[200q20v] diff lock from hell

Chewy4000 at aol.com Chewy4000 at aol.com
Wed Jan 23 20:41:51 EST 2002

In one of my 4000, sometimes i gotta drive some ft. in reverse.


In a message dated Wed, 23 Jan 2002  8:37:20 PM Eastern Standard Time, Chris Covington <malth at umich.edu> writes:

> So I came into a situation 2 nights ago whereupon my diff lock was needed,
> and once engaged I gained the traction I needed and all was good to go...
> EXCEPT the diff lock wouldn't disengage, no matter how many times I hit
> the switch, and no matter if the light on the switch was illuminated (not
> the green light in the diff diagram which was always on, but the yellow
> crescent-shaped one on the switch itself).  So figured, no big deal, that
> driving home would force the diff lock to automatically disengage above X
> mph anyway, well, no the diff lock was engaged even at 70mph.  Once
> getting home, after shutting the car off and restarting it, I was able to
> turn it off, and that seemed to be the end of that.
> So today I get in the car, fire it up, and I see the Anti-lock off light
> again, then the green diff lock light in the diff diagram, hmm.. it seems
> that the diff lock has engaged again.  I was able to turn it off (ABS
> was re-enabled, the green light was off) and get where I was going with
> the diff unlocked.  I think it was physically unlocked too, the car
> didn't feel squirrely or scrub the tires around corners.  So on the way
> home I fire up the 200q20v again and what do you know, it's engaged and
> I can't disengage it.  I tried shutting the car off, back on, and
> immediately disengaging it but this didn't work, so it seems I'm
> perma-difflocked now.
> Has this happened to anyone before?  Also, when that yellow
> crescent-shaped light is illuminated on the diff switch, is the diff
> supposed to be on or off?
> Chris
> '91 200q20v
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