What Causes the Abnormal Noise When Starting the Car in First Gear?
2 Answers
Reasons for abnormal noise when starting the car in first gear: component noise and prolonged use of transmission oil. Detailed explanations of the reasons are as follows: Component noise: The gear shifting mechanism of a car consists of the gear lever, cables, gear selection and shifting mechanisms, shift forks, and synchronizers. The noise from these components is relatively minor. Prolonged use of transmission oil: Extended use of transmission oil can lead to the formation of sludge, increasing the wear on friction plates and other components. Wear on these parts can cause malfunctions resulting in abnormal noise. If the noise during gear shifting is minor and comes from near the gear lever, it is a normal sound from the gear shifting mechanism. However, if there is a clicking sound during gear shifting, it is caused by gear impact failure in the transmission.
As someone who often helps friends with car repairs, I've encountered the issue of abnormal noises when starting in first gear quite a few times. The most common cause is worn clutch plates, which produce a squeaking sound under heavy load during startup, resembling metal friction. Worn transmission gears can also lead to a clicking noise in first gear, especially in older vehicles that haven't been maintained for years. Loose drive shaft connections or damaged bearings can produce similar symptoms. Don't underestimate it—abnormal noises indicate excessive component fatigue. If left unaddressed, it could lead to complete clutch burnout or even total transmission failure, significantly increasing repair costs. When starting the car, I recommend observing whether the abnormal noise is accompanied by vibration—if so, the problem is more severe. Start with simple checks: inspect the clutch fluid and transmission oil levels; if they're low, try topping them up. Preventive measures include changing the transmission oil every 20,000 kilometers and developing a habit of gentle starts, avoiding sudden throttle inputs.
