Is CVT Transmission Noise Normal?
2 Answers
CVT transmission noise is abnormal and requires timely inspection and repair. Detailed explanation of faults: Abnormal noises during vehicle startup are generally caused by suspension system failures, which may result from loose or damaged engine mounts. Noises during steering may indicate issues with the steering system or suspension system. During turning, vehicle tilt causes deformation in the suspension system, which also participates in the movement. Other possible causes: Noises during driving on good road conditions may stem from brake system component failures: possibly due to loose or worn brake components, out-of-round brake drums, or uneven brake disc surfaces. It could also indicate problems with bearings connecting moving and stationary parts: if it's a bearing issue, drivers can identify it by applying slight braking. If the noise remains unchanged during uniform motion when braking, it confirms a bearing problem.
My car has a CVT transmission, and I've been driving it for almost five years now. I noticed a slight humming sound right after I got the car. I specifically asked the 4S店 technician about it, and they said it's the normal working sound of the CVT steel belt rubbing against the cone pulley, especially noticeable when accelerating at low speeds. However, the technician reminded me to pay attention to distinguishing sounds: if I hear metal knocking or obvious jerking, I should take it seriously. Now, during every maintenance session, I ask the mechanic to check the transmission sound, and I make sure to change the专用变速箱油 on time. Actually, for regular family cars, there's no need to worry too much. As long as the sound doesn't suddenly get louder or come with车身抖动, it's generally fine. I've even gotten used to this background noise while driving.
