Parts for your 1986 Mitsubishi Pajero-Power steering fluid

1986 Mitsubishi Pajero Power Steering Fluid

Technical references confirm power-steering fluid is absolutely relevant to the 1986 Mitsubishi Pajero (L040/L140 series). The factory Mitsubishi Pajero/Montero Workshop Manual (1983–1991), the Mitsubishi owner’s handbook for the period, and well-known repair guides such as Gregory’s 518 and Haynes for 1983–1991 models specify a hydraulic power-assisted steering system that uses automatic transmission fluid (ATF), typically Dexron II, in the power-steering reservoir.

The power-steering fluid in a 1986 Pajero does a lot more than just help turn the wheel. It transmits hydraulic pressure from the pump to the steering box, so the driver gets light, confident steering at parking speeds and stable feel on the open road. It also lubricates internal components and carries away heat, protecting the pump, seals, and steering gear from premature wear—handy for a classic 4x4 that might see corrugations, towing, or low-speed off‑road work.

For fluid choice, Mitsubishi’s period documentation calls for ATF to Dexron II spec in the power-steering system. Many owners and workshops now use Dexron III as a service replacement. Stick with a reputable ATF and avoid mixing in “universal” fluids that don’t state Dexron compatibility. Fresh ATF is usually red, if it’s gone dark, smells burnt, or looks milky/foamy, it’s due for attention.

As part of routine servicing, it’s smart to check the level and condition at each oil change and plan a fluid refresh about every 2 years or 40,000–60,000 km, sooner if the Pajero works hard or shows symptoms. A simple top-up won’t fix contamination, a proper exchange makes a noticeable difference to steering feel and pump quietness. While you’re there, inspect hoses, clamps, the pump shaft seal, and the steering box for weeping. Any leak will quickly turn into a groaning pump and heavy wheel.

DIY-friendly options include:

• Quick partial exchange: use a fluid syringe/turkey baster to remove old fluid from the reservoir, refill with fresh ATF, drive a few days, and repeat until the fluid stays clean.
• Full flow-through exchange: disconnect the low-pressure return hose, cap the reservoir port, route the hose to a catch bottle, start the engine briefly while adding fresh ATF to the reservoir, and stop before it runs low. Reconnect, then bleed.

Bleeding is easy: with the front wheels off the ground, turn lock-to-lock slowly with the engine off, topping up as bubbles purge. Then start the engine and repeat without holding at full lock. If it still whines or the fluid aerates, check for air leaks on the suction side. Keeping the system clean and full protects an increasingly hard-to-replace pump and steering box on this classic Mitsubishi.

Popular questions about 1986 Mitsubishi Pajero power-steering fluid

What fluid should be used in a 1986 Pajero power steering system?
Period Mitsubishi manuals specify ATF to Dexron II for the power-steering reservoir. In practice, many use a quality Dexron III ATF today. Avoid mixing incompatible fluids, if changing type, do a full exchange rather than a top-up.

Expect roughly a litre for a basic drain-and-fill and more (often 1–2 litres) for a thorough flow-through exchange, depending on how much old fluid you purge.

How often should the power-steering fluid be changed?
A good rule of thumb is every 2 years or 40,000–60,000 km. Shorten the interval if the vehicle tows, works off-road, or if the fluid darkens, smells burnt, or the pump starts to groan. Regular checks at each engine oil service help catch issues early.

How do you bleed the Pajero’s power-steering system after a fluid change?
Raise the front wheels, engine off, and turn the steering wheel slowly from lock to lock several times, topping up the reservoir as bubbles purge. Then start the engine and repeat gently, without holding it at full lock. Recheck the level after a short drive and inspect for leaks.