Why Does My Car Jerk Back and Forth When I Put It in Park?

Have you ever noticed your car jerking back and forth when you put it in park? This can be a common issue and is often caused by several underlying problems. In this article, we will explore the most common causes for this behavior and how to address them to ensure the safety and performance of your vehicle.

Common Causes of Jerking in Park

When your car jerks back and forth when you put it in park, it can be a frustrating experience. However, this symptom can be indicative of various issues, including transmission problems, engine mounts, drivetrain issues, high idle speed, brake system problems, and faulty sensors.

Transmission Issues

The transmission is a critical component of your vehicle, and issues with it can cause the car to jerk when you put it in park. This may be due to problems with the transmission fluid, such as low levels or contamination, which can result in rough shifting. Having a properly functioning transmission is essential for smooth operation and safety.

Engine Mounts

Engine mounts are designed to secure the engine and prevent excessive movement when shifting gears. If these mounts are worn or damaged, the engine may move more than it should, leading to a jerking sensation. Regular inspections and maintenance are crucial to ensure these mounts are in good condition.

Drivetrain Problems

Issues with the drivetrain, such as worn CV joints or a failing driveshaft, can also contribute to the jerking sensation when shifting into park. These components are essential for the transmission's proper operation and should be checked regularly to prevent problems and ensure safe driving.

Idle Speed

High idle speed can cause the car to lurch when you shift into park as the engine's RPMs drop suddenly. This is because the sudden change in speed can affect the vehicle's stability. Ensuring your car's idle speed is within the recommended range can help prevent this issue.

Brake System

If the brakes are not fully engaging or there's an issue with the brake system, it can lead to movement when shifting into park. Properly functioning brakes are essential for safe driving, so it's important to address any brake issues promptly.

Faulty Sensors

Some vehicles have sensors that help manage engine performance and transmission behavior. A faulty sensor could cause erratic behavior when shifting. It’s crucial to have these sensors checked regularly to ensure they are functioning properly.

What Should You Do?

If the problem persists, it's best to seek the help of a qualified mechanic. They can diagnose the issue and determine the root cause of the jerking behavior. Addressing the problem promptly can prevent further damage to your vehicle and ensure safe operation.

Additionally, engaging the parking brake firmly and moving the transmission to N (neutral) position when the car is stationary can help reduce the jerking sensation. This practice can also help in diagnosing the issue, as it can indicate whether there are problems with the drivetrain or other components.

Related Information and Tips

A car shaking, particularly when it starts to shut off, is often due to issues with the engine and transmission mounts. Ensuring these components are in good condition can help prevent jerking behavior and other issues. Here are some tips to help you maintain your vehicle:

Regularly check the condition of your engine and transmission mounts. Ensure the drivetrain components are functioning correctly. Keep the idle speed within the recommended range. Inspect the brake system regularly and address any issues promptly. Promptly replace faulty sensors.

By following these tips and seeking professional help when necessary, you can ensure your vehicle operates smoothly and safely, even when it's in park.

Conclusion

Dealing with a jerking car can be frustrating, but understanding the common causes can help you address the issue. Whether it's transmission problems, engine mounts, drivetrain issues, high idle speed, brake system problems, or faulty sensors, a thorough inspection by a qualified mechanic is key. Taking care of these components can extend the life of your vehicle and keep you safe on the road.