my Toyota Corolla E170 (2013-2019) has a transmission fluid leak, what should I do

Solution

1. Preparation

• Gather tools and materials needed for the repair.
• Ensure the vehicle is parked on a level surface and engage the parking brake.
• Disconnect the battery to avoid electrical issues.

2. Identify and Replace Leaking Component

• Transmission Pan:

  1. Raise the vehicle using a jack and secure it on jack stands.
  2. Drain the transmission fluid from the pan by removing the drain plug or loosening the pan bolts.
  3. Remove the transmission pan carefully and check the gasket for wear or damage.
  4. Clean the mating surfaces of the pan and transmission.
  5. Replace the gasket and reinstall the pan using a torque wrench (typically to 8-10 ft-lbs).

• Transmission Cooler Lines:

  1. Locate the cooler lines connected to the transmission.
  2. If leaking, remove the clamps and disconnect the lines.
  3. Replace with new lines and secure with clamps.

• Seals and Gaskets:

  1. Identify any leaking seals (input shaft seal, output shaft seal).
  2. Remove the old seals with a seal puller.
  3. Install new seals ensuring they are properly seated.

3. Refill Transmission Fluid

1. Reconnect any components that were removed.
2. Refill the transmission with the correct type of fluid (consult owner’s manual).
3. Start the vehicle and allow it to reach operating temperature.

4. Final Inspection

1. Check for any leaks after the vehicle has run for a few minutes.
2. Ensure the transmission fluid level is at the correct mark on the dipstick.