2022 Subaru Outback — Transmission Fluid & Service

Quick answer

• Transmission make/model: Lineartronic TR580 CVT
• OEM fluid spec: Subaru High-Torque CVT Fluid (SOA427V1660)
• Drain & fill capacity: ~5 quarts
• Full overhaul capacity: ~13 quarts
• Filter OEM part number: Verify with dealer or service manual
• Recommended service interval: 60,000 miles (normal); 30,000 miles (severe duty/towing)

Fluid type explained

The 2022 Subaru Outback is equipped with a Lineartronic TR580 continuously variable transmission (CVT). Unlike traditional automatic transmissions with fixed gear ratios, a CVT uses a pair of variable-width pulleys and a steel belt to create a nearly infinite number of ratios. This allows the engine to operate in its most efficient RPM range, improving fuel economy.

CVTs require a special fluid to operate correctly. The 2022 Outback specifies Subaru High-Torque CVT Fluid (part number SOA427V1660). This fluid is specifically formulated to provide the proper friction between the belt and pulleys, as well as to cool and lubricate the transmission's internal components. Using a non-specified fluid can lead to slipping, shuddering, and premature transmission failure.

Service procedure

There are two main ways to service the transmission fluid in your 2022 Outback: a drain and fill or a full fluid exchange.

• Drain and fill: This procedure involves draining the old fluid from the transmission pan and refilling it with fresh fluid. A drain and fill typically replaces about 5 quarts of fluid, or about 40% of the total capacity. This is a relatively simple and inexpensive procedure that can be performed by most independent repair shops.

• Full fluid exchange: A full fluid exchange uses a specialized machine to pump all of the old fluid out of the transmission while simultaneously refilling it with fresh fluid. This procedure replaces nearly 100% of the fluid and is the most effective way to ensure that your transmission is protected. However, it is also more expensive than a drain and fill.

Service interval

Subaru of America does not specify a service interval for the transmission fluid in the 2022 Outback under normal driving conditions. However, under severe driving conditions, they recommend a fluid inspection every 30,000 miles and replacement as needed.

Severe driving conditions include:

• Towing a trailer
• Driving in dusty or mountainous conditions
• Repeated short trips in cold weather
• Driving in stop-and-go traffic for extended periods

Given the cost of transmission replacement, we recommend a drain and fill every 60,000 miles for normal duty and 30,000 miles for severe duty.

Common transmission problems

The TR580 CVT is a generally reliable transmission, but there have been some reports of problems, including:

• Torque converter clutch solenoid failure: This can cause a shudder or vibration when accelerating or decelerating. In some cases, the check engine light may also illuminate.
• Valve body failure: The valve body controls the flow of fluid through the transmission. A failed valve body can cause a variety of problems, including harsh shifting, slipping, and a loss of power.
• Fluid leaks: The transmission can leak fluid from a variety of places, including the pan gasket, axle seals, and torque converter seal.

If you are experiencing any of these problems, it is important to have your vehicle diagnosed by a qualified technician as soon as possible.

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