Possible reasons for automatic transmission kicking:
Transmission fluid problems:
*Low fluid level
* Contaminated or burnt-out liquid
* Wrong fluid type
Problems with mechanical components:
* Worn clutches
* Slip torque converter
* Damaged planetary gears or shafts
* Malfunction of solenoids
* Malfunction of the electronic control unit (ECU)
Electrical problems:
* Faulty speed sensors
* Damaged wiring
*Transmission control module problems
Other possible reasons:
* Gear shift lock
* Improper use (such as sudden acceleration or towing heavy loads)
* Poor maintenance
* Poor quality parts and assembly
Diagnosis and troubleshooting:
To determine the exact cause of automatic transmission kicking, professional diagnostics are required. Typically a mechanic will do the following:
* Checks the level and condition of the transmission fluid
*Connects OBD-II scanner to read trouble codes
* Conducts a visual inspection of the transmission for leaks or damage
* Tests the operation of solenoids and other electronic components
* It may be necessary to remove and disassemble the transmission for a more thorough diagnosis
After diagnosis:
* Mechanic will repair or replace faulty components
* Replace transmission fluid if necessary
* Reprograms or replaces ECU if necessary
* Will perform a road test to ensure kicks are corrected