FORD 2013 Explorer v.1 - Manual (Page 221)

D (Drive) with Overdrive
The normal driving position for the best fuel economy. Transmission
operates in gears one through six.
The automatic transmission shift strategy has the ability to detect hilly
terrain or mountainous areas and will provide a limited amount of grade
assist features automatically. Refer to D (Drive) with Grade assist or
SelectShift for more information.
D (Drive) with Tow on
Press the TOW switch located on the instrument panel by the headlamp
control to activate tow. The TOW/HAUL message will illuminate in the
instrument cluster.
The tow feature improves transmission operation when towing a trailer or
a heavy load. All transmission gear ranges are available when using tow.
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.
Press the TOW button to deactivate the tow feature and return to
normal driving mode. 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).
D (Drive) with Grade Assist
Press the transmission control switch on the
side of the gearshift lever to activate grade
assist and cancel overdrive.
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Transmission 221
2013 Explorer (exp)
Owners Guide gf, 1st Printing
USA (fus)