HIGHTEC TOPGEAR HC-LS 75W-90 is a high-performance multi-grade gear oil based on HC-synthetic technology. It is formulated specifically for axle drives fitted with a limited-slip differential, where it delivers smooth, judder-free operation alongside strong wear protection. The fluid also keeps gear changes easy in the cold and helps reduce drivetrain friction.

Purpose and specifications

This gear oil is intended for manual gearboxes and axle gears with or without a limited-slip differential. It meets API GL4, API GL5 and the limited-slip class API GL-5 LS, and complies with MIL-L-2105 D. The dedicated LS additive package provides the controlled friction behaviour that locking and limited-slip differentials require.

• 1L container for a complete axle or gearbox oil change
• 75W-90 grade ensures easy shifting from approximately -40 C up to high operating temperatures
• LS-specific additives prevent chatter and protect clutch packs in limited-slip differentials
• HC-synthetic base reduces friction and supports fuel savings

When to use / change?

Choose this oil when your differential or gearbox specifies a 75W-90 GL5 LS gear oil. Typical replacement intervals are around 60,000 km or as defined by the manufacturer's service schedule. It performs reliably from about -40 C to +140 C. Unopened and stored cool and dry, shelf life is approximately 5 years.

Frequently asked questions

What does the LS designation mean?
LS stands for limited slip; the oil contains friction modifiers tuned for limited-slip and locking differentials to prevent noise and chatter.

Can I use it in a standard differential without LSD?
Yes, it also meets GL4 and GL5, so it is suitable for conventional axles and manual gearboxes.

Is it good for cold weather?
The 75W-90 grade keeps shifting smooth at low temperatures down to roughly -40 C.

Suitable for: vehicles with manual gearboxes and limited-slip differentials requiring API GL5 LS. Always verify the exact approval against your vehicle's owner manual before use.