* Low transmission fluid: Check the transmission fluid level and add more if necessary.
* Dirty transmission fluid: Change the transmission fluid and filter.
* Shift solenoid failure: A shift solenoid is a device that controls the shifting of the transmission. Replacing the faulty shift solenoid or solenoids may resolve the shifting problems.
* Faulty transmission speed sensor: The transmission speed sensor provides information to the transmission control module (TCM) about the vehicle's speed If the sensor is faulty , the TCM may be receiving incorrect information , resulting in improper shifting
* Vacuum leak: A vacuum leak can cause various drivability issues including shifting problems in vehicles equipped with vacuum -modulated transmissions
* Faulty throttle position sensor (TPS): The TPS provides information to the engine control unit (ECU) about the position of the throttle . If the TPS is faulty the TCM may not receive the correct information resulting in improper gearshift timing.
