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Why does the car make a creaking sound at low speeds but disappears after acceleration?

1 Answers

SanSamuel

07/30/25 6:59am

If the car makes abnormal noises at idle speed and the noises disappear after pressing the clutch, it indicates that the source of the noise is a transmission fault. Internal contamination of the transmission: When an automatic transmission malfunctions, in many cases, it is not due to damage to the internal valve body but rather the presence of stubborn dirt and impurities inside. Especially when dirt and impurities accumulate inside the valve body, forming blockages, it prevents effective regulation of oil pressure, leading to issues like jerking, impact, and slippage. High temperature damages the transmission: High temperatures can degrade the quality and friction characteristics of automatic transmission fluid, increasing friction and wear, which results in transmission noise. At the same time, sludge can form inside the transmission, causing jerking and impact. If the temperature exceeds 120 degrees Celsius, rubber sealing materials begin to harden, eventually leading to leaks and reduced hydraulic pressure. If the temperature rises even higher, the transmission starts to slip, and the slippage in turn causes the temperature to rise further.

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