Possible causes of sounds from the automatic transmission when shifting gears:
Mechanical problems:
* Wear or damage to gearbox parts: gears, bearings, synchronizers.
*Low or dirty transmission oil: Insufficient lubrication can lead to increased wear and noise.
* Torque converter problems: worn or faulty lockup clutch.
* Pump failure: Low oil pressure can affect transmission performance and cause noise.
Electrical problems:
* Malfunctioning solenoids: Gear shifting may be difficult or noisy.
* Gear Shift Position Sensor Failure: The ECU does not receive correct gear information, resulting in incorrect shifting and noise.
* Electrical wiring fault: An open or short circuit in the wiring harness can prevent transmission operation.
Other reasons:
* Worn or damaged engine and transmission mounts: Vibration from the engine or transmission can be transmitted to other parts of the vehicle and create noise.
* Dirty transmission oil filter: Filter deposits can restrict oil flow and cause increased noise.
* Using the wrong transmission fluid: The wrong fluid may not provide sufficient lubrication and cooling.
Recommendations:
*Consult a qualified mechanic to diagnose the problem.
* Check the level and condition of the transmission oil regularly.
* Avoid sudden gear changes and vehicle overloads.
*Follow the transmission maintenance intervals specified in the owner’s manual.