- Low transmission fluid level: Check the transmission fluid level and add more if necessary.
- Worn-out transmission filter: A dirty or clogged transmission filter can restrict fluid flow and cause the transmission to slip. Replace the transmission filter if it is dirty.
- Faulty shift solenoid: A shift solenoid is an electrical component that controls the shifting of gears. A faulty shift solenoid can cause the transmission to slip or not shift properly. Test the shift solenoids and replace any that are faulty.
- Damaged torque converter: The torque converter is a fluid coupling that connects the engine to the transmission. A damaged torque converter can cause the transmission to slip. Inspect the torque converter for damage and replace it if necessary.
- Weak transmission pump: The transmission pump circulates fluid throughout the transmission. A weak transmission pump can cause the transmission to slip due to insufficient fluid pressure. Test the transmission pump and replace it if necessary.
- Failed governor pressure sensor: The governor pressure sensor monitors the hydraulic pressure in the transmission and sends a signal to the transmission control module (TCM). If the sensor fails, the TCM will not be able to properly control the transmission and it may slip. Test the governor pressure sensor and replace it if necessary.
- Faulty transmission control module (TCM): The TCM is the electronic control unit that controls the operation of the transmission. A faulty TCM can cause the transmission to slip or not shift properly. Scan the TCM for trouble codes and replace it if necessary.
