Though Ford’s regular F-150 and F-250 were all new in 1997, the all new Super Duty trucks were not available until 1999. The Super Duty F-250 replaced the F-250 (based on the new F-150) and the F-250 HD (a continuation of the previous F-250) while the F-350 Super Duty replaced the previous F-350. The standard engine was a 255-horsepower 5.4-liter single overhead cam 16-valve Triton V8 gasoline engine that produced 350 foot-pounds of torque. Also available was a 310-horsepower 6.8-liter single overhead cam 20-valve V10 Triton gasoline engine that produced 425 foot-pounds of torque. Both Triton engines featured a new “limp home” mode that allows the truck to be driven a short distance even if all coolant has been lost, accomplished by the engine control computer alternately shutting off fuel to half of the cylinders, allowing them to pump air to keep the engine cool. A 235-horsepower 7.3-liter Power Stroke V8 diesel engine that produced 500 foot-pounds of torque was also available. Five-speed manual and four-speed automatic transmissions were available for all engines. The Super Duty trucks were available with a standard cab, a SuperCab, or a crew cab, and either a 6-3/4-foot or an 8-foot bed. Four wheel drive was available as an option on all models, and a dual-wheel rear axle was available for the F-350. Trim levels included the base XL, the mid-range XLT, and the top-of-the-line Lariat.
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