Possible causes and solutions:
1. Low transmission fluid level
* Check the fluid level.
* If necessary, add fluid recommended by the manufacturer.
2. Contaminated transmission fluid
* Replace fluid and filter.
3. Transmission fluid level is too high
* Drain off excess liquid.
4. Faulty solenoids
* Solenoids control the gears.
* Diagnose and replace faulty solenoids.
5. Faulty input shaft speed sensor
* The sensor tells the engine control unit (ECU) the rotation speed of the input shaft.
* Replace the faulty sensor.
6. Faulty output shaft speed sensor
* The sensor tells the ECU the rotation speed of the output shaft.
* Replace the faulty sensor.
7. Faulty gear selector
* The gear shift lever tells the ECU the selected gear.
* Check and repair or replace the faulty selector.
8. Faulty Transmission Control Unit (TCU)
* The TCU controls the operation of the transmission.
* Diagnose and replace faulty TCU.
9. Mechanical problems
* Transmission overheating
* Worn or damaged gears, bearings or clutches
Other tips:
* Reset the ECU by disconnecting the battery for 30 minutes.
* Check the wiring and connectors going to the transmission.
*Consult a qualified mechanic for diagnosis and repair.
Note: Ignoring transmission kicks can result in further damage and costly repairs. It is recommended to seek professional help immediately.