how to fix Tesla Model Y Current (2020-present) transmission slipping when accelerating

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and secured with wheel chocks.
• Disconnect the vehicle from charging and allow it to cool down if necessary.

2. Check Transmission Fluid

• Sub-steps:
  1. Remove the transmission fluid fill plug using a socket set.
  2. Insert a dipstick or suitable tool to check the fluid level.
  3. If low, add the recommended Tesla transmission fluid until the correct level is reached.
  4. If the fluid appears dirty or has a burnt smell, proceed to fluid replacement.

3. Replace Transmission Fluid

• Sub-steps:
  1. Place a drain pan beneath the transmission fluid pan.
  2. Remove the drain plug and allow the old fluid to completely drain out.
  3. Reinstall the drain plug with a torque specification of 30 Nm (22 lb-ft).
  4. Refill the transmission with new fluid through the fill plug, using the appropriate Tesla transmission fluid (check the owner’s manual for the specific type).
  5. Start the vehicle and allow it to idle; shift through all gears to circulate the new fluid.

4. Inspect and Replace Transmission Components (if necessary)

• Sub-steps:
  1. Inspect the transmission control module (TCM) for signs of damage or corrosion.
  2. If the TCM is faulty, remove it and replace it with a new unit, following the specific removal and installation procedures outlined in the service manual.
  3. Reset the TCM using the OBD-II scanner after installation.

5. Software Update

• Sub-steps:
  1. Connect the vehicle to a Wi-Fi network.
  2. Check for and download any available software updates from the Tesla interface.
  3. Follow the prompts to complete the update process, ensuring the vehicle stays powered during the update.