how to resolve Tesla Model S Original (2012-2020) transmission slipping problems

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

529 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 issues in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, 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 to prevent shocks or shorts.
•Use gloves and safety glasses while handling fluids and electrical components.

Symptoms

•Sudden loss of power during acceleration
•Unusual noises from the drivetrain
•Inconsistent RPM fluctuations
•Warning messages on the dashboard
•Delayed engagement when shifting from park to drive or reverse

Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to check for any error codes related to transmission performance.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burnt fluid.
3
Check the wiring harness and connectors for any signs of damage or corrosion.
4
Test the performance of the transmission using Tesla's diagnostic tools to assess any abnormal behavior.
5
Evaluate the state of the motor mounts and transmission mounts for wear or damage, which could contribute to slipping.
6
Review software updates from Tesla to ensure the vehicle's firmware is current, as updates can resolve transmission issues.

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
•Fluid pump
•Safety glasses
•Gloves
•Electrical cleaner

Parts Required

•Transmission fluid specific to Tesla Model S
•Wiring connectors (if damaged)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to check for any error codes related to transmission performance.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burnt fluid.
3
Check the wiring harness and connectors for any signs of damage or corrosion.
4
Test the performance of the transmission using Tesla's diagnostic tools to assess any abnormal behavior.
5
Evaluate the state of the motor mounts and transmission mounts for wear or damage, which could contribute to slipping.
6
Review software updates from Tesla to ensure the vehicle's firmware is current, as updates can resolve transmission issues.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, fluid pump, safety glasses, gloves.
Ensure the vehicle is parked on a level surface and the parking brake is engaged. Disconnect the battery to avoid any electrical shorts during the repair.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Locate the transmission fluid fill plug and remove it.
2. Use a fluid pump to extract the old transmission fluid from the pan.
3. Inspect the fluid for metal shavings or burnt smell; if degraded, it needs replacement.
4. Replace with manufacturer-recommended transmission fluid (consult Tesla specifications).
5. Reinstall the fill plug securely and check for leaks.

3. Inspect Wiring and Connectors

Sub-steps:
1. Visually inspect the wiring harness connected to the transmission for frays, damage, or loose connections.
2. Clean any corrosion found on the connectors using electrical cleaner.
3. Repair or replace damaged wires or connectors as necessary.
4. Ensure all connections are secure before reassembling.

4. Update Software

Sub-steps:
1. Connect the vehicle to a Wi-Fi network.
2. Access the software update menu on the touchscreen.
3. Check for available updates and follow the prompts to install them.
4. Restart the vehicle after the update is complete to ensure proper functionality.