Why Does an Automatic Transmission Car Make Noise When Shifting Gears?

[DeJanelle]

Here are the reasons why an automatic transmission car makes noise when shifting gears: Shifting gears when the car is not completely stopped: If you shift to P gear before the car comes to a complete stop, the P gear lock hook inside the transmission will hit the gear, making a clicking sound. Incorrect operation sequence when parking on a slope: For automatic transmissions, the P gear relies on the lock hook to secure the gear and keep the car stationary. When parking on a slope, you should first engage the handbrake and then shift to P gear, allowing the handbrake to bear the downward force of the vehicle. Worn transmission gears: The transmission is a precision component, and the gears best reflect its precision. However, due to their tight meshing, wear is inevitable. Over time, larger gaps will form between the gear teeth, causing noise when shifting gears.