Ford 2006 Town Car Owner's Manual page 220

Tires, Wheels and Loading
All Rear Wheel Drive (RWD) vehicles:
This applies to all cars and 4x2 trucks/sport utilities with rear wheel
drive capability.
• Place the transmission in N (Neutral)
• Maximum speed is 35 mph (56 km/h)
• Maximum distance is 50 miles (80 km)
If a distance of 50 miles (80 km) or a speed of 35 mph (56 km/h) must
be exceeded, you must disconnect the driveshaft. Ford Motor Company
recommends the driveshaft be removed/installed only by a qualified
technician at an authorized dealer. See your authorized dealer for
driveshaft removal/installation.
Improper removal/installation of the driveshaft can cause
transmission fluid loss, damage to the driveshaft and internal
transmission components.
220
2006 Town Car (tow)
Owners Guide (post-2002-fmt)
USA (fus)