Lucas Oil 75W-90 Trans & Diff Lube - Synthetic Gear Oil, 1 QT, High-Temp Protection & Limited-Slip Compatible

Lucas Oil 75W-90 Trans & Diff Lube is a synthetic gear oil engineered to protect gears under extreme pressure, reduce wear, and maintain smooth operation in transmissions and limited‑slip differentials.

Built as a non‑foaming, super‑slick formula, this 75W‑90 gear oil is formulated for heavy‑duty and high‑performance applications where conventional gear lubes fail to deliver consistent protection. Its specialized additive package cushions gear teeth, resists squeeze‑out under high loads, and sustains lubricity at elevated temperatures, making it a reliable choice for vehicles, trucks, and performance drivetrains that demand extra durability.

How does this oil protect gears under heavy loads?

The product includes extreme‑pressure additives that form a protective film on gear surfaces, reducing direct metal‑to‑metal contact during shock loads and high torque events. Its non‑foaming base keeps the film intact so protection remains consistent even in severe service.

• Extreme‑pressure chemistry cushions gear teeth under shock loading
• Non‑foaming formulation preserves film strength and lubrication
• Stable viscosity at operating temperatures ensures consistent protection

Will Lucas 75W‑90 work in limited‑slip differentials?

Yes — this gear lube is formulated to be excellent for limited‑slip differentials, providing the right frictional properties to allow clutch packs and limited‑slip mechanisms to operate smoothly. It reduces chatter and helps maintain predictable differential behavior while protecting internal components.

• Compatible with many limited‑slip designs to reduce noise and chatter
• Additives balance friction control with anti‑wear protection
• Replaces OEM number Lucas Oil: 10047 for direct fitment in specific applications

How does the oil hold up to high temperatures and long service intervals?

The synthetic base and heat‑resistant additive package help the lubricant retain its lubricity at elevated temperatures, reducing breakdown and varnish. That thermal stability supports longer service life and dependable performance in severe or sustained high‑heat conditions.

• Synthetic formulation resists thermal breakdown during prolonged use
• Maintains viscosity to ensure consistent film strength under heat
• Reduces the frequency of top‑ups and helps extend drain intervals when used per manufacturer guidelines

How easy is it to use this gear oil in my vehicle?

Lucas 75W‑90 is offered for vehicle‑specific fitment and replaces certain OEM part numbers to simplify selection. Packaging may vary, but the product pours smoothly and is compatible with typical gear oil fill and change procedures used in transmissions and differentials.

• Vehicle specific fit type for straightforward selection and use
• Replaces OEM Lucas Oil number 10047 for compatible models
• Available in standard gear oil containers that pour cleanly for service

Who is this for: Drivers, fleet managers, performance tuners, and mechanics who need a durable, synthetic 75W‑90 gear lubricant for heavy‑duty, high‑temperature, or limited‑slip applications. If you need a long‑lasting, non‑foaming gear oil that cushions gears under pressure and helps prevent wear in demanding service, Lucas Oil 75W‑90 Trans & Diff Lube is formulated for that purpose. Always consult your vehicle manufacturer for recommended viscosities and service intervals before changing lubricants.