Possible causes of shocks when shifting gears in a Kia Sorento automatic transmission:
Oil problems:
*Low transmission oil level
* Dirty or old oil
*Wrong oil type
Mechanical problems:
* Worn clutch pack
* Defective solenoids
* Torque converter malfunction
Electrical problems:
* Faulty speed sensor
*Wiring problems
* Errors in the transmission control module (TCM)
Software problems:
* Outdated TCM software
* Software problems
Other possible reasons:
* Dirty or clogged automatic transmission radiator
* Faulty engine or transmission mount
* Increased wear or damage to the driveshaft
Troubleshooting steps:
1. Check the oil level: Check the oil level in the automatic transmission with the engine warm and the gearbox idling. Add oil if necessary.
2. Change oil and filter: If the oil is dirty or old, replace it with new oil and filter. Use oil recommended by the manufacturer.
3. Scan for fault codes: Connect the OBD2 scanner and check for fault codes related to the automatic transmission.
4. Diagnose mechanical problems: If there are fault codes related to mechanical problems, contact a mechanic for further diagnosis and repair.
5. Update TCM Software: If there are software related trouble codes, update the TCM software at your dealer.
6. Check the engine and transmission mounts: Make sure the mounts are properly secured and not broken.
7. Check the driveshaft: Check the driveshaft for wear, damage, or improper balance.
8. Replace defective components: If defective components are found, such as clutch packs, solenoids or torque converter, they must be replaced.
It is important to see a qualified mechanic if you experience shifting noise in your Kia Sorento automatic transmission. These problems can get worse over time, leading to more serious and costly repairs.