
Nissan Tiida's transmission may produce a whining noise due to reasons such as bearing wear, transmission component wear, insufficient lubricant, or loose housing bolts. Bearing Wear: Worn bearings lead to increased clearance and reduced fitting precision; damaged bearings cannot operate normally, resulting in abnormal noises and potentially causing damage to transmission components, thereby escalating the issue. Transmission Component Wear: Excessive clearance between worn gears or newly replaced gears and the original gears. Insufficient Lubricant: This leads to poor lubrication. Suitable lubricant should be replaced; otherwise, it will accelerate transmission wear and shorten its service life. Loose Housing Bolts: Vibrations during use can loosen bolts, so regular inspections are necessary.

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