Possible reasons and solutions for the automatic transmission jerking when releasing the gas pedal:
1. Engine malfunctions:
* Problems with spark plugs or ignition coils
* Dirty or clogged fuel injectors
* Malfunctions in the air supply system
Solution: Carry out engine diagnostics, replace faulty components and carry out the necessary cleaning.
2. Transmission problems:
*Low or contaminated transmission fluid
* Worn or damaged friction discs, gears or bearings
* Malfunction of solenoids or control valves
*Transmission fluid pressure too low
Solution: Change the transmission fluid, repair or replace damaged components, check and repair solenoids or valves, and adjust fluid pressure if necessary.
3. Electronics faults:
*Faulty throttle position sensor
*Transmission control module (TCM) problems
* Damaged wiring or connectors
Solution: Diagnose the electronics, replace faulty sensors or modules, repair or replace damaged wiring or connectors.
4. Problems with crankshaft speed:
* Faulty vehicle speed sensor
* Timing belt or chain problems
* Failed crankshaft gears
Solution: Replace faulty sensors or components, check and adjust crankshaft speed.
5. Other possible reasons:
* Faulty torque converter
* Problems with engine or transmission mounting
* Damaged flywheel disc
Solution: Diagnose and repair or replace these components as necessary.
Important: Consult a qualified mechanic for diagnosis and repair, as transmission jerking may be a sign of a serious problem that can damage the transmission and lead to costly repairs.