When taking a long steep downhill slope, what must you do with your gears?

When navigating a long steep downhill slope, it's essential to use one gear lower than you would typically use to ascend. This technique is crucial for maintaining control of the vehicle and managing its speed. Utilizing a lower gear helps to leverage engine braking, which means that the engine itself assists in slowing the vehicle down as it descends, reducing reliance on the brakes.

Brakes can overheat and wear out if used excessively on long downhill slopes, increasing the risk of brake failure. By downshifting, you maximize the braking force generated by the engine, allowing you to descend at a safe speed while minimizing the risk of overheating the brakes. This practice ensures better handling and safer maneuverability on steep descents.

Choices such as shifting into neutral, shifting up to a higher gear, or using the same gear as for ascending do not provide the necessary engine braking or control needed for safe descent. Each of these alternatives could lead to increased speed and reduced control, potentially resulting in hazardous driving situations.