GP-1 85w140 Gear Oil Case 12 x 1 Quart

The GP-1 85W140 Gear Oil Case delivers professional-grade lubrication for high-performance differentials, transfer cases, and manual transmissions where extreme pressure and heat demand premium protection. This 12-quart case format makes it ideal for fleet maintenance, serious enthusiasts, and shops performing differential service on modified vehicles running aggressive gear ratios or towing applications. Whether you're maintaining a lifted truck, a high-horsepower muscle car, or a trail-ready off-road rig, having a full case on hand ensures you're never caught short during critical drivetrain work.

Formulated by DRIVEN Racing Oil, the 85W140 viscosity rating provides superior film strength across temperature extremes—the 85W winter rating ensures cold-start pumpability while the 140 hot rating maintains a robust protective layer under sustained high-load conditions. The synthetic blend construction resists thermal breakdown and oxidation, critical when gears generate sustained friction and heat during spirited driving, towing, or competition use. Advanced anti-wear and extreme-pressure additives protect ring gears and pinion teeth from scuffing, especially important when running limited-slip or locking differentials that increase shear stress on gear surfaces.

This case specification fits most modern and classic vehicles requiring 85W140 gear oil, including Ford 9-inch differentials, GM 12-bolt rears, Dana axles, and Chrysler 8.75-inch applications across trucks, Jeeps, and performance cars. The individual one-quart bottles provide convenient portability and clean handling—no messy bulk containers—making it simple to carry spares in your vehicle or garage. When upgrading gearing, servicing after extended off-road use, or maintaining a high-output engine platform, the GP-1 85W140 case ensures your drivetrain receives consistent, factory-quality lubrication without multiple smaller purchases.