Jon, I'll add to this. I don't think it IS possible to have the Cruise Control do what you ask, because it would then really not hold a speed on the "flat". Ford deliberately TRIED to engineer the CC to hold a speed. If you notice, going downhill with the CC set, the Torque Converter will stay locked up to provide engine braking. If you turn the CC off, the TC will immediately unlock and the speed will increase.
There used to be a "poor man's" CC in the olden days called a "Throttle Control". It essentially held the gas pedal in a constant position, uphill or down. It wasn't very popular.
You CAN actually get better gas mileage using your "foot" and "roller coastering", as 88 said. I tend to be lazy though and just use the CC as much as I can.
One more thing though. Bill can adjust the shift pattern in your truck to make the truck less (or more) aggressive in downshifting when climbing hills. I personally think Ford has it downshifting too quickly.
- Jack
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2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam
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