how to fix whining noise from differential in my Tesla Model Y

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the vehicle battery.

2. Drain Differential Fluid

• Locate the differential drain plug.
• Using a socket set, remove the drain plug and allow the fluid to completely drain into a suitable container.
• Inspect the drained fluid for metal shavings or excessive debris.

3. Remove Differential Cover (if applicable)

• Remove any bolts securing the differential cover using a socket set.
• Carefully pry off the cover with a gasket scraper, ensuring not to damage the mating surface.
• Clean the mating surfaces thoroughly with a solvent.

4. Inspect Gears and Bearings

• Examine the condition of the ring and pinion gears for wear or pitting.
• Check the differential bearings for play or roughness by rotating them with your fingers.
• Replace any damaged components as necessary.

5. Reassemble Differential

• If the gears and bearings are in good condition, reapply a suitable gasket maker or install a new gasket.
• Reattach the differential cover and torque bolts to manufacturer specifications (usually around 30-40 ft-lbs).

6. Refill Differential Fluid

• Use a fluid pump to fill the differential with the appropriate type and amount of fluid (typically Tesla-approved gear oil).
• Replace the drain plug and ensure it is securely tightened.

7. Reconnect Battery and Test

• Reconnect the vehicle battery.
• Start the vehicle and perform a test drive to ensure the whining noise has been eliminated.