how to fix the transmission fluid leak on my Volkswagen Passat B8 (2015-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Drain Transmission Fluid

• Tools Required: Socket set, drain pan, funnel
• Place a drain pan under the transmission pan.
• Remove the transmission pan bolts using a socket wrench.
• Carefully lower the pan to drain the fluid. Dispose of old fluid properly.

3. Replace Transmission Pan Gasket

• Clean the transmission mating surface and remove any old gasket material.
• Parts Required: New transmission pan gasket
• Place the new gasket onto the transmission pan.
• Reinstall the transmission pan and torque the bolts to the manufacturer's specifications (typically around 8-10 Nm).

4. Inspect and Replace Transmission Cooler Lines (if needed)

• Tools Required: Wrench set, new transmission cooler lines
• If leaks are found in the cooler lines, remove the fittings using a wrench.
• Install new lines and ensure they are securely tightened to prevent leaks.

5. Refill Transmission Fluid

• Tools Required: Funnel, new transmission fluid
• Use a funnel to refill the transmission with the recommended type of fluid (check owner’s manual for specifications).
• Start the engine and allow it to idle for a few minutes, cycling through all gears to ensure fluid circulates.

6. Final Check

• After refilling, recheck the fluid level with the dipstick and add more fluid if necessary.
• Reconnect the negative battery terminal.