When driving down a steep grade, which gear is recommended for slowing down?

Using low gear when driving down a steep grade is recommended because it allows the engine to assist in controlling the vehicle's speed through engine braking. In low gear, the engine operates at a higher RPM, which provides greater resistance against the force of gravity. This helps prevent the vehicle from gaining too much speed and reduces reliance on the brakes, thereby preventing brake overheating and potential failure.

Utilizing low gear also enhances vehicle stability and control on steep slopes. It can be especially important when driving vehicles that are heavier or have significant load, as the demands of maintaining control and safety increase. The lower gear effectively keeps the vehicle within a manageable speed range, allowing the driver to focus on steering and avoiding obstacles rather than constantly reacting to rapid speed increases.