Possible reasons for automatic transmission slipping when changing gears:
Problems with friction linings:
* Wear or burning of friction linings
* Contamination or foreign objects on the pads
Problems with torque converter:
* Wear of turbine or pump blades
* Clogged or blocked torque converter
* Torque converter lock-up malfunction
Solenoid problems:
* Faulty gear shift solenoids
* Dirty or blocked solenoids
Oil problems:
*Low oil level
* Contaminated or old oil
* Wrong brand of oil
Problems with the hydraulic block:
* Clogged or blocked valve body channels
* Malfunction of oil pressure regulator
ECU problems:
* Malfunction of engine speed or engine speed sensors
* Errors in ECU software
Other possible reasons:
* Worn or damaged transmission spline
*Differential fault
* Problems with wheel drives
Recommended actions:
* Check the level and condition of the oil in the automatic transmission
* Scan your vehicle for fault codes
* Check friction linings and torque converter for wear or damage
* Test solenoids and hydraulic block
* Check the correct operation of the sensors
*Update ECU software if necessary
Important:
A slipping automatic transmission can cause serious damage to the transmission. If you experience slipping, immediately contact your auto repair shop for diagnosis and repair.