Re: Diffs not working

[Bob <mx@snet.net>]

"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