re: 88 80Q Locking differential randomly

["Smith, Kirby A" <kirby.a.smith@lmco.com>]

"Brian Link" <bflink@ouray.cudenver.edu> wrote:

I am writing in hopes that someone can help with this weird Audi problem. 
I searched the archives and didn't find much.  My friend has a 88 80 Q and
the differential locks at random times.  Sometimes when she starts the car
other times when she stops for a light.  She says she can't unlock it with
the button rather drives up to speed to disengage it.  Usually it goes off
at 15 mph but can take as much as 30 mph to disengage.  A few months ago it
worked perfect....Any advice would be much appreciated.

Just a guess, but you might remove the rear seat bottom (2 screws in front)
and look at the controller located under it near the center.  Maybe the
connector is marginally attached, or corroded, or something.  Also, the
differential control switch is placed just where people drop conductive
drinks, food, etc.  You may need to lift the center console section and pull
the switch and clean it.

                .... Kirby   (Kirby A. Smith)
                              2 x 1988 90q
                          New Hampshire USA