Parts for your 1999 Nissan Navara-Transmission filter

1999 Nissan Navara transmission filter – what it is, and when it matters

Based on technical references including the Nissan D22 Factory Service Manual (AT section for the RE4R01A), JATCO RE4R01A service literature, and Nissan FAST electronic parts catalog, the 1999 Nissan Navara D22 with a 4-speed automatic uses an internal ATF oil strainer (often called a transmission filter) located inside the transmission pan. The same sources show that the manual gearboxes fitted to the D22 (e.g., FS5W71C/FS5R30A variants) do not use a transmission filter, they rely on gear oil and magnetic plugs to control debris. So, a transmission filter is relevant for 1999 Navara automatics, but not for manuals.

For the automatic D22, the transmission filter’s job is straightforward: it screens clutch material, fine metal and other contaminants from the ATF before it’s pumped through valves, solenoids and the torque converter. By keeping the fluid clean and flow steady, the strainer helps protect shifting quality and the longevity of the RE4R01A.

While many factory schedules don’t list the internal strainer as a routine replacement item, plenty of workshops in Australia and New Zealand include it when dropping the pan for an ATF service—especially on vehicles that tow, see dusty conditions, or have unknown service history. During a pan service, a technician will typically replace the pan gasket, swap the strainer, clean the magnets and pan, then refill with the correct ATF (Dexron III/Nissan Matic-D equivalent) and set the level hot, with the selector cycled through the gears.

It’s smart to consider the strainer if any of the following crop up:

• Delayed engagement or flare on shifts, especially when hot
• Shudder, harsh shifts, or intermittent limp mode
• Dark or burnt-smelling ATF, or heavy debris on pan magnets

As a rule of thumb, a conservative approach is to refresh ATF every 60,000–90,000 km and replace the strainer when the pan is off. If the fluid is clean and shifts are crisp, some owners opt to inspect and clean without changing the strainer every time. For high-heat use—towing, sand work, long highway runs—shorter intervals won’t hurt.

DIYers should budget for a new pan gasket, filter/strainer, and the correct ATF volume. Keep it spotless—lint-free rags only—and torque pan bolts evenly. If the fluid is badly burnt or the pan is full of glitter, a deeper diagnosis is wise before just throwing a filter at it.

Popular questions about the 1999 Navara transmission filter

Does a 1999 Nissan Navara have a transmission filter?
Automatic models do—there’s an internal oil strainer inside the pan on the RE4R01A transmission. Manual models don’t use a transmission filter at all, they simply run the correct gear oil and rely on magnets to capture fines.

How often should the transmission filter be replaced?
There’s no strict factory interval for the internal strainer, but it’s commonly replaced during a pan service. Many workshops aim for 60,000–90,000 km ATF services and will change the strainer if the pan is off, or sooner for vehicles that tow or work hard.

Can the filter be serviced at home?
Yes, for the automatic. It’s a pan-off job: drain fluid, remove the pan, replace the strainer and gasket, clean the magnets, refit and refill with the correct ATF, then set the level hot. If unsure, a transmission specialist can do it quickly with the right equipment.