Changed Transmission Fluid Now Car Won’t Start

Possible Causes

1. Overfilled transmission fluid: When you overfill the transmission, it can cause the fluid to foam and lose its ability to lubricate and cool the transmission components. This can lead to overheating and damage to the transmission, which can prevent your car from starting.
2. Incorrect transmission fluid type: Using the wrong type of transmission fluid can also cause problems. Different types of transmissions require different types of fluid, and using the wrong type can damage the transmission and prevent your car from starting.
3. Damaged transmission filter: The transmission filter helps to remove contaminants from the transmission fluid. If the filter is damaged or clogged, it can restrict the flow of fluid and cause the transmission to overheat and fail.
4. Faulty transmission pump: The transmission pump is responsible for circulating the transmission fluid throughout the transmission. If the pump fails, it can starve the transmission of fluid and cause it to overheat and fail.
5. Electrical problems: Electrical problems can also prevent your car from starting after you change the transmission fluid. These problems can include a faulty starter, a bad battery, or a loose or damaged wiring connection.

Troubleshooting

If your car won’t start after you change the transmission fluid, there are a few things you can do to troubleshoot the problem:

1. Check the transmission fluid level: The first thing you should do is check the transmission fluid level. If the fluid is overfilled, you will need to drain some of the fluid until the level is correct.
2. Check the transmission fluid type: Make sure that you are using the correct type of transmission fluid for your car. You can find the correct type of fluid in your car’s owner’s manual.
3. Inspect the transmission filter: If the transmission filter is damaged or clogged, you will need to replace it. You can find the transmission filter in your car’s owner’s manual.
4. Test the transmission pump: To test the transmission pump, you will need to disconnect the pump from the transmission and turn the engine over. If the pump is working properly, you should see fluid flowing out of the pump. If you do not see any fluid flowing, the pump may be faulty and will need to be replaced.
5. Check for electrical problems: If you have ruled out all of the other possible causes, you may need to check for electrical problems. You can do this by checking the battery, starter, and wiring connections.

If you are unable to troubleshoot the problem yourself, you should take your car to a mechanic for diagnosis and repair.

Conclusion

If your car won’t start after you change the transmission fluid, it is important to troubleshoot the problem as soon as possible to prevent further damage to your transmission. By following the steps outlined in this article, you can help to identify the cause of the problem and get your car back on the road.