Working With A Change Automatic Tranmission Fluid and Filter on 1966 Mustang


You jump in your car and notice that is feels like it is slipping out of gear or shifting in and out of neutral. What could the problem be? One problem may be that the transmission fluid and filter need to be changed.

In this tutorial, you will learn the steps to do this yourself. We are changing the fluid and filter on a 1966 Mustang. Other automatic transmissions are similar, but may vary on make and model on car.
Step 1: Watch Video
Step 2: Raise Car
Jack car or place on lift. If using a jack, use jack stands to secure car. Never craw under a car with only a jack holding it up.

Step 3: Counts Transmission Pan Bolts
Count the number of bolts holding the transmission pan on. Give parts store the motor you have and the number of bolts holding the pan on. 11, 15, or 17.

Step 4: Transmission Fluid
Buy 4 to 5 quarts of Type F transmission fluid.

Step 5: Place Drain Pan Under Car
Place drain pan under transmission pan. (Wearing gloves will keep you much cleaner.)

Step 6: Drain Fluid
Loosen one side of transmission pan to allow fluid to drain.

Step 7: Remove Transmission Pan
Remove all 11 bolts and remove holding pan and remove pan.

Step 8: Remove Transmission Filter
Remove 1 7/16 inch and 8 5/16 inch bolts holding filter in and remove filter.

Step 9: Remove Gasket
Remove gasket. This may require a gasket scraper.

Step 10: Inspect Transmission Pan
Inspect pan for any highs. Hammer and dolly highs level if you find any.

Step 11: Install New Transmission Filter
Install filter using a cross or star pattern.

Step 12: Install Transmission Pan
Place grease on flange of transmission pan to hold gasket in place. Then Install transmission pan using a cross or star pattern. (12-16 ft. lbs)

Step 13: Lower Car
Remove drain pan and lower car off of jack stands.

Step 14: Add Transmission Fluid
Add 4 quarts of Type F transmission fluid.

Step 15: Start Your Engine
Start engine and allow idling to warm up. Check for leaks then re-check dip stick. If low add more transmission fluid.

You Will Need:
Watch The Video
½ inch Socket, Ratchet, and Extension
7/16 inch Socket
5/16 inch Socket
Replacement Filter
Replacement Transmission Pan Gasket
4 to 5 Quarts Type F Transmission Fluid
Drain Pan
Gasket Scraper