What Are the Reasons for Gearbox Shifting Noise?
2 Answers
The reasons for gearbox shifting noise are: 1. Damaged transmission housing; 2. Broken gear surface; 3. Improper transmission assembly. Methods for maintaining an automotive gearbox: 1. Replace automatic transmission fluid every 12 months or 20,000 kilometers; 2. Avoid coasting in neutral; 3. Regularly check the fluid level; 4. Avoid skipping gears when upshifting; 5. Do not force the transmission into neutral; 6. Do not shorten the idle warm-up time; 7. Avoid gear grinding when shifting; 8. Clean the transmission; 9. Avoid starting and driving without warming up the vehicle; 10. Perform regular maintenance on the automatic transmission. The functions of the gearbox are: 1. Change the transmission ratio; 2. Expand the torque and speed of the drive wheels; 3. Enable the vehicle to reverse; 4. Facilitate gear shifting or power output.
The transmission makes noise when shifting gears. I've been driving for over 20 years and have experienced quite a bit. The most common reason is not fully depressing the clutch when shifting a manual transmission. If you don't press it down firmly, the gears will make a clunking sound. Worn synchronizers are another major cause—they're responsible for smooth gear engagement, and when they fail, noise occurs. Old or insufficient transmission fluid reduces lubrication, increasing gear friction and resulting in noise. Poor driving habits, like forcing gears or shifting too quickly, can also cause internal damage. Other possibilities include damaged gears or loose connecting components. I remember once ignoring the noise, and it ended up costing me a fortune to replace the entire transmission. So, if you hear unusual sounds, check the fluid level immediately. If that's fine, take it to a professional repair shop—safety should never be compromised. Regular maintenance can prevent these issues, such as changing the fluid every 40,000–50,000 kilometers, which helps a lot.
