Parts for your 2007 Subaru Forester-Transmission fluid

2007 Subaru Forester transmission fluid — what it does and how to look after it

Yes, this model absolutely uses transmission fluid. Referencing the Subaru Owner’s Manual (MY2007 Forester, SG series) and Subaru Service Manual, both factory sources specify transmission lubricants for every gearbox fitted to the 2007 Forester. The 4EAT automatic requires Subaru ATF-HP (a specific friction and viscosity spec for Subaru autos), while the 5‑speed manual uses API GL‑5 75W‑90 gear oil (Subaru Extra‑S or an equivalent that meets the same spec). So whether it’s an auto or a manual, the Forester relies on the correct transmission fluid to live a long, quiet life.

In the auto, ATF is the lifeblood. It creates hydraulic pressure to engage clutches and bands, lubricates moving parts, provides cooling, and carries away debris to the filter. In the manual, the gear oil cushions gears and synchros, controls wear under high load, and helps the box shift smoothly when hot or cold. Using the right spec matters—Subaru’s ATF‑HP isn’t the same as a generic Dexron/Mercon, and a GL‑5 75W‑90 is needed for the manual’s hypoid gear loads.

• Auto (4EAT): Use Subaru ATF‑HP. Check level warm, engine idling, on level ground, after shifting through all positions.
• Manual (5MT): Use API GL‑5 75W‑90. Level is checked at the fill plug, the box must be level and safely supported.

Service advice drawn from Subaru’s factory guidance and common workshop practice in AU/NZ: inspect fluid condition regularly and shorten change intervals for harsh conditions like towing, beach work, steep terrain, heavy loads or hot city stop‑start. Many owners opt for an auto drain‑and‑fill every 60,000–80,000 km (more often if worked hard). For manuals, fresh GL‑5 75W‑90 around 50,000–60,000 km in tough use keeps shifting slick and synchros happy. Always confirm intervals with the vehicle’s handbook.

• Stick with the specified fluid. Wrong ATF or gear oil can cause shudder, harsh shifts, bearing noise or synchro wear.
• Favour drain‑and‑fill services on the auto unless a proper machine and ATF‑HP are used, avoid aggressive solvent flushes.
• Replace crush washers, torque plugs correctly, and check for leaks at the pan, cooler lines and axle seals.
• If fluid looks burnt, smells harsh, or has glittery debris, get a technician to inspect before refilling and driving on.

Treated well with the right fluid, the 2007 Forester’s gearboxes are tough, smooth and dependable on Aussie and Kiwi roads.

Popular questions

What transmission fluid does a 2007 Subaru Forester take?
The 4EAT automatic uses Subaru ATF‑HP (often supplied by Idemitsu to Subaru spec). Don’t substitute generic Dexron/Mercon blends. The 5‑speed manual takes API GL‑5 75W‑90 gear oil, Subaru Extra‑S or a quality equivalent meeting the same spec is appropriate.

How often should the transmission fluid be changed?
Check condition regularly and shorten intervals for Aussie/NZ conditions like towing, sand, hills and heat. Many workshops recommend a 4EAT drain‑and‑fill every 60,000–80,000 km under mixed use, and manual gear oil changes around 50,000–60,000 km in harder service. Always align with the owner’s manual and local service schedule.

How do you check the auto transmission fluid level?
Warm the car with a short drive, park level, hold the brake and move the shifter slowly through each position, then leave it in Park with the engine idling. Pull the ATF dipstick, wipe, reinsert, then check the warm range. Top up only with ATF‑HP. The manual gearbox has no dipstick—its level is checked at the fill plug.