how to fix the differential whining noise in my Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Tools Required: Jack, jack stands, drain pan, socket set, torque wrench, fluid pump.
• Ensure the vehicle is on a level surface.
• Raise the vehicle using a jack and secure it with jack stands.

2. Drain Differential Fluid

• Sub-steps:
  1. Place a drain pan under the differential.
  2. Remove the drain plug using a socket wrench and allow the fluid to fully drain out.
  3. Inspect the drained fluid for metal shavings or discoloration, which indicates wear.

3. Replace Differential Fluid

• Sub-steps:
  1. Clean the drain plug and replace it with a new washer if necessary.
  2. Use a fluid pump to fill the differential with the specified fluid (check owner's manual for the correct type).
  3. Fill until the fluid reaches the bottom of the fill hole.
  4. Reinstall the fill plug and tighten to the manufacturer's torque specifications.

4. Inspect and Replace Components (if necessary)

• Sub-steps:
  1. If the noise persists, remove the differential cover or housing (if applicable).
  2. Inspect the gears, bearings, and seals for wear or damage.
  3. Replace any worn components with OEM parts, ensuring proper alignment during reassembly.
  4. Reinstall the differential cover, ensuring a proper seal.

5. Reassemble and Lower Vehicle

• Sub-steps:
  1. Double-check all bolts and connections.
  2. Lower the vehicle from the jack stands.
  3. Conduct a final visual inspection for leaks.