Possible causes of a strong shock when changing gears in an automatic transmission:
Mechanical problems:
* Worn or dirty belts and clutches
* Problems with automatic transmission solenoids
* Torque converter problems
* Lack of ATF fluid
* Contaminated ATF fluid
Electrical problems:
*Faulty throttle position sensor
* Faulty speed sensor
* Faulty automatic transmission control unit
Other possible reasons:
* Engine problems (such as faulty spark plugs or ignition coils)
* Faulty engine or transmission mounts
* Incorrect shift cable adjustment
Diagnostics:
To determine the exact cause of shocks when shifting gears, it is recommended to diagnose the automatic transmission. This may include:
*Visual inspection
* Checking the ATF fluid level and its condition
* Reading fault codes
* Checking ATF fluid pressure
* Road test to observe the behavior of the transmission
Possible solutions:
Depending on the identified cause of the shocks, the following repair work may be required:
* Replacement of worn automatic transmission parts
* Flushing or replacing ATF fluid
* Replacement of sensors or solenoids
* Repair or replacement of torque converter
*Adjusting the gear shift cable
* Engine fault repair
* Replacement of engine or transmission mounts
It is important to consult a qualified mechanic to properly diagnose and repair your automatic transmission.