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What would cause a grinding or rattling sound when accelerating from stop turning?

Several issues could cause grinding or rattling noises when accelerating from a stop and turning. Here are some possibilities:

1. Issues with Constant Velocity (CV) Joints/Axle:

- Worn CV joints or damaged axle components can produce grinding or clicking noises when making sharp turns while accelerating. They transfer power from the transmission to the wheels and can wear out over time.

2. Loose or Damaged Wheel Bearing:

- Loose or worn-out wheel bearings can create grinding or rumbling sounds when turning and accelerating due to excessive play or damage.

3. Worn Differential:

- If your vehicle has a differential (a device that allows the wheels on different sides to rotate at different speeds while turning), a worn differential could cause grinding or rattling noises during acceleration and turning.

4. Damaged Engine or Transmission Mount:

- If the mounts that hold your engine or transmission in place are damaged or loose, they can cause components to move excessively and create grinding sounds.

5. Brake Issues:

- In some cases, worn brake pads or rotors can produce grinding or squealing noises when braking or accelerating.

6. Faulty Power Steering Components:

- If your vehicle has power steering, issues with the power steering pump, lines, or rack could lead to grinding or whining sounds when turning.

7. Issues with the Driveshaft:

- In some vehicles, a worn-out or damaged driveshaft can create grinding or rattling sounds during acceleration and turning.

8. Worn Ball Joints or Tie Rods:

- Worn-out ball joints or tie rods (components that connect the wheels to the steering system) can cause knocking or rattling sounds when turning.

9. Loose Lug Nuts:

- If your lug nuts are not properly tightened, the wheel can move slightly, causing a grinding or rattling noise.

10. Other Loose Parts:

- Sometimes, rattling noises can be caused by loose bolts, screws, or other components in the engine bay, suspension, or undercarriage.

It is important to get the issue diagnosed and addressed as soon as possible to avoid further damage or safety concerns. If the noise persists or you notice any other abnormalities, it is best to have your vehicle inspected by a professional mechanic or automotive technician.