How to Drain and Fill Transmission Fluid

Learning how to drain and fill transmission fluid is important for drivers if an emergency leak occurs. With the proper tools and knowledge, you can inspect, drain, and refill your transmission fluid safely at home, although many experts recommend having it done by a professional. Find out how to correctly perform this maintenance task with this guide from Pacific Honda.

What You’ll Need

Before you start, gather the necessary materials. You’ll need a fluid catch pan, safety glasses, gloves, a jack and jack stands to lift your car, and the correct type of transmission fluid; this varies by vehicle, so check your owner’s manual carefully. Some vehicles also require a funnel or a hand pump to refill the fluid properly.

Draining the Fluid

Start by ensuring your car is parked on a level surface with the engine off and the parking brake engaged. Safely raise the vehicle using the jack and secure it with jack stands. Locate the transmission fluid pan and use a socket wrench to carefully remove the drain plug if your vehicle has one.

If your car does not have a drain plug, you may need to loosen the pan bolts to drain the fluid, which can be messier. Once draining begins, the old fluid—typically red or brown—will flow into the catch pan. Let it drain completely.

Filling the Fluid

After draining, reinstall the drain plug or pan securely. Dispose of old transmission fluid at a certified recycling center—never pour it down a drain. Open the hood, remove the transmission dipstick or access cap, and use a funnel or pump to slowly add new fluid.

Check the level using the dipstick while the engine is running and the vehicle is in park, and add more fluid as needed. Be careful not to overfill.

Learn How to Drain and Fill Transmission Fluid in San Diego, CA

Contact Pacific Honda today to book a service appointment to find any transmission leaks. We’re here to help you extend the life of your transmission and keep your vehicle running smoothly.