Parts for your 2009 Toyota Hilux surf-Transmission filter

2009 Toyota Hilux Surf transmission filter: what it is and how to look after it

Based on Toyota’s factory literature and parts catalogues, a transmission filter is indeed used on the 2009 Toyota Hilux Surf (215 series). Toyota’s Repair Manual for the 4Runner/Hilux Surf (N215, 2002–2009) identifies an internal “oil strainer” for the automatic transmissions fitted to this model, including the Aisin A750F 5‑speed and A340F/A343F 4‑speed units. The Toyota Electronic Parts Catalogue lists an Oil Strainer (AT) for these gearboxes (commonly referenced under part families such as 35330‑30080 for A750F and 35330‑30010 for A340F/A343F, confirm by VIN). Aisin service information for the A750E/A750F also describes a replaceable internal strainer accessible by removing the transmission pan.

On the 2009 Hilux Surf, the transmission filter (strainer) sits inside the auto’s sump and screens out clutch material and fine debris before the oil feeds the pump and valve body. Keeping that strainer clean and the fluid fresh maintains hydraulic pressure, smooth shifting, and helps prevent accelerated wear in the valve body and torque converter.

While Toyota classifies many WS‑fluid transmissions as “filled for life” under normal use, real‑world Aussie and Kiwi conditions—towing, hot climates, beach work, or stop‑start commuting—justify periodic fluid servicing and a strainer swap when the pan is off. A practical approach is to replace the strainer whenever the pan is removed for maintenance, after evidence of contamination (burnt, dark or glittery ATF), or following a major event like overheating or water ingress. For the 5‑speed A750F, the correct fluid is Toyota ATF WS. Some 4‑speed variants (A340F/A343F) use Toyota Type T‑IV, always verify by VIN/ID plate and the factory manual.

Recommended service notes for a pan‑off job:

• Drop the pan, clean the magnets, and fit a new pan gasket/O‑ring with the replacement strainer. Torque pan and strainer bolts to spec.
• Refill with the specified ATF and set the level using the overflow plug and the temperature method (scan tool or SST to confirm ATF temp). Many WS boxes are dipstick‑less.
• Expect roughly 3–4 litres on a pan drain and 9–12 litres for a full exchange, but measure what comes out and follow factory guidance.

Tell‑tale signs the strainer may be restricted include delayed engagement, flare or slip on upshifts, shudder, or harsh shifts. Addressing these early—with the right ATF and a quality strainer—keeps the Surf’s auto happy for the long haul.

Popular questions

Does a 2009 Hilux Surf have a serviceable transmission filter?
Yes. It uses an internal oil strainer inside the pan on Aisin A750F and A340F/A343F gearboxes. It’s accessible when the pan is removed. Part details vary by VIN, so it’s smart to confirm via the Toyota EPC or a dealer.

What ATF should it use, and how much is needed for a service?
Most 5‑speed A750F versions specify Toyota ATF WS, while some 4‑speed A340F/A343F units use Toyota Type T‑IV. For a pan drain, expect around 3–4 litres, a complete exchange can be roughly 9–12 litres. Always verify spec and capacity for the exact variant.

How often should the filter or ATF be changed in AU/NZ conditions?
Under heavy use (towing, heat, off‑road), many technicians opt for ATF changes around 60,000–90,000 km. The strainer is usually replaced when the pan’s off or if there are symptoms or contamination. For light‑duty use, monitor fluid condition and follow the factory manual’s guidance.