[urq] Center diff lock

[Maurits Jonkergouw]

Thanks Robert and Keith,

I would love to check the valve(s) but I can't find it. There are 2 identical (to me) 
blue/black valves on the firwall, but ETKA says there should be a different valve for the 
diff lock switch: (046 905 291 A) but in the drawing doesn't show where it is in relation 
to other parts.

At least 1 blue/black valve is correctly located in ETKA (433 862 117), but the other one 
looks exactly the same whle it should be different, if it's the correct location of 
course....

Could you please help me locate the correct valve please?

Thanks again.

Regards,
Maurits

1986 quattro GV (rebuilt)

----- Original Message ----- 
From: "Keith Lloyd" <spotatashleys at hotmail.com>
To: "Maurits Jonkergouw" <urquattro at moregraphics.nl>; <urq at audifans.com>
Sent: Sunday, May 23, 2010 4:35 PM
Subject: Re: [urq] Center diff lock


Mauritz
I too would look at the one way valves. To test just disconnect and stop-up
the pipes and re-test.
HTH
Regards
Keith


----- Original Message ----- 
From: "Robert A Dupree" <robert.a.dupree at jpmchase.com>
To: <urquattro at moregraphics.nl>; <urq at audifans.com>
Sent: Sunday, May 23, 2010 2:18 PM
Subject: Re: [urq] Center diff lock


My suspicion is your check valves are failing or failed. Although usually that comes with 
unlocking on boostm


----- Original Message ----- 
From: "Maurits Jonkergouw" <urquattro at moregraphics.nl>
To: <urq at audifans.com>
Sent: Sunday, May 23, 2010 9:58 AM
Subject: [urq] Center diff lock


> Lately my center diff lock is getting engaged on agressive accelerations,
> mainly above 80 mph. The diff indicator light goes on briefly and you can
> feel and hear this very loud thumping noise from the back end, very scary.
>
> This happened many times now and I'm afraid I ruined something.
>
> It's like there is too much vacuum and this actuates the switch or
> something.
>
> It's the 'later' style diff lock system with one rotary switch and two
> lights.
>
> Any thouhts?
>
> Regards,
> Maurits Jonkergouw
> (mobile)