Mechanical problems
* Worn or damaged transmission parts such as friction discs, bands or bearings.
* Torque converter clutch slippage due to wear or malfunction.
* Low level or poor quality transmission fluid.
* Clogged or faulty transmission filter.
Electrical problems
* Faulty solenoids that control gear shifting.
* Wiring problems such as breaks or short circuits.
* Malfunctions in the electronic transmission control module (TCM).
Software problems
* Outdated or corrupted TCM software.
* Mismatch between TCM software and transmission components.
Other reasons
* Worn or damaged engine or transmission mounts.
* Faulty throttle position sensor or speed sensor.
* Low voltage in the on-board network.
* Excessive load on the transmission, such as towing heavy loads or driving at high speeds.
Additional factors that may contribute to twitching:
* Driving in cold temperatures when transmission fluid is thick.
* Late or improper transmission maintenance.
* Using unsuitable transmission fluid.