Can You Brake During Clutch Semi-Engagement?
2 Answers
You can brake during clutch semi-engagement, but it is not recommended to do so. Semi-engagement measures should only be taken when absolutely necessary, as this operation will accelerate clutch wear. However, it basically causes no harm to other vehicle components. Even when the clutch is fully disengaged, it still causes wear to the clutch at idle speed. The clutch is a hydraulically controlled wet clutch. When the engine is running, as long as the gear is engaged, the transmission is always in a semi-engaged state. In case of traffic congestion, although there is a circulating cooling system, frequent semi-engagement operations can still easily raise the temperature of the clutch's hydraulic oil. If the temperature reaches a critical value, the viscosity of the oil will decrease, which can easily lead to clutch failure, damage to the transmission, and negatively affect the service life of the clutch.
I think it's acceptable to brake while the clutch is in the semi-engaged state, but you must be cautious about specific situations. As someone who has driven manual transmission cars for many years, I often use this technique during city traffic jams to coast slowly, such as when waiting at a red light or in a queue. Lightly tapping the brake helps control speed and prevents getting too close to the vehicle in front, which generally doesn't cause major issues. However, if you're on an uphill or steep slope, braking while the clutch is semi-engaged may cause the car to shake or even stall, and it can accelerate wear on the clutch friction plate. I remember once trying to start on a slope without using the handbrake, relying only on the clutch and brake, and the car rolled backward nearly causing an accident while the clutch overheated. Now, I would advise beginners to learn how to use the handbrake for assistance, especially on inclines. When the clutch is in a semi-engaged state, the engine power isn't fully released, and frequent or forceful braking increases the risk of slippage and wear, which can shorten the clutch's lifespan over time. It's relatively safe to use this technique on flat roads, but try to avoid high-intensity situations.
