How to Determine Transmission Abnormal Noise?

1 Answers
Jasmine
07/29/25 11:27am
When the transmission inside the car makes a "rustling" sound during driving, it indicates abnormal noise from the transmission. Causes of transmission abnormal noise: 1. Long-term failure to replace transmission oil: Automatic transmission fluid should be replaced every 2 years or 40,000 kilometers, while manual transmission fluid requires replacement every 3 years or over 60,000 kilometers. Prolonged use of transmission oil leads to contamination with sludge and impurities, making it thicker and reducing fluidity, which intensifies friction between components and generates abnormal noise. 2. Presence of gear debris in the gears: When the abnormal noise is rhythmic, try increasing the throttle. In this case, the transmission needs inspection and timely repair or replacement of worn parts. 3. Use of poor-quality transmission oil: Inferior transmission oil has poor performance, is prone to oxidation, and forms sludge and residues that can clog filters and oil passages, increasing friction inside the transmission and causing abnormal noise.
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