Parts for your 1987 Mitsubishi Pajero-Transmission fluid

1987 Mitsubishi Pajero transmission fluid: what it does and how to look after it

Technical sources for the 1987 Mitsubishi Pajero — including the Mitsubishi Motors Workshop Manual for the early L040 series and the 1987 Owner’s Handbook — specify automatic transmission fluid (ATF, Dexron II grade) for the 4‑speed automatic, while the 5‑speed manual gearbox uses API GL‑4 gear oil, not ATF. So “transmission fluid” in the ATF sense is used on automatic 1987 Pajeros, and not used on the manual models.

On an auto 1987 Pajero, the transmission fluid is the lifeblood of the gearbox. It lubricates the planetary gearsets and bushings, cools hot components, transmits hydraulic pressure to apply clutches and bands, and controls friction so shifts are smooth instead of harsh or slippery. Good ATF also resists foaming, keeps varnish at bay, and protects against corrosion — all pretty important if the old girl is still towing, off‑roading, or commuting in Aussie/Kiwi heat.

For fluid spec, stick with an ATF meeting Dexron II (a modern Dexron III compatible fluid is typically acceptable for service on these older autos). Avoid Type F or CVT/DCT fluids. If it’s a manual Pajero, use the correct API GL‑4 manual gear oil (commonly 75W‑90), GL‑5 can affect yellow metals in some gearboxes and isn’t recommended by period manuals for the gearbox.

Servicing the auto’s ATF is straightforward and very worth it on a classic. As a rule of thumb, refresh every 40,000–60,000 km or 2–4 years, sooner if it tows, works hard, or the fluid looks dark or smells burnt. A sensible approach on an older transmission is a drain‑and‑fill (or pan‑drop with filter change), then repeat after a short interval to dilute the old fluid, rather than a high‑pressure “power flush”. Always check the level hot, idling in Park, on level ground, and cycle through the gears before measuring. Look for leaks at the cooler lines and pan gasket, and make sure the magnet in the pan is cleaned if it’s off. Capacity varies by transmission, a simple drain usually replaces only part of the total fill, so plan accordingly and dispose of old fluid responsibly.

• Technical sources: Mitsubishi Motors Pajero/Montero Workshop Manual (c. 1982–1991, L040 series), Mitsubishi Owner’s Handbook (1987 Pajero), Mitsubishi Group 22A Automatic Transmission service information, regional lubricant guides referencing Dexron II for period Mitsubishi automatics.

FAQs

What transmission fluid does a 1987 Mitsubishi Pajero automatic use?
Period documentation specifies ATF meeting Dexron II. In practice, a reputable Dexron III/Mercon fluid is commonly used for service on these older boxes. Don’t use Type F, CVT, or dual‑clutch fluids. If the vehicle has a manual gearbox, that unit takes API GL‑4 manual gear oil rather than ATF.

How often should the ATF be changed on a 1987 Pajero?
Every 40,000–60,000 km or 2–4 years is a solid interval for an older automatic, with earlier changes if it tows, sees heavy off‑road use, or the fluid is dark/burnt. Regular drain‑and‑fills help keep shifts clean and prolong clutch and band life.

Is a full flush better than a drain‑and‑fill on an older Pajero auto?
A gentle approach is usually best. A pan‑drop and filter change, followed by one or two drain‑and‑fills to refresh most of the fluid, is kinder to a high‑kilometre transmission than a high‑pressure machine flush. Always use the correct spec fluid and check hot level after service.