What gear should be used for manual transmission when going down a long slope?

[EmersynRose]

It depends on the load and vehicle model. Generally, second gear is sufficient. The lower the gear, the stronger the car's power, but of course, the speed will be slower. When going downhill, it is advisable to use S gear or manual mode: You should alternate between using the brake and manual mode (low gear) to reduce brake wear. If you keep using D gear along with continuously pressing the brake pedal while going downhill, it will increase brake wear. Prolonged use of the brakes can cause the braking system to overheat, reducing braking effectiveness and compromising safety. When going downhill: The limiting gear is used as an auxiliary brake. By restricting the gear shift upwards, the engine is used as an auxiliary brake to reduce the working pressure on the brake pads.

[Imogen]

As someone who has driven manual transmission cars for years, I believe the most important thing when going down a long slope is to protect the brakes. Think about it - continuously pressing the brakes can make the brake discs glow red from heat, and if they fail, how dangerous that would be. I'm accustomed to shifting into a lower gear at the top of the slope, like using 2nd gear for steep slopes and 3rd for gentler ones, letting the engine whine as it drags the car along. This keeps the speed steady, and you don't have to keep your foot on the brake the whole time. Remember, never coast in neutral - the little fuel you save isn't worth the repair costs, and losing engine braking is especially dangerous. Once on a mountain road, I saw the car ahead with smoke coming from its brakes, a consequence of not using a low gear. If the slope is particularly long, it's best to stop midway to let the brakes cool down. RPM control is also key - if it exceeds 4000, it means the gear is too low and you should shift up; if the tachometer doesn't move but the speed increases, you need to downshift immediately.

[StHolden]

I enjoy the sense of control that comes with driving a manual transmission. When descending a long slope, I usually follow this procedure: Shift down to an appropriate lower gear at the top of the slope beforehand. The exact gear depends on the steepness—use 2nd gear for steep slopes and 3rd gear for gentler ones. After downshifting, the engine noise will increase, which is normal due to the engine braking effect. Releasing the throttle without pressing the brake will keep the car at a safe speed, and a light tap on the brake before turns is sufficient. This method saves brake pads and provides peace of mind, especially in rain or snow when engine braking is crucial. Last winter, I navigated mountain roads safely without skidding using this technique. Don’t believe the myth about coasting in neutral to save fuel—modern fuel-injected cars don’t waste much fuel this way, and safety is far more important. Also, pay attention to the engine sound; if it’s roaring too loudly, it means the gear is too low, and you should shift up. For extremely long slopes, stop at a safe area every half hour to check the brake temperature.

[VonAngelina]

I think downshifting to a lower gear on long descents is a basic operation. Simply put, avoid using high gears like 4th or 5th, and switch to 2nd or 3rd gear instead. The principle is straightforward: a lower gear means higher engine RPM, which helps restrain the wheels and prevents the car from accelerating uncontrollably. Shift to the lower gear before starting the descent and keep your right foot off both the accelerator and brake to naturally control the speed. If the speed still increases during the descent, immediately apply some brake and downshift further. Never consider shifting to neutral—it's too dangerous. Keep the RPM within a reasonable range and avoid hitting the redline. During breaks on long descents, you can check the wheel hub temperature by touching it; if it feels hot to the touch, it indicates excessive brake load. This method is particularly effective on winding mountain roads like those in Yunnan and Guizhou.

[DelMadelyn]

Let me share my experience driving a manual transmission. When going down a long slope, shifting to a lower gear helps protect the braking system and makes driving safer. The specific operation is to slow down and shift gears at the start of the slope, choosing 2nd or 3rd gear depending on the gradient. Once on the slope, completely release the throttle and use the engine's low-speed resistance to control the vehicle's coasting speed. This way, you don't need to keep your foot on the brake continuously, avoiding brake overheating and failure. If the speed starts to increase, gently apply the brake and then continue using gear control. An important reminder is never to coast in neutral, especially on roads with many curves. Also, keep an eye on the tachometer to prevent the needle from entering the red danger zone. For particularly long downhill roads, it's best to pull over every 20 minutes to let the brakes cool down.

[VonWalker]

The key to operating a manual transmission on long downhill slopes lies in gear selection. Personally, I prefer to engage 2nd or 3rd gear depending on the steepness, prioritizing lower gears for steeper slopes. This gear position generates sufficient engine braking force to prevent uncontrolled speed increase. The crucial point is to complete the downshift before reaching the crest of the hill, then release the throttle to let the vehicle coast downhill. At this point, the engine will naturally restrain the vehicle's speed, requiring minimal use of the brake pedal. If the speed slightly increases midway, gently apply the brakes and consider downshifting another gear. Absolutely avoid neutral gear, as this would make the braking system solely responsible for speed control. Simultaneously monitor the tachometer to maintain RPM within safe limits. Extended downhill driving can cause brake overheating, so remember to stop at safe locations for periodic checks.