Purpose and Specifications

WOLF EXTENDTECH 80W90 GL 5 is a tough transmission oil built for heavy-duty gearboxes in trucks, buses, agriculture, and off-road vehicles. It handles high speeds, shock loads, and high torque at low speeds without breaking down, ensuring smooth gear shifts and long-lasting protection for hypoid gears, spiral bevel gears, worm wheels, and transaxles.

This 20L drum delivers reliable performance from -33°C cold starts up to 210°C operating temps, keeping gears lubricated in extreme conditions. Approved for ZF TE-ML 05A, 07A, 12E, 16B, 16C, 17B, 19B, API GL-5, MIL-L-2105 C/D, and MAN 342 M-1/M-2 specs, it prevents wear and extends service life up to 200,000 km or 24 months in standard fleet use.

When to Use / Replace?

• Use it when: Your vehicle manual lists GL-5 or matching ZF/MAN specs for manual transmissions, axles, or differentials under heavy loads like towing, hauling, or rough terrain.
• Replace every: 100,000-200,000 km or 12-24 months, or sooner if you notice hard shifting, grinding noises, or dark/discolored fluid during inspections.
• Shelf life: 5 years unopened in cool, dry storage.

FAQ

Is this oil good for limited-slip differentials?
Standard EXTENDTECH 80W90 GL 5 works for most hypoid setups; for limited-slip, check the LS version for better friction control.

Can I use it in older trucks?
Yes, its MIL-L-2105 C/D approvals make it perfect for classic diesels and manuals from the 80s onward.

What if my temps drop below freezing?
It flows easily down to -33°C, protecting startup lubrication in winter conditions.