my Volkswagen Passat B8 (2015-2022) has a transmission fluid leak

Solution

1. Preparation

• Gather all necessary tools and parts.
• Raise the vehicle securely on jack stands.
• Allow the transmission fluid to cool before starting work.

2. Identify and Replace Damaged Components

• Transmission Pan:

  • Remove the bolts securing the transmission pan using a socket set.
  • Carefully lower the pan to avoid spilling fluid. Drain any remaining fluid into a catch pan.
  • Replace the pan gasket if it shows signs of wear or damage.
  • Reinstall the pan and torque bolts to manufacturer specifications (typically 10-12 Nm).

• Transmission Cooler Lines:

  • Inspect the transmission cooler lines for leaks.
  • If damaged, disconnect the lines using the appropriate wrench and replace with new lines.
  • Ensure the fittings are tightened securely to prevent future leaks.

3. Seal Replacement

• Rubber Seals and Gaskets:
  • Identify and remove any damaged seals or gaskets using a scraper.
  • Clean the sealing surfaces thoroughly with a solvent.
  • Install new seals and gaskets, ensuring they are seated properly.

4. Refill Transmission Fluid

• Use the manufacturer-recommended transmission fluid.
• Fill the transmission to the correct level using the dipstick to check fluid levels as you fill.
• Check for any leaks around the repaired areas after filling.