1999 Ford F350 7.3L Diesel Supplement 1st Printing - Page 14

Driving tips TRANSMISSION SHIFT SPEEDS Do not overspeed the engine when going downhill or steep grades. Do not allow engine speed to exceed the redline area of the tachometer. Operating the engine beyond the governed speed can cause severe engine damage. Upshift and downshift 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 8 km/h (5 mph) 3 km/h (2 mph) 1-2 16 km/h (10 mph) 6 km/h (4 mph) 2-3 32 km/h (20 mph) 13 km/h (8 mph) 3-4 48 km/h (30 mph) 19 km/h (12 mph) 64 km/h (40 mph) 24 km/h (15 mph) 4 - D (Overdrive) Maximum downshift speeds 1 6-speed transmission Shift from: Transfer case position (if equipped)2 2H or 4H 4L D (Overdrive) - 4 72 km/h (45 mph) 26 km/h (16 mph) 4-3 56 km/h (35 mph) 19 km/h (12 mph) 3-2 32 km/h (20 mph) 13 km/h (8 mph) 2-1 8 km/h (5 mph) 3 km/h (2 mph) 1-LO Only shift to LO when at a stop. Use 2H or 4H for 4WD equipped vehicles. Downshift at lower speeds when driving on slippery surfaces. 1 2 TRAILER TOWING Refer to your "Owner Guide" for full details on towing a trailer. Econoline trailer towing tables Your vehicle may tow a class I, II or III trailer provided the maximum trailer weight is less than or equal to the maximum trailer weight listed for your engine and rear axle ratio on the following charts. 14