4000 cs differential locks malfuctions

[LL - NY]

RESPONSES IN CAPS TO DIFFERENTIATE FROM HUW.

On 11/30/08, Huw Powell <audi at humanspeakers.com> wrote:
>
>
>
> JONATHAN WOLOVICH wrote:
> > Huw
> >
> > Thank you for your answer.
> > I always read your comments.
> > The quattro tip was very good. I assumed (wrong)the system was 2wd 4wd
> > and 4 low.
>
> > How do I know if  lock differentials are locked or not.
>
>
> If the rear is locked, the rear tires should "scrub" in a tight turn on
> dry pavement.  Also, if you jack up the rear end and turn one tire, the
> other will turn in the same direction (corrections anyone?).
>
> If the center diff is locked as well, you won't be able to turn the rear
> wheels with both in the air.
>
> YOU ARE CORRECT





> I notice in the control panel  a light green came on when, I manually
> > shift the real differential divise.
> > How Should the light be? On or off.
>
> ON MEANS LOCKED. DON'T RECALL WHAT ACTUATES IT, BUT MY RECOLLECTION SAYS
> IT'S ACTUALLY FEEDBACK FROM THE SERVO. AT LEAST THAT APPLIED TO MY 1984 WITH
> THE PULL KNOB. DON'T KNOW IF THE SAME APPLIES TO THE 85-6 WITH THE ROTARY
> POSITION SWITCH. MY 84 HAD A STICKY REAR DIFF SERVO WHICH WOULDN'T LIGHT
> UNTIL THE REAR ACTUALLY LOCKED (TOOK TIME OR HAND ASSISTANCE UNTIL I CLEANED
> IT).
>



That I don't know/remember, although I *think* the light indicates a
> "locked" situation - whether it gets feedback from the servo or just
> records the switch position, again, I don't know.
>
>