Towing quattro without driveshaft?

[Thomas Barbera]

Fellow audifans,
I am trying to find a way to tow my sister's '96 A4
quattro automatic from her place to mine, about 600
miles.  The cheapest way is to rent a dolley and tow
it with a truck.  The question is if we remove the
center driveshaft is it safe to tow the car with the
rear wheels on the ground?  This won't damage the rear
diff will it?  Any advice would be greatly
appreciated.  Thanks. 

Tom B.
'91 V8 5spd
'96 A4Q auto (sister's)