Purpose and Specifications

LIQUI MOLY 4421 75W140 LS 1L is a fully synthetic transmission oil designed for hypoid axles, rear axles, differentials, and limited-slip (LS) systems in cars, trucks, and motorcycles. It meets API GL5 standards and excels in high-load conditions like racing or heavy towing.

• Flows smoothly at cold starts down to -40°C, preventing hard shifts in winter.
• Stays thick and protective up to over 220°C, handling extreme heat from track use or steep grades.
• Reduces gear noise, cuts friction for better fuel economy, and shields against wear and rust.
• Compatible with seals, supports extended drain intervals up to 100,000 km or 5 years under normal driving.

When to Use / Replace?

Use this oil in final drives with or without wet clutches, especially for BMW, Ford, Scania, ZF-approved systems under high pressure. Replace every 60,000-100,000 km or every 3-5 years, or sooner if you tow heavy loads, race, or notice whining gears/noise. Shelf life is 5 years unopened in cool storage.

FAQ

Q: Is this safe for limited-slip differentials?
A: Yes, the LS formula ensures proper friction for clutch-type LSDs without slippage.

Q: Can I mix it with regular gear oil?
A: Small amounts are okay during changes, but for best results, use pure to maximize protection.

Q: What vehicles fit this oil?
A: Ideal for passenger cars, light trucks, and bikes with hypoid gears; check your manual for ZF TE-ML or API GL5 match.