
It is not okay to pull the handbrake in D gear. D gear is the forward driving gear and is not intended for cutting off power, so you should not engage the handbrake while in D gear. The electronic handbrake is a technology that uses electronic control to achieve parking braking, and its working principle is the same as that of a mechanical handbrake. Principle of the electronic handbrake: The electronic handbrake achieves parking braking through electronic regulation. Its working principle is similar to that of a mechanical handbrake, except that the traditional mechanical handbrake lever is replaced by an electronic button. Function of the electronic handbrake: The electronic handbrake, also known as the electronic parking brake system, combines the temporary braking needed during driving with the long-term braking required after parking, achieving parking braking through electronic control. Additionally, it extends to the auto-hold function, allowing the driver to avoid prolonged braking when the vehicle is parked, effectively preventing the vehicle from rolling.

As an experienced auto mechanic with years of practice, I'm telling you that applying the handbrake while in D gear on an automatic transmission is absolutely a bad idea. When the engine is in D gear, it constantly wants to move forward, but you're forcibly holding it back with the resistance of the brakes. This will wear out transmission components and may lead to transmission overheating or even damage the torque converter inside. I once had a customer who did exactly this, resulting in severe vehicle shaking and repair costs running into thousands. The correct procedure is to first bring the vehicle to a complete stop, then shift to P gear before applying the handbrake. Regular checks of transmission fluid and brake systems are also crucial because if the handbrake itself becomes loose, the vehicle might roll when parked on slopes. Developing good habits is essential - don't cut corners for convenience. Remember, vehicles are designed to primarily use P gear to lock the gears. Avoid prolonged use of D gear with brakes applied, as this only accelerates wear and tear.

As an ordinary car owner, I'd like to share my personal experience. Once at a traffic light, I was too lazy to shift gears and simply pulled the handbrake while still in D gear. The engine suddenly started shaking violently, making strange noises as if the car was stuck, and I almost got rear-ended by the vehicle behind me. Later, the mechanic explained that when in D gear, the engine continuously delivers power, and forcibly stopping it with the handbrake is like two people playing tug-of-war, which can easily damage the transmission system and braking components. Since then, I always use the foot brake or shift to P gear when temporarily parked to avoid making similar mistakes. Actually, the parking logic for automatic transmissions is quite simple: use P gear plus handbrake for long stationary periods, and for short stops like waiting at traffic lights, you can stay in D gear with foot brake but never use the handbrake. Spending a few extra seconds to shift gears properly protects your vehicle and ensures greater safety.

As a safe driving advocate, I emphasize the serious risks of engaging the handbrake while in Drive (D) mode. The vehicle's engine and transmission system remain operational in D gear, and applying the handbrake increases component friction, leading to premature brake wear or transmission failure. Should braking fail, the vehicle may slide and cause accidents. The correct procedure is to first depress the brake pedal to bring the vehicle to a complete stop, then shift to Park (P) or Neutral (N) before engaging the handbrake. This habit is especially crucial when parking on slopes, as gravity amplifies the risk. For safety, novice drivers must master these fundamentals, and regular brake system can prevent mishaps.

From a practical driving perspective, it's advisable not to use D gear and the handbrake simultaneously. When the engine is in D gear, it's in a forward-driving state, and pulling the handbrake forcibly locks the wheels, causing conflict between the two. This creates unnecessary pressure and heat, shortening component lifespan. For brief stops like at intersections, simply using the foot brake is sufficient; for long-term parking, it's more reasonable to shift to P gear before engaging the handbrake. Developing this simple habit can prevent many issues, such as avoiding transmission damage or brake line loosening. Regularly checking the handbrake's tension is also crucial to ensure it can hold the car on slopes.

Speaking from a young driver's perspective. One time my buddy tried pulling the handbrake while in D gear in a parking lot, and the car made a grinding noise before getting damaged. Fixing the transmission cost several thousand bucks—totally not worth it. In D gear, the engine is actively turning the wheels, and forcibly stopping with the handbrake just causes severe internal friction, which could lead to a breakdown over time. The safe way is to shift to P gear immediately after parking, then engage the handbrake—everything will work smoothly. Don’t overlook these small steps; they prevent accidental vehicle movement or part wear, making daily easier too.


