User Manual - Page 211

For F-450 2020.

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All available gears display with the current
gear indicated. Press the button again to
lock out gears beginning with the highest
gear. Example: press the button twice to
lock out 6th and 5th gears. Only the
available gears display and the
transmission automatically shifts between
the available gears. Press the + button to
unlock gears to allow the transmission to
shift to higher gears. The transmission
shifts automatically within the gear range
you select.
Manual (M)
Moving the gearshift lever to the manual
(M) position allows you to manually select
the gear you desire. Only the current gear
displays. Use the buttons on the gearshift
lever to manually select gears. Press the
+ button to upshift or the button to
downshift. Return the transmission to a
different gearshift position to deactivate
manual control.
Recommended shift speeds
Upshift according to the following chart:
6 Speed TransmissionsUpshifts when Accelerating (Recom-
mended for Best Fuel Economy)
Gasoline EnginesShift from:
8 mph (13 km/h)1 - 2
16 mph (26 km/h)2 - 3
22 mph (35 km/h)3 - 4
35 mph (56 km/h)4 - 5
44 mph (71 km/h)5 - 6
Upshifts when Accelerating (Recommended for Best Fuel Economy) 10 Speed
Diesel enginesGasoline enginesShift from:
10 mph (16 km/h)7 mph (11 km/h)1 - 2
15 mph (24 km/h)10 mph (16 km/h)2 - 3
19 mph (31 km/h)17 mph (27 km/h)3 - 4
22 mph (35 km/h)20 mph (32 km/h)4 - 5
25 mph (40 km/h)23 mph (37 km/h)5 - 6
31 mph (50 km/h)29 mph (47 km/h)6 - 7
208
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201909, First-Printing
Transmission
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