Shift-feel durability enhancement

Abstract From the Canadian patent

Abstract of the Disclosure Improved durability of shift-feel frictional characteristics in automotive transmission fluids is achieved by use of an initially substantially inert (friction-wise) compound -- viz. an aliphatic tertiary amine having one long chain and two short chain groups -- incorporated into a formulation which is otherwise balanced for initially good shift-feel frictional properties. When the fluid is subjected to the oxidative and thermal degradation conditions encountered under normal service conditions the, friction modifiers that give the fluid good initial shift-feel frictional properties degrade. However as, this occurs the aliphatic tertiary amine has itself been …