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What Causes Vehicle Vibration Between 70 and 80 km/h?

1 Answers

LillianaDella

07/29/25 9:05pm

Vehicle vibration between 70 and 80 km/h may be caused by aging or damage to the engine or transmission mounts. Common causes of vehicle vibration: Throttle body issues. The main reason for a dirty throttle body is carbon buildup at the junction between the throttle valve shaft and throttle body, resulting in imprecise throttle opening and causing idle vibration. You can clean the throttle body; if vibration persists after cleaning, the throttle body may be damaged and require replacement. Fuel quality problems. Poor gasoline quality can lead to inadequate atomization by the fuel injectors, causing incomplete combustion of the air-fuel mixture in the cylinders and resulting in idle vibration. It's recommended to use higher-grade gasoline after consuming the current tank and perform a fuel system cleaning. Definition of transmission: A transmission is a gearbox that changes the transmission ratio and direction of motion. Located between the clutch and central drive, its main functions are to alter the vehicle's driving force and speed (gear shifting) while maintaining constant engine speed and torque, enable reverse driving (direction change), and allow the engine to idle when stopped (neutral gear). Based on transmission types, gear transmissions can be categorized into three types: dual-shaft, triple-shaft, and compound configurations.

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