Ford 2011 Explorer Owner's Manual page 291

Driving
The tow feature delays upshifts to reduce frequency of transmission
shifting. Tow 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 accelerator pedal
being pressed. The amount of downshift braking provided will vary based
upon the amount the brake pedal is depressed.
To deactivate the tow feature and return to normal driving mode, press
the TOW button. The tow light will no longer be illuminated.
When you shut-off and restart the engine, the transmission will
automatically return to normal D (Overdrive) mode (tow off).
WARNING: Do not use the tow 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.
D (Drive) with Grade Assist
Pressing the transmission control switch on the side of the gearshift
lever activates grade assist and cancels overdrive.
Grade assist:
• Provides additional grade
(engine) braking and extends
lower gear operation on uphill
climbs for hilly terrain or
mountainous areas.
• Provides additional engine
braking through the automatic
transmission shift strategy which
reacts to vehicle inputs (vehicle
acceleration, accelerator pedal, brake pedal and vehicle speed).
• Allows the transmission to select gears that will provide the desired
engine braking based on the vehicle inputs mentioned above. This will
increase engine RPM during engine braking.
290
2011 Explorer (exp)
Owners Guide, 1st Printing
USA (fus)