FORD 2003 F-150 v.3 - Manual (Page 170)

If a distance of 80 km (50 miles) or a speed of 56 km (35 mph) must be
exceeded, the drive shaft will have to be removed before the vehicle is
towed.
Ford recommends the driveshaft be removed/installed only by a qualified
technician. See your local dealer for driveshaft removal/installation.
Improper removal/installation of the driveshaft can cause
transmission fluid loss, damage to the driveshaft and internal
transmission components.
4WD vehicles electronic shift transfer case:
4x4 vehicles with electronic shift on the fly cannot be towed with any
wheels on the ground.
SNOWPLOWING
Ford recommends the following specifications for low speed, personal
use snow removal:
• F-150 4x4 (except F-150 Supercrew, Lightning and Harley-Davidson
models)
• 5.4L engine
• Heavy-duty service package
• Super engine cooling
• Heavy-duty front suspension package
• Automatic transmission with auxiliary automatic transmission fluid
cooling
• All-terrain tires
• Limited slip and optional axle ratio.
Do not install a snowplow and plow with your vehicle until it has been
driven at least 800 km (500 miles).
Installing the snowplow
Read the following instructions before installing a snowplow:
• Front GAWR must not exceed 63% of the GVW. Add ballast weight to
the back of the vehicle, if necessary. Refer to the Safety Compliance
Certification Label to find your vehicle’s front GAWR.
• The Front Axle Accessory Reserve Capacity and the TARC listed on
the bottom right of the Safety Compliance Certification Label will
determine whether or not the addition of a snowplow will overload
your vehicle.
Driving
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