POWER TRANSMISSION FLUIDS WITH ENHANCED ANTI-SHUDDER CHARACTERISTICS

摘要

A power transmission fluid composition having improved characteristics. T he fluid may comprise a base oil and an additive composition including a viscosity index improving amount of a polyisoalkylene component having a molecular weight ranging from about 300 to about 3000 weight average molecular weight as determined b y gel permeation chromatography. The power transmission fluid exhibits a kinematic viscosity (KV at 100.degree.C) of less than about 9 centistokes and a Brookfield viscosity (BV at -40.degree.C) of less than about 30,000 centipoise. Also the friction versus velocity curve for the fluid has a more positive slope at high speeds compared to similar fluid s in the absence of the polyisoalkylene component.