Ford F-250 Owner's Manual page 286

Driving
Only the current gear will be displayed. Press the + button or the –
button to upshift or downshift. If the – button is pressed at a vehicle
speed that would cause an engine overspeed, the requested gear will
flash then disappear and the transmission will remain in the current gear.
Recommended shift speeds
Upshift according to the following chart:
(recommended for best fuel economy)
Shift from:
1 – 2
2 – 3
3 – 4
4 – 5
5 – 6
In order to prevent the engine from running at too low an RPM, which
may cause it to stall, the SST will still automatically make some
downshifts if it has determined that you have not downshifted in time.
Although the SST will make some downshifts for you, it will still allow
you to downshift at any time as long as the SST determines that the
engine will not be damaged from over-revving.
The SST will not automatically upshift, even if the engine is approaching
the RPM limit. It must be shifted manually by pressing the + button.
Engine damage may occur if excessive engine revving is held
without shifting.
Hill start assist (HSA)
The hill start assist feature makes it easier to pull away when the vehicle
is on a slope without the need to use the parking brake. When the hill
start assist feature is active, the vehicle will remain stationary on the
slope for up to two seconds after you release the brake pedal. During
this time, you have time to move your foot from the brake to the
accelerator pedal and pull away. The brakes are released automatically
once the engine has developed sufficient drive to prevent the vehicle
from rolling down the slope. This is an advantage when pulling away on a
slope; for example from a car park ramp, traffic lights or when reversing
uphill into a parking space.
286
2011 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)
Upshifts when accelerating
Gasoline engines
15 mph (24 km/h)
25 mph (40 km/h)
40 mph (64 km/h)
45 mph (72 km/h)
50 mph (80 km/h)
Diesel engines
12 mph (19 km/h)
19 mph (31 km/h)
26 mph (42 km/h)
34 mph (55 km/h)
46 mph (74 km/h)