my Toyota Corolla E140 (2006-2013) has a transmission fluid leak what should I do

Solution

1. Preparation

• Gather all tools and materials needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical issues during repair.

2. Drain Transmission Fluid

• Place a drain pan under the transmission pan.
• Remove the transmission drain plug (if equipped) using a socket wrench.
• Allow the fluid to completely drain into the pan.

3. Remove Transmission Pan

• Remove the bolts securing the transmission pan with a socket set.
• Carefully lower the pan and inspect for debris or metal shavings.
• Clean the surface of the transmission where the pan attaches.

4. Replace Gasket and Sealant

• Remove the old gasket material from the pan and transmission surface using a scraper.
• Apply a new gasket or sealant as per manufacturer specifications.
• Reattach the transmission pan and torque the bolts to the manufacturer’s specifications (usually around 7-10 Nm).

5. Check and Replace Leaking Parts

• If leaks are found in cooler lines, remove and replace the damaged sections.
• For leaking seals, remove the old seals and install new ones using proper tools.
• Replace any damaged components as identified during diagnostics.

6. Refill Transmission Fluid

• Reconnect the drain plug if removed.
• Using a funnel, refill the transmission fluid through the dipstick tube with the recommended fluid type (typically ATF WS for Toyota).
• Check fluid level and add more if necessary.

7. Final Inspection

• Start the engine and allow it to reach operating temperature.
• Shift through all gears while monitoring for leaks or unusual noises.
• Recheck fluid level and top off if necessary.