how to fix my Tesla Model S Original (2012-2020) with transmission slipping

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

484 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix transmission slipping in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the high-voltage battery before performing any repairs.
•Always allow the vehicle's drive unit to cool before performing fluid inspections or replacements.

Symptoms

•Loss of power during acceleration
•Inconsistent or delayed gear engagement
•Warning lights on the dashboard
•Unusual noises during driving
•Reduced regenerative braking performance

Diagnostic Steps

1
Check the vehicle's software version and ensure it is up to date.
2
Inspect the high-voltage battery for any fault codes using the Tesla diagnostic tool.
3
Monitor the temperature of the drive unit to ensure it is within operational limits.
4
Verify the condition of the drive unit fluid, checking for contamination or low levels.
5
Conduct a visual inspection of wiring and connectors related to the drive unit.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Tesla diagnostic tool
•Fluid extraction pump
•Socket set
•Torque wrench

Parts Required

•Tesla drive unit fluid

Related Faults

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Diagnostic Steps

1
Check the vehicle's software version and ensure it is up to date.
2
Inspect the high-voltage battery for any fault codes using the Tesla diagnostic tool.
3
Monitor the temperature of the drive unit to ensure it is within operational limits.
4
Verify the condition of the drive unit fluid, checking for contamination or low levels.
5
Conduct a visual inspection of wiring and connectors related to the drive unit.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
Disconnect the high-voltage battery to prevent electric shock.

2. Update Software

Connect the vehicle to Wi-Fi.
Navigate to the Software section in the Tesla touchscreen and check for updates.
Install any available software updates and restart the vehicle.

3. Inspect Drive Unit Fluid

Locate the drive unit fluid reservoir.
Remove the cap and check fluid levels; top off with the recommended Tesla drive unit fluid if low.
Inspect the fluid for contamination; if contaminated, proceed to replace the fluid.

4. Replace Drive Unit Fluid (if necessary)

Tools Required: Fluid extraction pump, socket set, torque wrench.
Drain the old drive unit fluid using the fluid extraction pump.
Refill with new drive unit fluid, ensuring it meets Tesla specifications.
Torque the drain and fill plugs to the manufacturer’s specifications.

5. Reconnect Battery

Reconnect the high-voltage battery terminals ensuring a secure fit.
Perform any necessary system resets through the vehicle’s touchscreen.

6. Test Drive

Take the vehicle for a test drive to verify the repair.
Monitor for signs of slipping or other abnormalities.