how to fix a transmission fluid leak in my Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical issues.

2. Raise the Vehicle

• Use a jack to lift the front of the vehicle and secure it on jack stands.
• Ensure the vehicle is stable before proceeding.

3. Identify and Access the Leak

• Remove any underbody shields if present.
• Clean the transmission area using a degreaser to remove old fluid and dirt.
• Use a flashlight to help locate the source of the leak.

4. Replace Seals or Gaskets

• If the leak is from the transmission pan:
  • Remove the transmission pan: Use a socket set to undo the screws, and carefully pry it off if necessary.
  • Replace the gasket: Clean the mating surfaces and install a new gasket. Torque the screws to the manufacturer's specifications (usually between 8-10 Nm).
• If the leak is from a seal (e.g., output shaft seal):
  • Remove the seal: Use a seal puller to carefully extract the old seal.
  • Install the new seal: Lubricate the new seal with transmission fluid and press it into place evenly.

5. Refill Transmission Fluid

• Replace the transmission pan if it was removed.
• Use a funnel to refill the transmission with the appropriate type and amount of fluid (consult the owner's manual for specifications).
• Check the fluid level with the dipstick and ensure it is within the proper range.

6. Lower the Vehicle

• Remove the jack stands and lower the vehicle back to the ground.
• Reconnect the battery.