Mechanical faults:
*Friction disc wear: This is the most common failure caused by excessive slippage or overheating.
* Damage to the torque converter: This will result in vibration, noise or slippage when shifting gears.
*Transmission malfunction: May result in difficulty shifting gears, slipping, or missing gears.
* Leaking transmission fluid: This can cause increased temperatures and damage to transmission components.
* Blocked oil passages: This can cause improper oil pressure and damage to components.
Electrical faults:
* Malfunction of speed sensors: They provide the automatic transmission with information about the speed of the vehicle and engine, which is necessary for proper gear shifting.
* Malfunctioning Solenoids: These solenoid valves control the flow of transmission fluid and affect gear selection.
* Malfunction of the automatic transmission control module (TCM): This module controls the operation of the automatic transmission and can cause various malfunctions if it malfunctions.
Software faults:
*TCM software errors: These can cause incorrect shifting, slippage, or other malfunctions.
* Software updates: Sometimes a software update is required to fix errors or improve the operation of the automatic transmission.
Other faults:
* Contaminated transmission fluid: Dirty or burnt-out transmission fluid can impair lubrication and shifting performance.
* Damage to the cooling radiator: This may cause the automatic transmission to overheat and damage components.
* Improper use: Driving in extreme conditions, towing heavy loads or lack of regular maintenance can cause premature transmission wear.