Parts for your 1999 Mitsubishi Pajero-Transmission filter

1999 Mitsubishi Pajero transmission filter – what it does and how to look after it

Based on Mitsubishi’s own technical literature – the factory Workshop Manual for late Gen-2/2.5 Pajero (circa 1997–1999) and the Mitsubishi ASA electronic parts catalogue – the 1999 Mitsubishi Pajero fitted with the 4‑speed INVECS-II automatic uses an internal transmission oil strainer (often called a transmission filter) inside the pan. There’s no factory external spin‑on filter on these autos. Manual gearboxes on the same model don’t use a transmission filter at all.

On the automatic Pajero, the transmission filter’s job is simple but crucial. It screens out clutch material, varnish flakes and fine metal particles so they don’t recirculate through the valve body, solenoids and torque converter. Keeping the fluid clean helps the gearbox shift crisply, keeps line pressure stable and extends the life of bearings and clutches – pretty important if the vehicle tows, does beach work, or sees corrugations on Kiwi backroads.

Because the Pajero’s filter is an internal strainer, it isn’t a routine “spin it off and replace it” item. Mitsubishi’s service schedule for this era calls for ATF replacement at set intervals, and leaves the strainer for pan‑off servicing or overhaul. For real‑world ownership in Australia and New Zealand, a sensible approach is:

• Replace the ATF with Mitsubishi ATF SP‑III (or an approved equivalent) about every 60,000 km, sooner if the vehicle tows or sees heavy off‑road use.
• Every 150,000–200,000 km – or if you notice shudder, flare, harsh shifts or burnt‑smelling fluid – drop the transmission pan, clean the magnets, inspect debris, and replace the internal strainer and pan gasket.
• Always check level and condition hot, on level ground, following the Mitsubishi procedure. Pink/red and sweet‑smelling is good, dark/burnt means it’s due.

There are aftermarket inline cooler‑return filters some owners add for extra insurance, they’re not factory equipment on the 1999 Pajero auto. If your vehicle is a manual, there’s no transmission filter by design – just stick to the correct gear oil and change intervals.

Technical basis: Mitsubishi Workshop Manual (Automatic Transmission section, V4A-series) and Mitsubishi ASA parts listings for NL/NM-era Pajero show an internal ATF strainer and pan gasket, with no external, serviceable filter specified.

Popular questions about 1999 Mitsubishi Pajero transmission filter

Does a 1999 Pajero actually have a transmission filter?
Yes – if it’s an automatic. It uses an internal ATF strainer inside the pan, not an external spin‑on filter. Manual‑trans Pajeros don’t have a transmission filter at all. If you’re unsure which you’ve got, check the build plate and the shifter pattern.

How often should the transmission filter be changed?
There’s no set interval for the internal strainer. Most owners change ATF about every 60,000 km and plan a pan‑off service with strainer and gasket around 150,000–200,000 km, or sooner if there are shift issues, contaminated fluid, or heavy towing/4x4 use.

What fluid should be used, and how much does it take?
Use Mitsubishi ATF SP‑III or an approved equivalent. A simple drain‑and‑fill typically takes around 4–5 litres, a full refill after overhaul can be roughly double that. Always follow the Pajero’s workshop procedure for checking level hot, and don’t mix incompatible fluids.