Ford Windstar Owner's Manual page 309

When using snow tires, make sure they are the same size
and grade as the tires you normally use on your vehicle.
Do not use chains when using a temporary spare. For full size
tires, use chains on the tires only in an emergency or if the law
requires them where you live. When you use the tire chains:
Make sure the chains are the right size for your tires. Use
only SAE Class "S" chains. Other types may damage your
vehicle.
Put chains on tightly with the ends held down securely.
Follow the chain manufacturer's instructions.
Drive slowly. If you can hear the chains rub or bang against
your vehicle, stop the vehicle and tighten the chains. If you
continue to hear the chains rub or bang against your vehicle,
remove the chains to prevent damage to your vehicle.
Avoid fully loading your vehicle if possible.
Remove tire chains at the first opportunity after using them
on snow and ice. Do not use the chains on dry roads.
Limited chain clearance exists with P215/70R15 tires. If your
vehicle is equipped with these tires, extra care must be observed
to avoid damage with chains.
Be sure:
The chains are fully tightened
The vehicle is driven below 30 MPH (50 km/h)
The vehicle is lightly loaded
To avoid sharp turns
Make sure your suspension insulators and bumpers are not
missing or worn to avoid damage to your vehicle.
Maintenance and Care
WARNING
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