Possible reasons for automatic transmission slipping:
*Low Transmission Fluid (ATF): Check ATF level and add if necessary.
* Contaminated ATF: Replace ATF and transmission filter.
* Faulty solenoids: Solenoids control gear shifting and faulty solenoids can cause slipping.
* Faulty torque converter: The torque converter transfers power from the engine to the transmission, and a faulty torque converter can cause slipping.
* Worn clutches: Clutches provide the friction to change gears, and their wear can cause slipping.
* Faulty Input Shaft Speed Sensor: The input shaft speed sensor tells the transmission how fast the engine is turning, and a faulty sensor can cause slipping.
* Faulty Output Shaft Speed Sensor: The output shaft speed sensor tells the transmission how fast the wheels are spinning, and a faulty one can cause wheel slip.
* Faulty Transmission Control Unit (TCU): The TCU controls the operation of the transmission and a malfunction can result in slippage.
Recommendations:
* Check ATF level.
* Replace ATF and transmission filter.
* Determine the fault code using an OBD2 scanner.
*Consult a qualified mechanic to diagnose and repair the problem.
Note: A slipping automatic transmission can cause serious damage to the transmission. If you notice slippage, do not delay diagnosis and repair.