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What is causing intermittent wheel vibration on 97 SC300 Lexus?

1. Warped Brake Rotors:

- Vibration usually intensifies during braking but could occur while idling.

- Visual inspection of the rotors may reveal ridges or uneven wear.

2. Uneven Tire Wear:

- Tires with cupping, scalloping, or uneven tread wear can cause a sensation similar to warped rotors.

- Visually inspect tires, specifically at different points from center to shoulder.

3. Tire Balancing Issues:

- Imbalances create vibration felt through the steering wheel.

- Have a tire shop re-balance to eliminate this cause.

4. Worn Ball Joints/ Tie Rod Ends:

- Loose or worn suspension components contribute to vibration while driving or changing directions.

- Look for excessive play in steering linkages.

5. Driveline Issues:

- Worn universal joints or faulty driveshaft can vibrate at specific speeds.

- Inspect driveshaft components (if accessible) for any play or excessive movement.

6. Axle Problems:

- Faulty CV joints or damaged axle components transmit vibration.

- Listen for clicking or popping sounds while in motion and check for grease leaks along axles.

7. Transmission/Engine Mounts:

- Worn-out mounts let excessive engine/transmission vibrations pass to the car's undercarriage.

- Inspect for cracks or visible failures in support mountings.

8. Wheel Bearing Problem:

- Failing wheel bearings vibrate and produce humming/grinding noise, mostly at higher speeds.

- Check for any play or looseness in the wheels

It's recommend to have a trusted mechanic properly diagnose the source of the intermittent wheel vibration as the cause could be a combination of factors or require deeper troubleshooting and expertise. Safety should always be prioritized.