GEAR-HD Differential Fluid is a Maximum Performance 85w-140 GL5 semi-synthetic lubricant for heavy duty differentials. GEAR-HD offers radically increased performance for any differential by minimizing friction and maximizing lubricant film strength to provide an increased load capacity that no other product on the market can come close to offering. The shock load capability has also been increased (without increasing the viscosity of the oil) to a level that allows gears and bearings to operate problem free even in the most demanding environment.
Simply put, GEAR-HD Differential Fluid provides the features that protect even the most highly modified vehicles differentials against catastrophic failure and extreme component wear while putting all the power to the ground as it should be.

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