Parts for your 2017 Subaru Legacy-Transmission filter

Transmission Filter for the 2017 Subaru Legacy: What You Need to Know

The 2017 Subaru Legacy is a great mid-size sedan that blends reliability with smooth driving dynamics. When it comes to its transmission system, particularly whether it uses a transmission filter, there's a bit of nuance to unpack for those keen on keeping their vehicle running sweetly for years to come.

Firstly, it's important to clarify that the 2017 Subaru Legacy uses a continuously variable transmission (CVT), specifically the Lineartronic CVT in many models. Unlike traditional automatic transmissions that rely on multiple gears, a CVT works with a belt and pulley system to provide seamless acceleration. This unique setup also influences how Subaru engineers designed and maintained the transmission for longevity and performance.

Now, onto the question at hand: Does the 2017 Subaru Legacy have a transmission filter? According to Subaru's official technical maintenance resources and service manuals, this generation of Legacy with the Lineartronic CVT does not use a conventional transmission filter like you'd find in traditional automatics. Instead, it features a built-in mesh screen or strainer within the transmission that filters the fluid. This screen is designed to catch debris or contaminants before the transmission fluid recirculates through the system.

The main reason for the absence of a separate, replaceable transmission filter is the design of the CVT system. The transmission fluid in a CVT must remain exceptionally clean because the transmission relies on hydraulic pressure and friction to control the belt and pulleys. Stopping to service or replace a transmission filter often can introduce contaminants or air into this closed system and potentially worsen wear or damage. Also, the built-in screen within the transmission housing is difficult to access without a full transmission teardown, making regular filter replacement impractical.

Instead of a transmission filter replacement, Subaru recommends regular transmission fluid maintenance to keep the system in prime condition. The manufacturer typically advises a transmission fluid change at around 60,000 to 100,000 kilometres depending on driving conditions. Using the correct Subaru-approved CVT fluid is essential because the lifespan of the transmission and the performance depends heavily on the quality and condition of the fluid.

So what does this mean practically for Legacy owners? Regular servicing with fluid changes is the best way to maintain the transmission cleanliness and functionality. Though you won't be replacing a separate transmission filter, checking the fluid condition and quantity and following the manufacturer's maintenance schedule goes a long way to extending the life of the transmission.

For those curious about the purpose of a transmission filter in general, here's a quick rundown. In traditional automatics, the transmission fluid is pumped around to lubricate and cool components, as well as to provide hydraulic power for gear engagement. A transmission filter serves to remove dirt, metal shavings, and other debris from the fluid before it circulates. This helps protect the delicate valve body, clutch packs, and gears from damage.

Replacing the transmission filter regularly in a traditional system is a cost-effective way to prevent transmission failure or costly repairs down the track. Typically, a transmission service involves draining old fluid, removing the pan to access and replace the filter, and refilling with fresh fluid. Because the 2017 Subaru Legacy with a CVT design skips the filter replacement step, this service is simplified but must be done properly using the correct procedures to avoid compromising the transmission.

Maintenance tips for the 2017 Subaru Legacy's CVT include:

• Having the CVT fluid changed every 60,000 to 100,000km or as recommended in the owner's manual
• Using only genuine Subaru CVT transmission fluid to meet the exact specifications
• Getting the transmission inspected if you notice sluggish acceleration, slipping, or unusual noises
• Avoiding harsh driving conditions such as towing heavy loads or aggressive acceleration to extend transmission life

Even though there's no traditional transmission filter to swap out, taking care of the fluid and treating the transmission with respect will ensure the 2017 Subaru Legacy's Lineartronic CVT continues to perform smoothly. Many owners find that with proper maintenance, the CVT transmission runs reliably well beyond 200,000 kilometres.

In the end, while the absence of a conventional transmission filter might mystify some Subaru Legacy drivers, it's just one part of a carefully engineered transmission system designed for durability and efficiency. Keeping up with scheduled fluid changes and watching for signs of wear is where attention should be focused. That way, the Legacy's transmission can keep you cruising comfortably on Australian roads for a long time to come.