Mechanical problems
* Wear of clutches and steel discs
* Damage to planetary gear sets and differentials
* Deformation of shafts and bearings
* Automatic transmission fluid leak
Hydraulic faults
* Torque converter malfunction
* Clogged oil filters and channels
* Automatic transmission pump malfunction
* Damage to oil lines
Electrical faults
* Malfunction of the electronic control unit (ECU) of the automatic transmission
* Damage to automatic transmission sensors
*Short circuit or broken electrical wiring
Software problems
* Errors in automatic transmission software
* Incorrect calibration of the automatic transmission ECU
Factors influencing automatic transmission malfunctions
* Aggressive driving style
* Towing heavy loads
* Poor automatic transmission maintenance (delayed replacement of fluid and filter)
* Operating a vehicle in extreme conditions (mud, sand, water)
*Using unsuitable automatic transmission fluid
Signs of automatic transmission malfunctions
* Slipping and vibration when shifting gears
* Noise and shock when shifting gears
* Difficulty shifting gears
* Increased fuel consumption
* Automatic transmission fluid leak
* The automatic transmission fault indicator on the dashboard is on