Purpose and Specifications

LIQUI MOLY 4427 GL3+ 75W-80 1L is a fully synthetic gear oil designed for manual transmissions and transfer cases in trucks and heavy-duty vehicles. It ensures smooth gear shifts by providing the right friction for synchronizers across a wide temperature range from -40°C to 150°C, while offering excellent wear protection and corrosion resistance for long-lasting components.

This 1-liter bottle meets API GL3+ standards and is approved for major brands like MAN 341 E3/Z3, Volvo 97305, ZF TE-ML 02D/08, DAF, IVECO, Renault Trucks, and Eaton extended drain up to 300,000 km.

• Flows easily in cold starts for quick protection
• Stays thick under high heat and heavy loads
• Reduces wear for quieter, precise shifting
• Supports extended service up to 300,000 km or 3 years

When to Use / Replace?

Use this oil in manual truck transmissions requiring GL3+ specs, especially for stiff shifting or long-haul operations. Replace every 300,000 km, 36 months, or sooner if you notice grinding gears, hard shifts, or fluid darkening – typically check at 100,000 km intervals.

Shelf life is 5 years unopened when stored cool and dry. Ideal for fleet maintenance to minimize downtime.

FAQ

Q: Is this safe for my truck's manual gearbox?
A: Yes, it's approved for DAF, IVECO, MAN, Volvo, ZF, and more – perfect for heavy-duty use with extended intervals up to 300,000 km.

Q: What if shifting feels stiff in winter?
A: The 75W flows smoothly at low temps down to -40°C, fixing cold-weather shift issues while protecting at high loads.

Q: How often should I change it?
A: Every 300,000 km or 3 years for Eaton specs; inspect fluid color and level every 100,000 km for best results.