FS Uni-Drive TO-4 Fluid is a heavy-duty drive train lubricant designed primarily for use in transmissions, hydraulic systems, differentials, and final drives of Caterpillar equipment. It possesses the required wear, oxidation, deposit control, frictional characteristics, and seal compatibility as set forth in the Caterpillar specification TO-4.
It will provide excellent service in both new and older Caterpillar equipment. It also meets the Allison C-4 requirements for use in Allison power shift transmissions.
This oil is also recommended for use in some manual transmissions where the following combinations of specifications are allowed: GL-1, API CD, Cat TO-2. However, it should not be used to top-up gear oils in these applications.