how to fix a differential noise on Tesla Model S Plaid/Refresh (2021-present)?

Solution

1. Preparation

• Tools Required:
  • Floor jack and jack stands
  • Socket set
  • Torque wrench
  • Differential fluid pump
  • OBD-II scanner
• Safety Warnings:
  • Ensure the vehicle is on a flat surface and securely supported before beginning work.
  • Disconnect the 12V battery to avoid electrical hazards.

2. Drain Differential Fluid

1. Position the vehicle on jack stands and remove the rear wheels for better access.
2. Locate the differential drain plug; use a socket to remove it.
3. Allow the fluid to completely drain into a suitable container.

3. Inspect Differential Components

1. Remove the differential cover if necessary, using a socket set.
2. Inspect the ring and pinion gears for wear or damage.
3. Check bearings and seals for signs of excessive wear or play.

4. Replace Differential Fluid

1. Clean the differential cover and replace the gasket if necessary.
2. Reinstall the differential cover, ensuring it is torqued to manufacturer specifications.
3. Use a differential fluid pump to refill with the recommended fluid type (e.g., Tesla-approved gear oil).
4. Replace the drain plug and torque it to specification.

5. Reassemble and Test

1. Reinstall the rear wheels and lower the vehicle.
2. Reconnect the 12V battery.
3. Conduct a test drive to ensure the noise has been resolved.