Parts for your 1997 Mitsubishi Pajero-Transmission filter

1997 Mitsubishi Pajero transmission filter: what’s fitted and how to look after it

Referencing the Mitsubishi Pajero NH–NL (1991–1999) factory workshop manual for the automatic transmission section, the Mitsubishi ASA electronic parts catalogue, and Aisin‑Warner 30‑40LE service literature used on 4M40 diesel models, the 1997 Pajero with an automatic gearbox is fitted with an internal, pan‑mounted ATF oil strainer (commonly called a transmission filter). Manual Pajero gearboxes of the same era don’t use a transmission filter, they rely on gear oil and a magnetic drain plug to catch debris.

For owners of a 1997 Mitsubishi Pajero with an automatic, the transmission filter’s job is straightforward: it screens out clutch material, fine metal and other contaminants so the hydraulic system, solenoids and pump can do their thing without grief. Clean fluid and a sound strainer mean crisper shifts, less heat and longer transmission life—handy whether it’s towing the boat, touring the High Country, or slogging through beach sand.

Servicing is simple and well within driveway territory for the handy. The filter sits behind the transmission sump pan. Dropping the pan allows a proper clean, magnet wipe and filter replacement, then a refill with the correct spec ATF. Many AU/NZ‑delivered Gen 2 Pajero automatics call for Dexron III‑type ATF, while some later supersessions and certain variants specify Mitsubishi ATF SP‑III. Because there were several auto units across engines and trims, it’s best to confirm by VIN, transmission code and the owner’s manual before buying fluid.

As a rule of thumb, a pan drop, new strainer and fresh ATF every 40,000–60,000 km (or 2–4 years) keeps things happy. If the Pajero tows often, sees heavy 4WDing, or lives in hot, hilly country, tighten that interval. When the pan’s off, look for excessive fuzz on the magnet, dark or burnt‑smelling fluid, and replace the gasket and O‑ring with quality parts.

• Tell‑tale signs it’s due: delayed engagement into Drive or Reverse, flare or slip on upshifts, shudder at low speed, or a faint pump whine when hot.
• Helpful tips: keep everything surgically clean, torque pan bolts evenly, and dispose of old ATF responsibly. After refilling, check level hot, on level ground, following the workshop procedure.
• Manual 1997 Pajero note: no transmission filter is used. Stick to periodic gear‑oil changes and clean the magnetic plug to manage wear debris.

Done right, a fresh filter and fluid will make the old bus shift smoother and run cooler, adding years to a hardworking gearbox.

Popular questions

Does a 1997 Pajero have a transmission filter?
Automatic models do—it’s an internal strainer behind the sump pan. It’s replaced during a pan‑off service along with the gasket and fresh ATF. Manual models don’t use a filter, they rely on quality gear oil and a magnet in the drain plug to catch particles.

How often should the transmission filter be changed?
For most use in Australia and New Zealand, plan a pan drop, new strainer and ATF every 40,000–60,000 km or 2–4 years. If the vehicle tows, works hard off‑road, or sees lots of heat, service it more frequently. Always confirm the correct ATF specification for your exact transmission.

What are the signs the filter is clogged?
Symptoms include slow or harsh engagement, flare between gears, shuddering on take‑off, and a whining pump when hot. Dark, burnt‑smelling fluid on the dipstick is another red flag. Address it early to avoid expensive internal wear.