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Why Does an Automatic Transmission Car Make Abnormal Noises When Shifting Gears?

1 Answers

Brielle

07/25/25 12:39pm

Automatic transmission cars may produce abnormal noises when shifting gears due to persistent dirt and impurities inside the transmission. Here are the relevant details: 1. Persistent dirt and impurities: Dirt and impurities accumulate inside the valve body of an automatic transmission, forming blockages that prevent effective regulation of oil pressure, leading to abnormal noises. 2. Transmission components: The transmission consists of numerous parts, making the causes of noise quite complex. When analyzing and diagnosing, pay attention to whether the noise is related to specific speeds, such as planetary gears that may produce noticeable noises around 50 km/h. Also, check if the noise is associated with certain gears, which is crucial for diagnosing transmission issues. If a particular gear produces noise, it is likely related to the components affecting that gear's power transmission.

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