Transmission Filter Change Step by Step

Changing a transmission filter is a critical maintenance task that ensures the smooth operation of your vehicle’s transmission system. For a DIY transmission filter change, Follow this easy-to-understand guide to replace your transmission filter correctly.

How to Change Transmission Filter Step by Step

DIY Transmission Filter Change:

You can easily change your transmission filter and fluid yourself. Follow the below step by step guide to get this job done in a breeze. Tools and Materials Needed for transmission filter change:

• Gloves – To protect your hands.
• Safety goggles – To protect your eyes from fluid splashes.
• 13mm socket – For removing bolts.
• 10mm socket – For securing or removing smaller bolts, such as the filter bolt.
• Ratchet with extension – For reaching bolts in tight spaces.
• Torque wrench – To tighten bolts to the correct specifications.
• Scraper – To remove the old gasket.
• Abrasive pad (e.g., Scotch-Brite™) – To clean the gasket surface.
• Funnel – For adding new transmission fluid.
• Brake cleaner – To clean the pan and magnet.
• Towels – For wiping surfaces and cleaning spills.
• Catch can – To collect draining transmission fluid.
• Tarp or cardboard – To protect the ground from fluid spills.

Transmission Filter Change:

The simplest steps to change a transmission filter are to remove the transmission pan, drain out the fluid, remove the filter, Install a new one filter and add the fluid (if fluid replacement is needed). Transmission Filter replacement is carried out when needed and when changing transmission fluid from the bottom manually and not using a machine as most pros do it in a transmission flush.

Here is how to do it:

Prepare the Vehicle and Drain Transmission Fluid:

Lift the Vehicle: Safely lift the car using ramps or jack stands. Ensure the wheels are securely chocked to prevent movement.

Position a Catch Can: Place a tarp and a catch can underneath the vehicle to collect the transmission fluid.

Locate the Transmission Pan: Starting from the front of the car, locate the transmission pan by moving past the crossmember, front differential, oil pan, and catalytic converter.

Controlled Fluid Drain: If your transmission pan lacks a drain bolt, create a controlled leak by Removing the rear bolts entirely while keeping the front bolts slightly loosened. Allow the pan to tilt and drain fluid into the catch can. Use tinfoil as a funnel to prevent fluid from spilling onto the frame.

Remove the Transmission Pan: Gradually loosen all side bolts, switching between sides. Use a universal joint extension for hard-to-reach bolts near the catalytic converter. Once the pan is loose, support it while removing the final bolts and slide it out.

Replace the Transmission Filter:

Remove the Old Filter: Locate and remove the 10mm bolt securing the filter. Pull down gently to release the filter.

Inspect the Valve Body Bolts: Check and snug all valve body bolts to 8 ft-lbs in a crisscross pattern to maintain fluid pressure and ensure smooth shifting.

Install the New Filter: Compare the new filter with the old one to ensure compatibility. Read this guide to transmission Filters. Lubricate the new filter’s O-rings with transmission fluid and install them. Push the filter into place and secure it with the 10mm bolt, torqued to 8-10 ft-lbs.

And that’s it, You Transmission Filter Change is complete. You Can Add Transmission Fluid at this stage but if your transmission pan is dirty, you need to clean it and replace the Gasket with a new one before adding transmission fluid.

Here is how to do that:

Prepare the Transmission Pan

Remove the Old Gasket: Carefully scrape off the old gasket using a plastic scraper to avoid damaging the pan surface.

Clean the Pan and Magnet: Spray brake cleaner inside the pan and on the magnet, which collects metal filings. Wipe everything clean with a towel.

Smooth the Mating Surface: Use a Scotch-Brite™ pad to clean the pan’s surface and remove any remaining gasket material.

Optional Painting: For added durability, apply primer and paint to the pan, allowing it to dry before installation.

Install the New Gasket: Apply a thin layer of silicone paste along the edge of the pan to hold the gasket in place. Align the holes and press firmly.

Reinstall the Transmission Pan

Clean the Mating Surface: Under the car, use a Scotch-Brite™ pad to clean the transmission’s mating surface. Remove any remaining gasket material.

Attach the Pan: Position the pan carefully and start hand-tightening the bolts. Avoid over-tightening at this stage to ensure the gasket stays aligned.

Torque the Bolts: Follow a crisscross tightening sequence to evenly compress the gasket. Use a torque wrench to tighten the bolts to 10-15 ft-lbs. For hard-to-reach bolts, use a universal joint socket and torque by feel.

Refill Transmission Fluid

Add New Fluid: Refer to your vehicle’s manual for the correct type and quantity of transmission fluid. Use a funnel to pour the fluid into the transmission dipstick tube.

Check Fluid Level: Start the engine and shift through all gears. With the engine running, check the fluid level and add more if needed to reach the recommended range.

Inspect for Leaks: Observe the pan and gasket area for any signs of leaks. Tighten bolts slightly if necessary.

Frequently Asked Questions

1. Can I change my own transmission filter?
Yes, with the right tools, safety precautions, and a step-by-step guide, you can change your own transmission filter.

2. How do I know if my transmission filter needs to be changed?
Signs include delayed shifting, transmission slipping, unusual noises, or a burning smell from the transmission.

3. What happens if the transmission filter is dirty?
A dirty filter can restrict fluid flow, leading to poor shifting, overheating, and potential transmission damage.

4. Where is the transmission filter?
The filter is located inside the transmission pan, secured by a single bolt to the transmission valve body.

5. Will a transmission work without a filter?
While it might function temporarily, operating without a filter can lead to severe damage as contaminants circulate through the system.

Additional Questions

6. How often should I change my transmission filter?
Typically, every 30,000 to 60,000 miles, but refer to your vehicle’s manual for specific recommendations.

7. Do I need to replace the transmission pan gasket?
Yes, always replace the gasket when changing the filter to ensure a proper seal and prevent leaks.

8. What tools do I need to change a transmission filter?
Common tools include a ratchet, socket set, universal joint extension, torque wrench, brake cleaner, and a catch can.