HELP!!! Rear Diff Problem?

[Fred Munro]

Hi Jason;

The lever is external on the outside of the diff. It has a vacuum motor
attached to it. Maybe the vacuum hose was pulled off when you got stuck.

Fred

----- Original Message -----
From: "Jason Stone" <jason_r_stone at yahoo.com>
To: <munrof at sympatico.ca>; "Audi List" <quattro at audifans.com>
Sent: Monday, January 22, 2001 8:58 AM
Subject: RE: Re: HELP!!! Rear Diff Problem?


>
> As an aside to the msg I just sent you - it did work
> perfectly (the diff lock and the switch) up until I
> got stuck in the ditch.
>
> Maybe got jolted or broken by impact with ground?
>
> Jase
>
>
> > -----Original Message-----
> > From: munrof
> > Sent: Montag, 22. Januar 2001 14:27
> > To: jason.r.stone; quattro
> > Cc: munrof
> > Subject: Re: HELP!!! Rear Diff Problem?
> >
> >
> > Hi Jason;
> >
> > If your diff won't unlock, it is usually because the
> lock
> > lever mechanism on
> > the diff is corroded. The vacuum system can pull the
> lever to
> > lock the diff,
> > but the return spring isn't strong enough to unlock
> the diff.
> > Get under the
> > car and manually move the lever into the "unlocked"
> position.
> > Free up the
> > mechanism while you are under there.
> > The light goes out at 40 kph because the system is
> designed
> > to automatically
> > unlock the diff at that speed. If the lock lever is
> stuck,
> > the light may go
> > out (indicating the signal is sent to unlock the
> diff) but
> > the diff may stay
> > locked.
> > If you are driving at 140 kph with a locked rear
> diff you
> > will ruin the
> > diff. The car is also unstable because, as you have
> noted,
> > turning with a
> > locked rear diff causes one or both wheels to skid
> around the
> > turn - the
> > wheels want to rotate at different speeds as you
> turn but the
> > locked rear
> > diff keeps them rotating at the same speed. This is
> why your car feels
> > "nasty" when you turn.
> > Get the diff unlocked before you drive the car. The
> clicking
> > noise may be
> > due to diff damage - there's a lot of stress on a
> locked diff
> > when turning
> > at high speed.
> >
> > Good luck!
> >
> > Fred Munro
> > '94 S4  122k km
>
>
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