Parts for your 2010 Toyota Fortuner-Transmission filter

2010 Toyota Fortuner transmission filter — what’s fitted and how to look after it

Based on Toyota service literature for the Aisin automatic used in the 2010 Fortuner (A340/A343 family) and Toyota’s Electronic Parts Catalogue, the automatic models do have an internal transmission oil strainer (commonly called a transmission filter) inside the sump pan. Toyota parts listings label it “Oil Strainer, AT” (e.g., 35330-xxxxx). The Fortuner’s manual gearbox variants don’t use a transmission filter at all — they rely on magnetic drain plugs and the oil itself for debris control. Technical sources referenced: Toyota Repair Manual for A340/A343 series automatics, Toyota Global/Regional EPC, and Aisin AW service data for A340-family transmissions.

For owners of the 2010 Fortuner with the auto, that internal filter plays a key role. It’s a fine-mesh strainer that screens clutch material and wear particles, protecting the valve body and solenoids so shifts stay smooth under Aussie and Kiwi conditions. Unlike a screw-on external filter, it’s not a frequent service item, Toyota designs these “lifetime” strainers to be cleaned or replaced only when the pan’s off, during a major service, or if there are signs of contamination.

Practical servicing advice? Start with the fluid. Use Toyota ATF WS (JWS 3324) and aim for periodic drain-and-fills every 60,000–80,000 km if the vehicle tows, sees hot climates, or lots of stop–start driving. A simple drain will usually exchange 2–4 litres, repeating the process over a couple of services refreshes more of the total fill. When shifting quality degrades, the fluid’s dark, or there’s shudder, consider a pan drop: clean the pan and magnet, replace the gasket and the strainer’s O-ring, and fit a new strainer if the mesh shows damage or heavy debris. Pan bolts are low torque (around 8 N·m), so over-tightening is a common mistake.

Level setting on WS autos matters. After refilling, the correct level is set via the overflow plug with the trans fluid at the specified temperature window (typically about 40°C) using a scan tool or thermometer. Getting this wrong can cause flare, harsh shifts, or overheating. If the Fortuner is a manual, skip all that: there’s no filter, just change the gearbox oil on schedule and keep an eye on the magnet for unusual metal.

Does a 2010 Toyota Fortuner have a transmission filter?

Automatic models do — it’s an internal pan-mounted oil strainer. Manual models do not use a filter. This comes straight from Toyota’s repair manuals and parts catalogues for the A340/A343 automatic used in that era Fortuner.

How often should the transmission filter be replaced on a 2010 Fortuner?

It isn’t a routine replacement item. Inspect it whenever the pan is off, replace if the mesh is damaged, clogged, or during a rebuild. For regular servicing, focus on fresh Toyota WS fluid every 60,000–80,000 km in local conditions.

What transmission fluid does it take, and how much?

Toyota ATF WS. A single drain-and-fill usually returns 2–4 litres, the total capacity is higher, varying by transmission and cooler setup. Always set the level using the overflow method at the specified fluid temperature.