Possible causes of noise when switching an automatic transmission:
1. Low level or problems with transmission fluid (TF)
* Insufficient fluid levels can cause insufficient pressure and lubrication, resulting in noise.
* Dirty or old fluid can also interfere with transmission performance and cause noise.
2. Dirty or faulty oil filter
* A dirty filter restricts fluid flow, leading to oil starvation and noise.
3. Worn or faulty friction discs
*Friction discs wear out over time and can cause vibration or slipping, resulting in noise.
4. Faulty solenoids or sensors
* Solenoids are responsible for shifting gears, and faulty sensors can provide incorrect data, resulting in harsh shifts and noise.
5. Faulty torque converter
* The torque converter is responsible for transferring power from the engine to the transmission, and malfunctions can cause noise or vibration.
6. Problems with the drive shaft
* A faulty or unbalanced drive shaft can cause noise and vibration when accelerating or turning.
7. Worn or faulty bearings
* Worn bearings may create noise or hum when driving or shifting gears.
8. Defects in the gearbox housing
* Cracks or other defects in the housing may cause fluid leaks and noise.
9. Electrical problems
* Faulty electrical components, such as wiring harnesses or sensors, can disrupt the transmission and cause noise.
10. Other reasons
*Loose or faulty transmission mount
* Incorrectly installed or faulty engine mount
Note: Noises when shifting gears may indicate serious problems that require professional diagnosis and repair. If you notice any unusual noises, it is recommended that you contact a qualified mechanic as soon as possible.