Normal sounds when shifting an automatic transmission
*Slight clicking or knocking noise: Occurs when shifting from Park (P) to Drive (D) or vice versa.
* Mild hum or buzzing noise: Accompanies gear changes during acceleration.
*Slight vibration: May be felt during shifting, especially when overloading or towing.
Abnormal sounds that require attention
* Severe shock or shock: When shifting gears, indicating wear or damage to the transmission.
* Slipping or Slipping: A buzzing or vibration sound coming from the transmission indicating wear on the clutch or other internal components.
* Grinding or squealing: A metallic noise that occurs when shifting gears, indicating worn or damaged gears.
* Knocking or rumbling noises: When shifting from one gear to another, indicating serious mechanical problems.
*No shift sound: May indicate a failed shift solenoid or other electrical problem.
Other sounds
* Clicking or popping noise when shifting into park: Typically caused by the engine’s response to stopping and is not a sign of trouble.
* Increased engine speed without shifting: Indicates slippage or transmission failure.
* Cricket-like noise: May be caused by resonance in the exhaust system or other parts of the drivetrain.