FORD 2008 F-550 v.4 - Manual (Page 293)

Additional equipment such as snowplow equipment may effect
the performance of the airbag sensors increasing the risk of
injury. Please refer to the Ford Truck Body Builders Layout Book for
instructions about the appropriate installation of additional equipment.
Transmission operation while plowing
Operate the vehicle with the automatic transmission gearshift lever in
the D (Overdrive) position and Tow/Haul off.
• Shift transfer case to 4x4 LOW when plowing in small areas at speeds
below 5 mph (8 km/h).
• Shift transfer case to 4x4 HIGH when plowing larger areas or light
snow at higher speeds. Do not exceed 15 mph (24 km/h).
• Do not shift the transmission from a forward gear to R (Reverse) until
the engine is at idle and the wheels are stopped.
• If the vehicle is stuck, shift the transmission in a steady motion
between forward and reverse gears. Do not rock the vehicle for more
than a few minutes. The transmission and tires may be damaged or
the engine can overheat.
Do not rock the vehicle if the engine is not at normal operating
temperature. Do not rock the vehicle for more than a minute. The
transmission and tires may be damaged or the engine may
overheat.
Refer to Transmission fluid temperature gauge in the Instrument
Cluster chapter for transmission fluid temperature information.
Do not spin the wheels at over 35 mph (56 km/h). The tires may
fail and injure a passenger or bystander
2008 F-250/350/450/550 (f23)
Owners Guide (post-2002-fmt)
USA (fus)
Driving
293