Possible reasons:
* Torque converter malfunction:
* Wear of friction discs
* Transmission fluid contamination
* Torque converter lock-up malfunction
* Transmission fluid problems:
*Low fluid level
* Loss of fluid viscosity
* Fluid contamination
* Sensor malfunction:
* Input shaft speed sensor
* Output shaft speed sensor
* Mechanical problems:
* Wear of gears and bearings in automatic transmissions
*Differential fault
* Problems with the electronic control unit (ECU):
* Malfunction of solenoids
* Faulty electronic circuits
Diagnostics and repair:
* Check the level and condition of the transmission fluid.
*Connect a scanner to check error codes.
* Carry out a test drive with a connected scanner to analyze the operating parameters of the automatic transmission.
* If necessary, disassemble the automatic transmission to inspect and replace damaged parts.
*Update the ECU firmware if necessary.
Adviсe:
*Change transmission fluid regularly according to manufacturer’s recommendations.
* Avoid aggressive driving, which can overload the automatic transmission.
* When the first signs of twitching appear, contact a car service for diagnosis and repair.