Automatic Transmission Fluids–Properties and Performance

Automatic transmission fluids are specially designed to meet the many different requirements of automatic transmissions. This paper describes the properties of such fluids, the types of additives used to formulate them, and the tests used to evaluate ATF's. Also described are the powershift transmission fluids, Allison C-3 and Caterpillar TO-2, which are used in truck, bus, and heavy equipment transmissions.