2. Faulty transmission: If adding transmission fluid does not resolve the issue, you may have a faulty transmission. This could be due to a variety of factors, such as worn-out gears, a faulty torque converter, or a damaged output shaft.
3. Faulty shift linkage: The shift linkage is responsible for connecting the gearshift lever to the transmission. If the shift linkage is damaged or misaligned, it can prevent the transmission from shifting into gear.
4. Faulty sensors: The transmission relies on various sensors to function properly. If one of these sensors is faulty, it can send incorrect information to the transmission control unit (TCU), which can cause the transmission to shift incorrectly or not at all.
5. Faulty TCU: The TCU is responsible for controlling the transmission. If the TCU is faulty, it can prevent the transmission from shifting into gear.
