how to fix Tesla Model S Original (2012-2020) transmission slipping when shifting

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

525 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 battery before working on electrical systems.
•Allow the vehicle to cool before inspecting the transmission.

Symptoms

•Transmission slips during acceleration
•Unusual delay when shifting gears
•Increased RPM without corresponding acceleration
•Warning messages on the dashboard
•Poor overall vehicle performance

Diagnostic Steps

1
Check for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Inspect the transmission fluid level and condition; ensure it is not low or contaminated.
3
Examine the vehicle's software version; verify if a software update is available from Tesla.
4
Inspect the drive unit for any visible leaks or damage.
5
Test the performance of the throttle position sensor and transmission control module.

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

•OBD-II scanner
•Socket set
•Hydraulic lift or jack stands
•Fluid pump
•Multimeter

Parts Required

•Tesla-approved transmission fluid
•Replacement sensors (if identified as faulty)

Related Faults

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Diagnostic Steps

1
Check for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Inspect the transmission fluid level and condition; ensure it is not low or contaminated.
3
Examine the vehicle's software version; verify if a software update is available from Tesla.
4
Inspect the drive unit for any visible leaks or damage.
5
Test the performance of the throttle position sensor and transmission control module.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.

2. Check and Change Transmission Fluid

Sub-steps:
1. Raise the vehicle using a hydraulic lift or jack stands.
2. Locate the transmission fluid fill and drain plugs.
3. Use a socket set to remove the drain plug, allowing the old fluid to drain completely into a pan.
4. Inspect the old fluid for metal shavings or debris; this may indicate wear or damage to internals.
5. Replace the drain plug and torque it to the manufacturer’s specifications (usually around 8-10 Nm).
6. Remove the fill plug and use a fluid pump to add new transmission fluid (Tesla-approved fluid) until it begins to overflow.
7. Replace the fill plug and torque it to specifications.

3. Update Software

Sub-steps:
1. Connect the vehicle to Wi-Fi.
2. Navigate to the software update section in the Tesla interface.
3. Follow prompts to install any available updates, ensuring that the vehicle has sufficient battery charge to complete the update.
4. Restart the vehicle to apply changes.

4. Inspect and Replace Faulty Components

Sub-steps:
1. If error codes indicate specific sensor failures, remove and replace those components (e.g., throttle position sensor or transmission control module).
2. Disconnect the battery before working on electrical components for safety.
3. Use a multimeter to test the functionality of the replaced components before reinstallation.