The gearbox synchronizer is an important part of the automobile gearbox. Its main function is to ensure the smooth meshing of gears during the shifting process and improve the smoothness and reliability of shifting. If the gearbox synchronizer is broken, it will show some obvious symptoms. The following are the specific situations:

1. Absrtact: When the synchronizer is damaged, abnormal noise may occur during shifting. This kind of abnormal noise is usually manifested as a noise or click when shifting gears, especially when starting or accelerating.
2. Difficulty in shifting: Damage to the synchronizer may cause the shifting to be unsmooth, and the driver may feel a sense of resistance or stuck when shifting. Especially when shifting at low or high speeds, this feeling is more obvious.
3. Transmission slippage: Synchronizer damage may lead to incomplete meshing of internal gears of the transmission, resulting in transmission slippage. In this case, the vehicle may feel a lack of power or an unstable speed.
4. Decreased fuel economy: Difficulties in shifting and transmission slippage caused by damage to the synchronizer will increase the fuel consumption of the vehicle and lead to a decrease in fuel economy.
5. Vehicle performance degradation: Synchronizer damage may also affect the overall performance of the vehicle, including acceleration performance, driving stability and power output.

When the above symptoms are found, they should be checked and repaired in time. If the synchronizer is severely damaged, a new synchronizer or gearbox may need to be replaced. Because the damage of the synchronizer may cause more serious mechanical problems, and may even lead to the scrapping of the gearbox.

The key to prevent synchronizer damage lies in regular maintenance and inspection. Keeping the transmission oil clean and sufficient, and regularly changing the transmission oil according to the manufacturer's recommendations can extend the service life of the synchronizer. In addition, avoiding rough driving, such as frequent rapid acceleration and sudden braking, can also reduce the wear of the synchronizer.

In short, it is very important for the driver to understand the working principle of the gearbox synchronizer and the symptoms of damage. When the synchronizer is found to be damaged, it should be repaired in time to avoid more serious mechanical problems. Through regular maintenance and inspection, the service life of the synchronizer can be extended to ensure the performance and safety of the vehicle.