How to Solve the Squeaking Noise When Engaging Reverse Gear in a Sedan?
2 Answers
If you engage the reverse gear without bringing the car to a complete stop, it can easily lead to gear grinding. Therefore, when shifting into reverse, make sure to firmly press the brake and bring the car to a full stop before engaging the gear. When depressing the clutch to shift gears, ensure the clutch is fully pressed down. Engaging reverse gear while the clutch is still partially engaged can also cause gear grinding. When reversing, avoid excessive speed and refrain from aggressively pressing the accelerator for sudden acceleration, as this can cause significant damage to the straight-cut gears. Additionally, the power transmission of straight-cut gears is very direct and lacks smoothness, so reversing at high speeds can cause considerable discomfort to passengers inside the car.
I've been repairing cars for nearly twenty years, and this kind of reverse gear noise is all too common. Worn transmission gears are the main culprit, especially when the synchronizer is damaged, causing metal friction that results in a squeaking sound. Not fully depressing the clutch before shifting gears can accelerate the wear. Last time, a car owner kept hearing metal grinding noises when reversing, and upon disassembly, we found grooves worn into the reverse gear. It's recommended to fully depress the clutch for at least three seconds before shifting. If the noise persists, check if the transmission oil has turned black with metal shavings. Don't think this is a minor issue—last time, a car owner delayed until the gears started grinding, and the repair cost went up by 4,000 yuan.
