Parts for your 1989 Mitsubishi Pajero-Power steering fluid

1989 Mitsubishi Pajero power-steering-fluid

The 1989 Mitsubishi Pajero is fitted with a conventional, belt-driven hydraulic power steering system that uses automatic transmission fluid (ATF) as the power-steering fluid. This is specified in period technical literature, including the Mitsubishi Pajero/Montero Workshop Manual (1983–1991), Group 37A: Power Steering, the Haynes Repair Manual for Mitsubishi Pajero/Montero 1983–1996, and Gregory’s Service and Repair Manual for Pajero 1983–1991, all of which call for ATF meeting Dexron II specification for the power steering reservoir. So, yes—power-steering fluid is very much relevant on the 1989 Pajero and should be maintained like any other service fluid.

On this model, the fluid does three key jobs: it transmits hydraulic pressure so steering effort stays light at parking speeds, it lubricates the pump, spool valves and rack to reduce wear, and it carries away heat to keep seals and hoses happy. Because the system is hydraulic, fluid condition matters just as much as level. Old or overheated fluid can lose its viscosity and protective additives, which can lead to heavier steering, pump whine, and premature seal leakage.

For servicing, use a quality ATF labelled to meet Dexron II (many modern Dexron III fluids are backward compatible—check the label). Pop the bonnet and check the reservoir level with the engine warm, using the HOT/COLD marks as indicated. The fluid should be a clean red colour, if it’s brown or smells burnt, it’s due. As good practice, owners in Australia and New Zealand often refresh the fluid every 2–3 years or 40,000–60,000 km, or sooner in harsh, hot, or dusty use. A proper exchange (return-line flush) is best, followed by bleeding the system by turning the wheel from lock to lock with the front wheels off the ground—without holding it hard against the stops.

• Watch for symptoms: heavier-than-normal steering, whining or groaning, foamy fluid, or dampness around hose crimps, the pump shaft seal, or rack ends.
• Keep the drive belt correctly tensioned and replace any swollen or cracked hoses to protect the pump and rack.
• Never mix in brake fluid or engine oil, only use the specified ATF.

Looked after, the hydraulic setup on a 1989 Pajero is tough as nails and keeps the big wagon steering sweet on-road and off the beaten track.

Popular questions

What fluid type does a 1989 Mitsubishi Pajero use in the power steering?
Technical manuals for this model specify ATF meeting Dexron II for the power steering system. Many modern ATF products state Dexron III and are generally backward compatible—choose one that clearly lists Dexron II/III on the bottle and avoid generic “universal” fluids that aren’t ATF-based.

How often should the power-steering fluid be changed?
While many owners simply change it when discoloured, a sensible interval is every 2–3 years or about 40,000–60,000 km. Hot climates, towing, or lots of low-speed work justify shorter intervals. Fresh fluid helps the pump run quieter and extends rack seal life.

Where do these systems usually leak?
Common spots include the pump shaft seal, return hose near the reservoir, hose crimps, and the rack end seals. Catching a small weep early prevents pump cavitation and saves the rack from running low on lubrication.