2016 Subaru Forester: Transmission Fluid & Service

Quick answer

• Transmission make/model: Lineartronic TR580 CVT
• OEM fluid spec: Subaru High Torque CVTF (or equivalent)
• Drain & fill capacity: ~6.5 quarts
• Full overhaul capacity: ~13 quarts
• Filter OEM part number: Verify with dealer or service manual
• Recommended service interval: 60,000 miles (normal duty) / 30,000 miles (severe duty)

Fluid type explained

The 2016 Subaru Forester uses a specific type of continuously variable transmission (CVT) fluid called Subaru High Torque CVTF. Unlike traditional automatic transmissions that use stepped gears, the Forester's Lineartronic CVT uses a pair of variable-width pulleys and a steel belt to create a seamless range of gear ratios. This design requires a fluid with unique frictional properties to prevent slippage and wear. Using a non-specified fluid can lead to poor performance, shuddering, and eventual transmission failure.

Service procedure

There are two main ways to service the transmission fluid in your Forester: a drain and fill or a full fluid exchange. A drain and fill is the more common DIY method and involves draining the fluid from the transmission pan, replacing the filter, and refilling with fresh fluid. This method typically replaces about half of the total fluid in the transmission. A full fluid exchange, on the other hand, uses a specialized machine to pump out all of the old fluid while simultaneously refilling with new fluid. This method is more thorough but also more expensive and typically requires a visit to a repair shop.

Service interval

Subaru recommends a transmission fluid service every 60,000 miles for normal driving conditions. However, if you frequently tow, drive in stop-and-go traffic, or live in a mountainous area, you should consider servicing the transmission every 30,000 miles. These "severe duty" conditions put extra strain on the transmission and can cause the fluid to break down more quickly.

Common transmission problems

The most common issue with the 2016 Subaru Forester's transmission is a shudder or vibration that occurs at low speeds. This is often caused by old or worn-out fluid, but it can also be a sign of a more serious problem with the torque converter or valve body. Other potential issues include a whining or grinding noise, a burning smell, or a delay in acceleration. If you experience any of these symptoms, it's important to have your Forester inspected by a qualified technician as soon as possible.

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