Possible causes of slight jerks when switching automatic transmissions:
Mechanical faults:
* Worn or damaged friction discs
* Contaminated or old transmission fluid
* Faulty shift solenoids
* Torque converter slip clutch
Hydraulic problems:
*Low transmission fluid level
* Clogged or faulty hydraulic filter
* Air bubbles in the hydraulic system
Electronic problems:
* Faulty gear selector position sensor
* Faulty Transmission Control Unit (TCU)
* Faulty connection in electrical wiring
Other possible reasons:
* Worn driveshafts or CV joints
* Incorrect adjustment of gear drive rods
* Worn engine or transmission mounts
Solution:
To eliminate jerks when switching automatic transmissions, it is recommended to take the following measures:
* Check the level and condition of the transmission fluid. Replace fluid and filter if necessary.
* Scan the transmission control system for fault codes and eliminate their causes.
* Inspect mechanical transmission components such as friction plates, solenoids, and torque converter clutch for wear or damage.
* Check the electrical wiring for signs of damage or poor connections.
* Check and, if necessary, adjust the gear drive rods.
* Check and replace worn engine or transmission mounts if necessary.
If the problem is not resolved, it is recommended that you contact a qualified mechanic for further diagnosis and repair.