What Causes the Noise When Shifting Gears in Fast Gearbox?
2 Answers
Gearbox noise during shifting is caused by damaged synchronizers, which lose their synchronization function, but the transmission can still continue to operate. Definition: The vehicle's gearbox is one of the main components of the automotive transmission system. Due to the highly varied actual usage conditions of vehicles, it is necessary for the driving force and speed to be adjustable over a wide range. Additionally, since piston engines, which are widely used today, produce relatively low output torque, a gearbox is incorporated into the transmission system. Precautions: Sludge in dirty oil can hinder the smooth movement of valves in the valve body. Impaired movement affects oil pressure control, leading to abnormal gearbox operation.
I drive heavy trucks and have been running long-distance routes for over a decade. I've encountered quite a few cases of gear grinding noise with Fast transmissions. The most common cause is incomplete clutch disengagement leading to gear collision sounds, which sound like clunking. Another issue is worn synchronizers, making gear grinding noises particularly noticeable during shifting. Insufficient or contaminated transmission fluid causing poor lubrication can also create noise. I always make sure to fully depress the clutch and regularly check fluid levels, changing the oil approximately every 20,000 kilometers. If the noise persists, it's best to get it checked at a service station to prevent gear damage. Transmission problems not only cost money but also affect driving safety - safety comes first when operating heavy trucks.
