: Theodore Chen
> Cc: LL - NY; Toborg Michael (AC-SM/ESC5); s-car-list at audifans.com
> Subject: Re: [s-cars] EDL fails (but my new 22's worked great!)
> 
> Theodore Chen <tedebearp at yahoo.com> wrote:
> >
> > --- LL - NY <larrycleung at gmail.com> wrote:
> >
> (snip)
> > > That said, I still agree with
> > > Taka, I think comparatively, EDL was the cheap way out of providing
> > > us with a switch and the corresponding wiring, for a locking rear
> > > diff.
> >
> > EDL also removes the locker.  EDL is just ABS-based traction control,
> > isn't it?
> 
> Yes.
> 
> In short, it uses the ABS hydraulic unit (with two extra
> valves/solenoids added) to generate pressure (using the ABS motor) to
> brake the faster spinning rear wheel until that rear wheel matches (or
> comes close to) the other rear wheel.
> 
> It's a relatively small cost compared to a locker rear and associated
> actuation for said locker. (and normally less warranty risk too)
> 
> Cheers,
> Keith
> 
>