While many modern transmissions and differentials require 75W-140 or 80W-90 gear oil, older muscle cars or heavy-duty trucks might necessitate a 90W or 140-grade lubricant. They maintain consistent viscosity in extreme cold and hot environments, providing a performance edge for off-road enthusiasts or those living in climates with severe temperature fluctuations.
Extreme Temperature Protection for Your Drivetrain
If you notice a whining or howling noise emanating from the rear of the vehicle during acceleration, this is a classic sign that the gear oil is losing its viscosity. The Maintenance Procedure Changing gear oil is a messy but rewarding task for the DIY mechanic.
Valvoline formulations address this by creating a resilient film that absorbs shock and prevents surface fatigue. Synthetic options, such as those featuring advanced ester or PAO base stocks, offer superior thermal stability and oxidation resistance.
Extreme Temperature Protection for Drivetrain Performance
Because gear oil is highly viscous, it is crucial to allow the old oil to drain completely before refilling with the new Valvoline product. Understanding the Role of Gear Lubricant Unlike engine oil, which primarily focuses on cleaning and cooling, gear oil's primary mission is lubrication under shock loads.
More About Valvoline gear oil
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