Why does the car shake when in D gear?
2 Answers
The reason for the car shaking when in D gear comes from the transmission. When the gear is in D, it is in a power connection state; the engine's power is transmitted to the transmission, which then transmits it to the wheels through the drive shaft. The car is supposed to move forward, but since the brakes are engaged and the car cannot move, the transmission continuously holds back this force, resulting in shaking. Precautions for driving an automatic transmission: 1. The S gear is not a cure-all. When shifting into S gear, the car can freely change gears. Although this is convenient, it should be avoided in daily use. Frequent use of the S gear can severely affect the transmission. Typically, the S gear is used for high-speed overtaking. 2. When waiting at a red light for an extended period, apply the foot brake. If the wait at an intersection is too long, you can shift the car into N gear and engage the handbrake. Prolonged use of the foot brake can cause the fuel temperature in the transmission to rise excessively.
Last time when I drove with the gear in D, the car shook violently, which really scared me. As a student who enjoys studying cars, I looked it up and found out that this is usually caused by issues with the signal engine or transmission. The most common reasons are worn-out spark plugs or faulty ignition coils, which can make the car idle unevenly and shake. On the transmission side, insufficient oil pressure or worn clutch plates might make the car shake like it's dancing. It could also be due to aging engine mounts—if the rubber cushion is damaged, the damping effect is lost. Even unbalanced tires or problems with the driveshaft can cause shaking when stationary. If you encounter this situation, it's best not to drive for too long and get it checked at a repair shop to prevent bigger issues. I remember last time, changing a spark plug made a big difference. In short, driving safety comes first—don’t delay and get it checked at a proper shop.
