What is the appropriate speed for downshifting from fourth gear to second gear?

[DelGabrielle]

When downshifting from fourth gear to second gear, the speed should be reduced to around 30 km/h. First gear serves as a buffer gear; after a smooth start, slightly press the accelerator and then shift to second gear, which must be completed within 50 meters during the test. For second gear, if the speed exceeds 20 mph, you can shift to third gear, which must be completed within 150 meters during the test. Third gear is commonly used at speeds above 20 mph and below 40 mph, while fourth gear is engaged when the speed reaches 40 mph. Reasons for gearshift jerking: The engine speed does not match the current vehicle speed, meaning there is a speed difference between the engine speed and the clutch plate speed. Solutions for gearshift jerking are as follows: Adjust the gearshift speed; adjust the gear engagement sequence; shorten the gearshift time; lightly press the accelerator when shifting gears.

[DamianMarie]

When downshifting from fourth to second gear, I find 30 to 40 kilometers per hour to be the most suitable speed range, which is quite common in actual driving. As a frequent manual transmission driver who has gone through numerous downshifting processes, this range provides me with sufficient power during turns or uphill climbs without causing excessive vehicle shudder. I remember one time in urban congestion when downshifting too quickly nearly stalled the engine—later I learned to judge by watching the tachometer or listening to engine sounds; shifting too slowly, however, would increase fuel consumption. I recommend that beginners practice smooth operations and coordinate throttle control to minimize jerking. Always prioritize road safety, especially in rain or snow when decelerating requires extra caution to reduce accident risks. Regular checks of the clutch and transmission ensure smoother driving and prolong vehicle lifespan. In summary, gentle driving is key.

[AliceAnn]

After years of driving manual transmission cars, I find shifting from 4th to 2nd gear at speeds between 35 to 45 km/h works well. Personal experience tells me it depends on your intention: if you're preparing to accelerate for overtaking or climbing a steep hill, opt for higher speeds around 45 km/h; when descending gentle slopes, around 30 km/h is better. Once, I downshifted too quickly at a highway exit, causing the car to shake violently—it gave me quite a scare. Since then, I match engine RPM to avoid this. When performing the shift, lightly press the clutch with your left foot while slightly adding throttle with your right foot to keep it smooth. Developing this habit protects car components, such as preventing transmission wear, and helps save fuel and money. Remember, speed varies with road conditions—the more you practice, the more confident you become, making daily commutes more comfortable and safer.

[StJordan]

From a technical perspective, the speed for downshifting from fourth to second gear should be maintained between 25 to 35 kilometers per hour. The ideal condition is to keep the engine RPM between 2000 and 3000 to avoid stalling from being too low or engine damage from being too high. Synchronizing the clutch and throttle during operation helps minimize shock. For example, when driving in urban areas, this speed range ensures smoother gear shifts and prevents component wear. Regular transmission maintenance can reduce potential issues. Mastering this speed range enhances both driving feel and vehicle performance, making the driving experience more worry-free.