Re: Diffs not working

[Kneale Brownson <knotnook@traverse.com>]

There's no discernible sound in any of my 4K or 5K quattros with the
two-stage switch when the differentials are engaged or disengaged.  In all
of them, the engagement seems to require relatively straightened front
wheels and at least some forward or backward rolling.  I tried once in one
of the 4K's engaging the central differential while making a slow circle in
a parking lot, and I could only feel the tell-tale binding after I
straightened out the wheels and then resumed circling.

Kneale Brownson  2 4KCSQ's, a 5KCSTQ and the center-diff-switchless
200tq20v (I need to sell some cars)

At 11:27 PM 11/24/99 -0500, Adam P. Brodeur wrote:
>I had thought that the bulbs just got connected.  But, when I go to
>engage/disengage the diffs, I don't hear the accompanying vacuum sound.
As far
>as vacuum lines, none are disconnected from what I can see.
>
>Bob wrote:
>
>> "Adam P. Brodeur" wrote:
>>
>> > Hi all,
>> >
>> > PLEASE HELP.  After installing an aftermarket radio in my 84 4ksq, the
>> > center and rear diffs do not lock.  I took apart the dash to take a
>> > closer inspection and grabbed the Bentley.  I think I may have cracked
>> > the valve, but don't see any cracks.  What do you think could be wrong?
>> > My father thinks it could be the return valve.  He said that was a
>> > common problem on earlier Corvettes.  Any help would be appreciated in
>> > getting the diffs working and the dash back together.
>> >
>>
>> Corvettes? huh?
>>
>> For a stereo install you were working in that area so you can rule out
>> anything wrong under the car I would guess.  The first thing to check would
>> be the bulb connection. Maybe they are actually working but not being
>> indicated. Second would be a vacuum hose that came off the valve assy.  A
>> few inches later the rubber hose goes to plastic hoses, a little deeper in
>> the dash, it may have come off there. Third would be the valve itself. Good
>> luck, it should be an easy fix.
>>
>> Bob
>