Power steering pump fluid (ГУР)

Tags: #power-steering · #gur · #atf

Power-steering pump fluid specification: ATF-MV type (M-5 variant). Acceptable alternatives: fluids meeting the 3309 approval standard, Toyota Type 4 (T4), or multi-spec ATF fluids that meet the 3309 standard ¹².

Hissing vs. whistling — telling a normal sound from an air-in-system problem. A hissing sound from the cabin during a full-lock steering turn is normal behavior for the X80's power-steering system — it is not a defect and shouldn't be diagnosed as one ³⁴⁵. A whistling sound, by contrast, is a different symptom and indicates air in the system: if you hear whistling (not just hissing), check fluid level and bleed the system by rotating the wheel lock-to-lock several times with the engine running ⁶⁵. Merely loud hissing without whistling may instead point to dirty fluid rather than air — cycling the wheel lock-to-lock while topping up/replacing fluid can flush it: one owner reported doing this twice (removing the lower hose from the reservoir, turning the wheel, refilling) specifically to purge contaminated fluid, using the same fluid spec noted above (3309/Toyota Type 4-compatible) ⁷.

Related pages

• Power steering fluid — service procedure
• Power steering pump failure — warranty denials
• Power steering hose — replacement vs. re-crimping
• Power steering pump and line issues
• ATF and power-steering fluid — Dexron III vs JWS3309

Sources

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Last updated: 2026-07-24