- Defective transmission: The transmission may not be properly engaging the drive gear, causing the car to stall when in drive but run in neutral.
- Low transmission fluid: Lack of sufficient transmission fluid can cause the transmission to malfunction and stall the vehicle.
- Faulty torque converter: The torque converter transmits power from the engine to the transmission, and a malfunctioning torque converter can cause the car to stall.
- Electrical issues: Electrical problems, such as a faulty neutral safety switch or a bad ignition switch, can prevent the car from starting in drive but allow it to run in neutral.
Troubleshooting steps:
1. Check the transmission fluid: Ensure the transmission fluid level is correct and that the fluid is clean and free of debris. Add or change the fluid if necessary.
2. Inspect the transmission: Look for any signs of damage or leaks on the transmission case or lines. If you notice anything unusual, have the transmission inspected by a professional mechanic.
3. Test the torque converter: You can do this by disconnecting the transmission line from the torque converter and observing if fluid comes out. If fluid doesn't come out, the torque converter may be faulty.
4. Check for electrical problems: Inspect the neutral safety switch and the ignition switch for damage or loose connections. Replace any faulty components.
If you are unable to identify and resolve the problem, it's best to have your car diagnosed and repaired by a professional mechanic.
