Why does the car make a creaking sound at low speeds but disappears after acceleration?
3 Answers
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.
I've encountered a similar issue before – a constant creaking noise from under the car at low speeds, especially noticeable when turning or going over bumps, but it quiets down when accelerating. This is mostly caused by problems in the suspension system, such as aging rubber bushings or loose shock absorber connections, which create strange noises due to friction at low speeds. Once the speed increases, the vibrations become stronger, and the noise disappears. This kind of situation needs timely repair; otherwise, increased wear could lead to unstable steering or uneven tire wear, affecting driving safety. It's best to get a chassis inspection at a reliable repair shop. Don’t underestimate these small noises—addressing them early saves both money and hassle.
My old car keeps making squeaking noises at low speeds, but the sound completely disappears when I accelerate. Turns out it was a brake issue. At low speeds, the brake discs and pads make uneven contact, causing friction noises, but at higher speeds, they smooth out. After inspection, I found it was due to worn or stuck brake pads—simple adjustments or replacements fixed the problem. Such noises are more common on humid days or during cold starts, but don’t ignore them. If left unchecked, they could damage the wheel hubs or affect braking efficiency. I suggest lightly pressing the brakes to see if the noise lessens. If that doesn’t work, it’s best to have a mechanic diagnose it.
