What Causes the Abnormal Noise in Automatic Transmission?

[WilliamAnn]

Here are the specific reasons for abnormal noise in automatic transmission: Bearing wear and damage: When bearings wear out, the gap increases and the fit precision decreases; when bearings are damaged, they cannot operate normally, resulting in abnormal sounds and even causing damage to transmission components, leading to further malfunctions. Long-term failure to replace transmission fluid: The transmission fluid becomes thick and loses its fluidity, which means there is no protective layer between components, leading to direct friction that exacerbates mechanical wear and causes abnormal noise. Using inferior transmission fluid: Inferior transmission fluid has poor heat resistance and is prone to oxidation, forming sludge and residue that can clog filters and oil passages, increasing friction between internal components of the automatic transmission and causing abnormal noise in the vehicle.