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Why does your car make a loud whiny noise especially when turning?

Several factors can contribute to a loud whining noise while turning in your car. Here are some common reasons:

1. Power Steering System Issues:**

- Low Power Steering Fluid: Insufficient or low power steering fluid can cause the pump to work harder, leading to a whining noise. Check your power steering fluid reservoir; if the level is low, top it up as per the recommended fluid type for your car.

- Faulty Power Steering Pump: If the power steering pump itself is damaged or failing, it can produce a whining noise. This can be caused by wear and tear over time or internal component failure.

2. Transmission Problems:

- Low Transmission Fluid: Insufficient transmission fluid can lead to increased friction and strain on the transmission, causing a whining sound. Check the transmission fluid level and add more if needed.

- Worn or Damaged Gears: Worn-out or damaged gears within the transmission can create a whining noise. This issue typically occurs in older vehicles or those with high mileage.

3. Wheel Bearing Failure:

- Worn Wheel Bearings: Faulty wheel bearings can generate a whining noise when the vehicle is turning. Wheel bearings allow the wheels to rotate smoothly, and when they wear out, they can cause excessive friction, resulting in the noise.

4. Worn or Damaged Belts:

- Serpentine Belt: The serpentine belt drives multiple components in your engine compartment, including the power steering pump and alternator. If the belt is loose, worn, or damaged, it can create a whining sound when the components it drives are engaged (such as when turning the steering wheel).

- Alternator Belt: A failing or loose alternator belt can also cause a whining noise, as it powers the electrical system of your car.

5. Differential Problems:

- Low Differential Fluid: Inadequate differential fluid in the rear axle of your car can lead to whining noise, especially during turns or when accelerating.

6. Incorrect Tire Pressure:

- Underinflated Tires: Driving on underinflated tires can generate a whining noise due to increased rolling resistance and friction with the road. Make sure to maintain the recommended tire pressure for your car.

7. Worn Steering Rack:

- Damaged Steering Rack: A faulty steering rack can produce a whining sound during turns due to worn internal components or issues with the steering rack's seals.

It's important to identify the specific cause of the whining noise to ensure proper repair or replacement of the faulty components. If the noise is persistent or worsens, it's advisable to have your vehicle inspected by a professional mechanic or automotive technician for accurate diagnosis and resolution of the issue.