Parts for your 2002 Mitsubishi Pajero-Transmission filter

2002 Mitsubishi Pajero transmission filter — what’s fitted and how to look after it

On the 2002 Mitsubishi Pajero with the INVECS-II automatic transmission (V4A51 4‑speed or V5A51 5‑speed), a transmission oil strainer/filter is fitted inside the pan. This is documented in Mitsubishi’s Workshop Manual (Group 23A – Automatic Transmission), illustrated as the “oil strainer,” and listed in the Mitsubishi ASA electronic parts catalogue along with the pan gasket. Trade databases such as AllData and Mitchell1 also list a service filter kit for 2001–2006 Pajero/Montero automatics. Note: the 2002 Pajero manual gearbox doesn’t use a transmission filter.

The transmission filter in a 2002 Pajero automatic quietly keeps the show running by catching clutch material, fine metal, and general muck that would otherwise circulate through the valve body and solenoids. A clean filter helps keep shifts crisp, line pressure stable, and the fluid’s cooling and lubrication on point, which is exactly what you want if the vehicle tows, tours long distances, or sees dusty outback work.

Mitsubishi didn’t put the filter on a fixed service interval in most schedules, it’s considered a strainer that’s inspected or replaced when the pan is off, during ATF servicing or any shift-quality diagnosis. For everyday ownership, the smart move is to service the ATF with the correct Mitsubishi ATF SP‑III (or a high‑quality equivalent meeting SP‑III spec) every 60,000–90,000 km, sooner if towing, in hot climates, or if the fluid looks dark or smells burnt. If the pan’s coming off, fit a new filter and pan gasket, clean the magnets, and button it back up. After refilling, cycle through all gears, then check the fluid level at operating temperature on level ground, following the dipstick marks and procedure.

Signs the filter may be restricted include:

• Flare, delayed engagement, or harsh shifts
• Intermittent limp mode or slipping under load
• Noisy pump or foamy/dark ATF on the dipstick

Avoid power-flushing an old transmission with unknown history, a gentle drain-and-fill (possibly repeated) is kinder. If contamination is found (heavy debris, glitter, or clutch fibre), replace the filter, inspect the cooler and lines, and consider a second fluid change after a short interval. Always use new seals, keep the pan spotlessly clean, and don’t overtighten fasteners. Done right, a fresh filter and the correct ATF keep the Pajero’s auto shifting sweet for many more kilometres.

FAQs

Does a 2002 Mitsubishi Pajero have a transmission filter?
Yes—if it’s an automatic. The 2002 Pajero with the INVECS‑II auto (V4A51/V5A51) has an internal sump-mounted strainer/filter. Manual models don’t use a transmission filter.

How often should the transmission filter be changed?
It’s not on a strict interval in most factory schedules. Replace the filter whenever the pan is removed, if there are shift issues, or if debris is present. Pair it with ATF service every 60,000–90,000 km, or sooner for towing and severe use.

What transmission fluid does a 2002 Pajero use?
Use Mitsubishi ATF SP‑III or a high‑quality equivalent that explicitly meets SP‑III. After refilling, warm the vehicle, cycle through all ranges, and check the level hot on level ground per the dipstick procedure.