> Has anyone heard of a way to test the viscous coupling in a Syncro?

From reading stuff on the list for the past 8 months, some people have
written that you:

1)  Jack up both tires on one side of the van and try to rotate the rear
    tire (i'm not sure if this is to test the viscous coupling or the diff-
    lock).

2)  Jack up both rear tires on a dolly and try VERY SLOWLY (creeper
    gear) to drive off  --  pulling the dolly  by the front wheels.

3)  Find a gravel hill and put it in granny gear, rev it and let the clutch
    out hard and watch for the front wheels to spin.  This also works
    well on snow and ice.

  4)  To check the diff- lock, put the diff lock 'on'  and try and drive an
    arc on pavement - the rear tires will 'skip' as they 'squib' along the
    pavement - about 10 feet is all that you'll need to do, as this is hard
    on the diff-lock.

If I missed something, I'm sure I'll hear about it.

Also try these two URLs for Syncro FAQs etc.
Good luck.   Malcolm S 91 Syncro

For some good Syncro info, you might try
www.pipline.com/~tforhan/swfaq.htm
and/or
www.pipeline.com/~tforhan/swbuying.htm

Good luck,   Malcolm S