- Low transmission fluid level: Check the transmission fluid level to make sure that it is full. Add fluid as necessary.
- Faulty shift linkage: The shift linkage is the component that connects the gear shift lever to the transmission. If the shift linkage is damaged or worn, it may not be able to move the transmission into the desired gear.
- Faulty transmission control module (TCM): The TCM is the electronic component that controls the transmission. If the TCM is faulty, it may not be able to send the correct signals to the transmission to shift gears properly.
- Faulty solenoid pack: The solenoid pack is a set of valves that control the flow of hydraulic fluid in the transmission. If the solenoid pack is faulty, it may not be able to direct the hydraulic fluid properly, which can prevent the transmission from shifting gears.
- Faulty gear: If one of the gears in the transmission is damaged, it may not be able to engage properly, which can prevent the transmission from shifting into the desired gear.
