Automatic Transmission Car Revs Gear Don’t Engage
Causes
- Low transmission fluid
- Dirty transmission fluid
- Faulty transmission filter
- Faulty shift solenoid
- Faulty torque converter
- Faulty transmission control module (TCM)
Symptoms
- The car revs but the gear doesn’t engage
- The car slips out of gear
- The car hesitates when shifting gears
- The car makes a grinding noise when shifting gears
Diagnosis
To diagnose the problem, you will need to:
- Check the transmission fluid level and condition
- Replace the transmission filter
- Test the shift solenoid
- Test the torque converter
- Test the transmission control module (TCM)
Repair
The repair for this problem will depend on the cause. If the problem is caused by low transmission fluid, you will need to add fluid to the transmission. If the problem is caused by dirty transmission fluid, you will need to replace the fluid. If the problem is caused by a faulty transmission filter, you will need to replace the filter. If the problem is caused by a faulty shift solenoid, you will need to replace the solenoid. If the problem is caused by a faulty torque converter, you will need to replace the torque converter. If the problem is caused by a faulty transmission control module (TCM), you will need to replace the TCM.
Prevention
You can help to prevent this problem by:
- Maintaining the proper transmission fluid level
- Changing the transmission fluid and filter regularly
- Avoiding sudden stops and starts
- Having the transmission serviced by a qualified mechanic
If you are experiencing this problem, it is important to have it diagnosed and repaired as soon as possible. Driving with a faulty transmission can lead to further damage to the transmission and other parts of the car.
