What is the reason for the transmission rattling noise that stops when the clutch is pressed?
2 Answers
The reason for the transmission rattling noise that stops when the clutch is pressed is due to a problem with the power input shaft. When this occurs, the vehicle owner needs to have the transmission's power input shaft inspected. The transmission, also known as the gearbox, is an automotive component used to alter the speed and torque from the engine, and can fix or change the transmission ratio between the output and input shafts in different gears. The transmission consists of a gear transmission mechanism and a control mechanism, with some vehicles also having a power take-off mechanism. It can be categorized into stepped, continuously variable, and integrated transmissions, and functions to enable reverse driving, interrupt power transmission, and change gear ratios.
I also encountered a strange phenomenon with my old car where the transmission made a rattling noise that stopped when I pressed the clutch. After pondering for a while, I figured it out. This is most likely an issue with the clutch release bearing. It spins at high speed when the engine transmits power, and when worn, it produces a rattling sound. The noise disappears when the clutch is pressed because the bearing load is reduced. It could also be related to a faulty transmission input shaft bearing or an unbalanced clutch pressure plate. Don’t take it lightly—I recommend going to a repair shop as soon as possible to check if the release bearing is intact. Otherwise, over time, it might damage the clutch disc or even the entire transmission. During the inspection, remember to check if the transmission fluid level is normal, as insufficient fluid can accelerate wear. Maintaining regular maintenance habits, such as changing the clutch fluid every 20,000 kilometers, can prevent such problems. If you hear unusual noises while driving, address them promptly—safety comes first.
