What Causes the Noise When Shifting Gears in an Automatic Transmission?

1 Answers
AlyssaFitz
09/05/25 2:46am
The reasons for noise when shifting gears in an automatic transmission are as follows: 1. Large valve clearance when the engine is cold: Poor lubrication can cause noise during gear shifting between cold and warm engine states, lasting about 3 minutes, but this is a normal phenomenon. 2. Issues caused by parking on a slope: If you engage the P (Park) gear before applying the handbrake when parking on a slope, the vehicle's weight will be entirely on the P gear due to inertia, leading to noise when shifting gears. However, if you apply the handbrake first, the handbrake will bear the weight, and no noise will occur. 3. Transmission problems: Wear and tear in the transmission, such as a loose driveshaft, worn differential, worn output shaft inside the transmission, worn transmission gears, or faulty shifting mechanism, require immediate attention. It is essential to visit a 4S shop or a professional auto repair shop for technician repairs.
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