Common signs of problems with an automatic transmission:
* Gear slipping: The feeling that the car is accelerating slowly or the engine speed is increasing but the speed remains the same.
* Jerks or jerks when shifting gears: Gears shift abruptly or jerkily.
* Stuck in a certain gear: The car remains in one gear and does not shift.
*Trouble with shifting gears into or out of gear: The gear selector may not shift between modes.
*Transmission Fluid Leak: Visible red or clear fluid leaking from the transmission housing.
* Strange noises or vibrations: Transmission squealing or humming noise, vibration when shifting gears.
* Burning smell: May indicate overheating or a transmission fluid leak.
Specific problems for different types of automatic transmissions:
Torque converter automatic transmissions:
* Torque Converter Slip: The torque converter lock-up clutch is worn or damaged.
* Clogged oil filter: Restriction of transmission fluid flow.
*Damage to input or output shaft: Broken drive or damaged seals.
Variable automatic transmission (CVT):
* Belt or chain slippage: Worn or stretched CVT belt or chain.
* Damage to cones or shafts: Incorrect operation or wear of CVT components.
* Problems with the control module: Malfunctions in the electronic control of the variator.
Robotic automatic transmission (DCT):
* Clutch faults: Clutches slipping or sticking.
* Clutch Actuator Problems: Malfunctions of the mechanical or electronic components that control the clutches.
* Malfunctions of the electronic control unit: Failures in the electronic control of the transmission.