Possible causes of jerking when switching automatic transmission in Hyundai:
Mechanical problems:
* Clutch slippage
* Clogged automatic transmission valves
* Worn or damaged solenoids
* Problems with valve body
Electrical problems:
* Malfunction of sensors (speed, engine speed)
* Malfunctions in the electronic control unit (ECU)
*Wiring problems
Software problems:
*ECU calibration failure
* Outdated software
* Incorrect settings
Wear and maintenance:
* Low or poor quality transmission fluid
* Worn spark plugs or wires
* Problems with glow plugs (for diesel engines)
Other reasons:
* Clogged catalytic converter
* Engine oil pump problems
* The automatic transmission filter is clogged or is about to become clogged
Diagnosis and troubleshooting:
1. Check the level and quality of the transmission fluid.
2. Carry out diagnostics using an OBD2 scanner to identify fault codes.
3. Check the operation of the solenoids and valves of the automatic transmission.
4. Check the condition of clutches and friction clutches.
5. Update the ECU software (if necessary).
6. Replace spark plugs or wires (if necessary).
7. Check and replace glow plugs (for diesel engines).
8. Check and clean the catalytic converter (if necessary).
9. Check the engine oil pump and replace it if necessary.
10. Replace the automatic transmission filter.
Attention: For accurate diagnosis and troubleshooting, it is highly recommended that you contact a qualified mechanic who specializes in transmission repair.