What Are the Causes of Friction Noise in the Transmission?
1 Answers
Transmission friction noise can be attributed to the following reasons: 1. Wear noise: If the noise originates from the transmission during driving, it might be due to worn transmission bearings or gears, or bearing spots. 2. Speed change-related noise: If there is abnormal noise from the transmission during acceleration and gear shifting, it could indicate the presence of metal particles in the transmission fluid, suggesting excessive wear of components like brake bands and clutches inside the transmission. Here are specific solutions: 1. Check if the noise is speed-related: During analysis and judgment, pay attention to whether the noise is related to specific speeds, such as some planetary gears being more noticeably noisy around 50Km/h. Also, determine if it is related to certain gears, which is crucial for diagnosing transmission issues. If noise occurs in a specific gear, it is definitely related to the components affecting that gear's transmission. 2. Avoid gear grinding during shifting: Gear grinding refers to the noise that easily occurs during gear shifting. If this noise persists for a long time during gear changes, it can damage the ratchet teeth on the synchronizer ring.