Full Synthetic Heavy ShockProof Gear Oil (5 gal) has polyol ester base stocks, friction modifiers for clutch-type limited slip differentials, superior shear stability, reduced oxidation, & thicker oil between gear teeth.

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Top Fuel Dragsters use it. You might be a candidate, too. This Heavy Shockproof Gear Oil contains the extreme pressure additives necessary for ultimate protection for road cars and racing vehicles, as well as friction modifiers for proper limited-slip operation. Heavy ShockProof Gear Oil has film thickness greater than an SAE 75W250, yet low fluid friction like 75W90. This product has many performance racing applications like Sprint/Midget/Dirt Late Model Differentials, Detroit Lockers and spools, NHRA Top Fuel, and Funny Car rear ends. It is not recommended for most synchro applications due to the product's extreme slipperiness.

• Full synthetic
• High viscosity-index
• Relatively constant viscosity & film thickness with varying temp change
• Ester base stocks
• Friction modifiers
• Superior shear stability
• Less oxidation
• Exceeds API GL-5 specs
• Longer drain intervals

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Information:

Film thickness greater than an SAE 75W250, yet low fluid friction like 75W90; Many performance racing applications like Sprint/Midget/Dirt Late Model Differentials, Detroit Lockers and spools, NHRA Top Fuel and Funny Car rear ends; Not recommended for most synchro applications due to the product's extreme slipperiness; Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions; High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change; Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears; Superior shear stability and reduced oxidation compared to other synthetics and conventional gear oils; Exceed API GL-5 specifications; Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear.