SKU: BPO77326-12
MPN: 77326
The 80w90 Limited Slip Gear Case 12 x 1 Qt. GL-5 by PennGrade Motor Oil is engineered for drivers and mechanics who demand reliable differential protection in high-stress driving conditions. This premium gear oil is formulated specifically for limited-slip differentials, which require specialized additives to prevent chatter, noise, and premature wear during aggressive cornering, towing, and acceleration. Whether you're upgrading a street performance vehicle, maintaining a truck used for hauling, or servicing a track-focused build, this gear oil addresses the unique demands that standard differentials cannot handle.
PennGrade's 80W-90 viscosity rating provides optimal film strength across a wide temperature range, critical for differentials that generate intense heat under load. The GL-5 specification includes anti-scuff, anti-wear, and anti-foam additives that protect gear teeth and bearing surfaces from micro-welding and oxidative breakdown. The limited-slip friction modifiers in this formulation reduce the noise and vibration typical of clutch-type differentials during tight turns, while maintaining the viscosity stability necessary for sustained high-output applications. Each case contains 12 quarts, providing convenient coverage for most differential service intervals or allowing inventory for multiple vehicles.
Mechanics and performance enthusiasts benefit most from this product when servicing rear-axle assemblies in muscle cars, lifted trucks, off-road vehicles, and modified sport compacts. The 80W-90 weight is ideal for differentials operating in moderate to hot climates or seeing consistent high-rpm use, ensuring adequate gear protection without sacrificing fuel economy. Before installation, verify that your vehicle's differential is rated for GL-5 gear oil and that a limited-slip unit is present—standard open differentials may require different formulations. Proper fill level and periodic service intervals maximize the longevity of gear teeth and internal clutch surfaces.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
