What are the symptoms of gear grinding in a manual transmission?
2 Answers
If the gears in a car's transmission are damaged, there will be abnormal noises inside the transmission, and the car may experience difficulty shifting gears. Types of transmissions: There are two types of transmissions in cars: one is an automatic transmission, and the other is a manual transmission. The AT transmission is the most mature and widely used automatic transmission, which can also be referred to as a torque converter transmission. Dual-clutch transmission: The dual-clutch transmission is currently the most popular automatic transmission. This type of transmission is actually developed based on the manual transmission. The structure of a dual-clutch transmission is quite similar to that of a manual transmission.
A couple of days ago, my friend's car had this issue—when shifting gears, there was an extremely harsh metallic grinding noise, like filing iron with a rasp. You could feel obvious vibration and resistance in the gear lever, sometimes even a kickback. The key thing is, the noise doesn’t always appear; it’s most noticeable when starting the car cold, and downshifting from third to second gear is especially prone to getting stuck. After consulting a mechanic, we learned that this is actually caused by the transmission gear edges being forcibly worn down. If ignored for too long, those broken-off metal particles can mix into the transmission fluid and wear out other components. Now, he’s extra careful to fully depress the clutch when driving, afraid the whole transmission might fail and need replacement.
