1. Park your car on level ground and turn off the engine. Allow the engine to cool down completely before proceeding.
2. Locate the transmission oil fill plug. The fill plug is located on the side of the transmission housing, near the top. It is usually a 17mm bolt.
3. Remove the fill plug. Use a wrench to loosen the fill plug and remove it from the transmission housing.
4. Insert a funnel into the fill hole. The funnel should be long enough to reach the bottom of the transmission housing.
5. Add transmission oil. Slowly pour transmission oil into the funnel until it reaches the bottom of the fill hole. The transmission will hold approximately 2.5 liters of oil.
6. Replace the fill plug. Once you have added the correct amount of oil, replace the fill plug and tighten it securely.
That's it! You have now successfully added transmission oil to your 1987 Jetta manual transmission.
