What Causes Vibration When in D Gear and Braking?
2 Answers
If the vibration is slight, it is a normal phenomenon. If the vibration is severe, it may be caused by a damaged engine mount. The following is an introduction to engine mounts: There are engine mount components between the connection points of the engine and the vehicle frame, usually made of rubber, which can buffer certain vibrations from the engine. Without the mounts, the vibrations from the engine during operation would be directly transmitted to the vehicle body, directly affecting ride comfort. Moreover, prolonged use of rubber products can lead to aging, where the mounts harden over time, causing the engine's vibrations to be directly transmitted to the vehicle body.
As a driver myself, I often experience shaking when in D gear and stepping on the brake, which I believe is mostly related to the transmission. If the torque converter is sluggish or inflexible during power transmission, it can cause the vehicle to shake, especially in older cars. Engine issues can also contribute, such as aging spark plugs or a clogged idle control valve, leading to unstable engine output that transmits throughout the body. Whenever I encounter this, I first check if the idle speed is steady and then use simple tools to scan for trouble codes. Don’t delay repairs—prolonged shaking can accelerate transmission wear and increase fuel consumption. I ignored minor shaking two years ago and ended up spending a lot to replace the entire drivetrain. Regular maintenance like changing spark plugs and cleaning the throttle body can prevent most issues, saving both money and hassle.
