Causes and Solutions for Transmission Abnormal Noises

[StFrank]

Here are the specific causes and solutions for abnormal noises: 1. Bearing wear and damage. When bearings wear out, the gap increases and the fit precision decreases; when bearings are damaged, abnormal noises occur due to improper operation, which may even damage transmission components and worsen the fault. 2. Loose bolts on the transmission housing. Vibration during use can loosen the bolts, so regular inspections are necessary. 3. Excessive play between the gear lever and the shift fork groove in manual transmissions. 4. Long-term failure to replace automatic transmission fluid. The fluid thickens and loses fluidity, reducing the protective layer between components and causing direct friction, which accelerates mechanical wear and leads to abnormal noises. 5. Use of inferior automatic transmission fluid. Poor-quality fluid has weak heat resistance, oxidizes easily, and forms sludge and deposits that clog filters and oil passages, increasing internal friction and causing abnormal noises.