2010 Ford F450 Super Duty Crew Cab Owner Guide 2nd Printing - Page 279

Driving the redline area. Operating the engine beyond the recommended speeds can cause severe engine damage. Shift according to the following shift speed charts: Upshifts when accelerating (recommended for best fuel economy) 6-speed transmission Shift from: Transfer case position1 (if equipped) 2H or 4H 4L LO-1 5 mph (8 km/h) 2 mph (3 km/h) 1-2 14 mph (23 km/h) 6 mph (10 km/h) 2-3 22 mph (35 km/h) 9 mph (14 km/h) 3-4 30 mph (48 km/h) 12 mph (19 km/h) 40 mph (64 km/h) 15 mph (24 km/h) 4 - D (Overdrive) Maximum downshift speeds1 6-speed transmission Shift from: Transfer case position (if equipped)2 2H or 4H 4L 45 mph (72 km/h) 16 mph (26 km/h) D (Overdrive) - 4 4-3 35 mph (56 km/h) 12 mph (19 km/h) 3-2 20 mph (32 km/h) 8 mph (13 km/h) 2-1 5 mph (8 km/h) 2 mph (3 km/h) 1-LO Only shift to LO when at a stop. 1 Use 2H or 4H for 4WD equipped vehicles. 2 Downshift at lower speeds when driving on slippery surfaces. Reverse 1. Make sure that your vehicle is at a complete stop before you shift into R (Reverse). Failure to do so may damage the transmission. 2. Move the gearshift lever into the neutral position and wait at least three seconds before shifting into R (Reverse). Note: The gearshift lever can only be moved into R (Reverse) by moving it from left of 3 (Third) and 4 (Fourth) before shifting into R (Reverse). This is a lockout feature that protects the transmission from accidentally being shifted into R (Reverse) from D (Overdrive). 279 2010 F-250/350/450/550 (f23) Owners Guide, 2nd Printing USA (fus)