How Often Should I Change Differential Fluid? Fluid change intervals depend on your vehicle, driving conditions and gear oil quality. _by David Hilgendorf|Feb 26, 2023 A differential is a set of gears that allows a vehicle’s driven wheels to revolve…
The Difference Between GL-4 and GL-5 Gear Lube
The Difference Between GL-4 and GL-5 Gear Oil The main difference between GL-4 and GL-5 gear oils is in the level of extreme-pressure (EP) additives. It’s really very simple. They are not interchangeable and GL5 didn’t replace GL4. by Eddie…