What gear should be used when driving downhill, and is braking necessary?

[JosiahRose]

When going downhill, it's essential to utilize the engine to help control the vehicle's speed. Shift to a lower gear, typically second or third, and apply the brakes as needed. Below are the relevant details: 1. Manual Transmission: A manual transmission, also known as a manual gearbox, is a type of transmission and the most basic form in automotive gearboxes. Its function is to alter the gear ratio, also known as the gear ratio, utilizing the principle of torque leverage. It employs the largest diameter low-speed gear with the longest radius to amplify the engine's torque, aiding the vehicle in starting forward movement. 2. Precautions: During the gear shifting process, it's crucial to ensure that the circumferential speeds of the pair of gear teeth to be meshed are equal (i.e., synchronized) to smoothly engage and shift gears. Forcing a gear shift when the gear teeth are not synchronized will inevitably cause impact and noise due to the speed difference between the two gear teeth. This not only makes shifting difficult but also affects the lifespan of the gear teeth, accelerates wear at the tooth ends, and may even lead to tooth breakage.