Possible causes of jerking when shifting gears in an automatic transmission:
Mechanical problems:
* Worn or damaged clutch discs
* Faulty oil pump or filter
* Worn or dirty solenoids
* Torque converter problems
* Malfunction of throttle position or speed sensors
Electrical problems:
* Malfunction in the automatic transmission control module (TCM)
* Faulty transmission fluid temperature or engine speed sensors
*Wiring problems
Transmission fluid problems:
*Low transmission fluid level
* Using the wrong transmission fluid
* Contaminated or old transmission fluid
Other possible reasons:
* Worn or damaged driveshaft
* Engine or ignition system malfunction
* Malfunction of the air conditioning or steering system
Diagnosis and elimination:
To correctly diagnose and eliminate jerking when shifting automatic transmission gears, you must:
* Check the level and condition of the transmission fluid.
* Read fault codes using a diagnostic scanner.
* Test drive the vehicle using diagnostic equipment to monitor sensor readings and transmission operation.
* If necessary, disassemble the transmission and inspect internal components for wear or damage.
Care Tips:
* Check the level and condition of the transmission fluid regularly.
*Follow recommended transmission fluid change intervals.
*Use a high quality transmission fluid recommended by the manufacturer.
* Avoid aggressive driving and sudden gear changes.
* Maintain your vehicle regularly, including replacing air and fuel filters.