Buying the Right Transmission Fluid and Filter

March 20, 2025

4 min read

March 20, 2025

4 min read

Most manufacturers advise replacing the transmission fluid and filter every 30,000 to 60,000 miles. But different types of transmissions require different types of fluid, and they’re not interchangeable.

This article explains the types of transmission fluid and filters—and the criteria for choosing the best one. We also discuss the average cost of replacing the transmission fluid and filter.

Types of Transmission Fluid

A mechanic wearing black nitrile glove pours fresh transmission fluid into a red funnel. — Refilling a transmission with fluid typically requires a funnel. Make sure the funnel is clean and free of contaminants before you begin.

There are multiple kinds of transmissions, each served by specific transmission fluid. Standard automatic transmissions require a different type of fluid than continuously variable transmissions (CVTs), dual-clutch automatic transmissions (DCTs), and manual transmissions. So, it’s essential that you choose only the type designed to work with your transmission.

Older vehicles with manual transmissions typically use gear oil for transmission fluid.
Modern vehicles with manual transmissions use, of course, manual transmission fluid (MTF).
Most hybrids, mainly those from Japanese automakers, use CVTs that require their own fluid type.
There is also dual-clutch transmission fluid (DCTV) for dual-clutch transmissions. These are popular on Audis, Fords, and Volkswagens from the past two decades.

American vehicles use four different types of ATF:

Mercon (Ford)
Dexron (GM)
ATF+4 (Chrysler)
Multi-vehicle synthetics

ATF and ATF+4 are not compatible and should not be mixed. If you inadvertently put ATF in an ATF+4 vehicle, or vice-versa, flush out the offending fluid before it damages your transmission.

Here are other buying factors:

OEM vs. aftermarket: Original equipment manufacturer ( OEM) fluids and filters are designed to provide the same level of quality as from the factory. They are branded the same as the manufacturer of your vehicle. These can cost more, but you know you are getting a quality product. Some people prefer aftermarket brands to save money.

Additives: Different transmissions require specific chemical fluid formulations. Some include additives. Check your owner’s manual for your vehicle’s requirements. The wrong kind of fluid might damage your transmission. For example, vintage Fords and imported vehicles from the 1970s (and earlier) use Type F ATF, which lacks modern additives. It shouldn’t be used in modern vehicles.

Synthetic vs. conventional: As with motor oil, transmission fluid is found in synthetic and conventional formulations. Synthetic fluids offer better performance and oxidation resistance, allowing for longer replacement intervals. But they cost more. Also, they aren’t always recommended in older vehicles.

How Much Should You Pay for Transmission Fluid and a Filter?

Technician removes a bolt from the rear of a transmission drain pan with a long socket wrench, as the old transmission fluid starts to flow from the front of the pan. — Replacing the transmission fluid and filter is a straightforward DIY job.

Expect to spend between $10 and $20 per quart for a high-quality transmission fluid. OEM fluid could add a few dollars to the price. Most transmissions hold 12 to 15 quarts, but drain only half that. Budget for six to eight quarts. Adding a transmission filter and gasket may add up to $100 more.

All told, you could spend about $150 to replace the transmission fluid and filter on your car. Having a professional mechanic do the job could cost $200 to $500. With the right tools and by following our step-by-step guide to changing your transmission fluid and filter - opens in new window or tab. , you can perform the job yourself.

Parts and Tools Related to Replacing the Transmission Fluid and Filter

A transmission case with the drain pan removed. The old filter is still in place. — If you have the fluid drained and need to take the pan off to replace the filter, add a new gasket at the same time.

When replacing your transmission fluid and filter, it makes sense to install a new pan gasket. Gaskets wear down over time. Leaks can put the transmission at risk of failure. Since you already have the fluid drained and you need to take the pan off to replace the filter, add a new gasket at the same time. There should be a pan gasket included with the filter, although some vehicles use a bead of RTV gasket sealer instead.

It may also be a good time to perform regular maintenance, such as an oil and filter change - opens in new window or tab. , tire rotation - opens in new window or tab. , or engine air filter replacement. Check the manufacturer recommendations to see what jobs can be combined during the same service.

Special equipment is not required to replace the transmission fluid and filter. In many cases, you only need a high-quality floor jack, jack stands, filter wrench, socket and ratchet, and a drain pan.

A full transmission flush is not always recommended. But if it is, you may have to go to a shop with a dedicated machine that pushes the fluid from the cooler lines and torque converter. A straightforward drain-and-fill is the go-to for DIYers.

About the author

Brian Jones

Brian worked for several decades as an ASE Certified Master Technician in dealerships before starting his used car lot. Today, he writes for top automotive publications including Motor1. In his spare time, he's dreaming of an escape to the country's best trails in an off-road beast.

Share your feedback

This article is meant to provide general guidance only. Automotive maintenance, repair, upgrade, and installation may depend on vehicle-specifics such as make and model. Always consult your owner's manual, repair guide for specific information for your particular vehicle and consider a licensed auto-care professional's help as well, particularly for advance repairs.