Motor Oil Info

The use of automatic transmissions can be found in virtually every transportation and mobile equipment application. Just as the designs of such equipment vary, so do the demands placed upon the required lubricants.

Viscosity requirements for an automatic transmission differ by application. these products are typically multi-viscosity fluids. However, single grades fluids are also commonplace. The multi-viscosity products generally contain viscosity index improvers which allow for the low temperature performance typically required of ATF fluids.

The low temperature properties of an Automatic Transmission Fluid have become increasingly important in recent years. For example, one of the key differences between Dexron II and Dexron III fluids recommended by General Motors is the increased ability of the Dexron III product to function at lower operating temperatures. The same holds true for the Mercon and Mercon V fluids, which are recommended by Ford.

The coefficient of friction of a fluid affects the shifting characteristic of an automatic transmission. Whether the shifting characteristics of a transmission are smooth and subtle or aggressive will depend on its design and the fluid used. It is, therefore, prudent to use a fluid matching the requirements of the transmission manufacturer.