how to fix the transmission fluid leak in my Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Tools Required: Socket set, torque wrench, flat-head screwdriver, transmission fluid, gasket maker (if replacing a gasket), cleaning cloths.
• Park the vehicle on a level surface and engage the parking brake.
• Allow the engine to cool if it has been running.

2. Drain Transmission Fluid

• Place a drain pan under the transmission.
• Remove the drain plug (if equipped) or unbolt the transmission pan.
• Allow the old fluid to completely drain into the pan.

3. Remove the Transmission Pan

• Use the socket set to remove all bolts securing the transmission pan.
• Carefully pry off the pan using a flat-head screwdriver if necessary.
• Clean the mating surface on the transmission and the pan to remove old gasket material.

4. Replace Gasket or Seals

• If the gasket is damaged, replace it with a new one. If seals are leaking, replace them as well.
• Apply a thin layer of gasket maker to the transmission side (if applicable).
• Position the new gasket onto the pan.

5. Reinstall Transmission Pan

• Reposition the transmission pan and secure it using the bolts.
• Torque the bolts to the manufacturer's specifications (typically around 8-12 lb-ft, but check the specific torque for your model).
• Reinstall the drain plug if removed.

6. Refill Transmission Fluid

• Using a funnel, refill the transmission with the appropriate type of transmission fluid (check the owner’s manual for specifications).
• Start the engine and let it idle for a few minutes while cycling through gears.

7. Check for Leaks

• With the vehicle running, inspect the transmission pan and surrounding areas for any signs of leaks.
• If leaks are present, recheck pan bolts for proper torque.