User Manual - Page 206

For 2020 Super Duty F-350 XL.

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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, for example, press the button twice
to lock out 6th and 5th gears. Only the
available gears display, and the
transmission shifts between the available
gears. Press the + button to unlock gears
to allow the transmission to shift to higher
gears. The transmission shifts 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 prefer. 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
203
Super Duty (TFE), enUSA, Edition date: 201909, Third-Printing-
Transmission
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