2011 Ford F450 Super Duty Crew Cab Owner Guide 4th Printing - Page 288

Driving To activate tow/haul, press the button on the end of the gearshift lever. The TOW HAUL indicator light will illuminate in the instrument cluster. Tow/haul delays upshifts to reduce frequency of transmission shifting. Tow/haul also provides engine braking in all forward gears when the transmission is in the D (Overdrive) position; this engine braking will slow the vehicle and assist the driver in controlling the vehicle when descending a grade. Depending on driving conditions and load conditions, the transmission may downshift, slow the vehicle and control the vehicle speed when descending a hill, without the brake pedal being pressed. The amount of downshift braking provided will vary based upon the amount the brake pedal is pressed. Tow/haul may be automatically activated (without pressing the tow/haul button). This provides engine braking to assist the vehicles braking system when going downhill and repetitive braking is sensed. Once the tow/haul mode has been automatically activated it will not automatically deactivate. To deactivate the tow/haul feature and return to normal driving mode, press the button on the end of the gearshift lever. The tow/haul light will no longer be illuminated. Tow/haul will also deactivate when the vehicle is powered down for a few minutes. WARNING: Do not use the tow/haul feature when driving in icy or slippery conditions as the increased engine braking can cause the rear wheels to slide and the vehicle to swing around with the possible loss of vehicle control. M (Manual) without Overdrive With the gearshift lever in M (Manual), the driver can change gears up or down as desired. This is called SelectShift Automatic™ transmission (SST) mode. By moving the gearshift lever from drive position D (Overdrive) to M (Manual) you now have control of selecting the gear you desire using buttons on the shift lever. 288 2011 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)