Power transmission fluids having enhanced performance...

Details Power transmission fluids having enhanced performance... Power transmission fluids having enhanced performance...

C - Chemistry, Metallurgy

10

M

C10M 167/00 (2006.01) C10M 127/00 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2162544

Power transmission fluids are described that have a Brookfield viscosity of 13,000 cP or less at -40°C, a viscosity of at least 2.6 mPa.s at 150°C in the ASTM D-4683 method, and a viscosity of at least 6.8 cSt at 100°C after 40 cycles in the FISST of ASTM D-5275. This is achieved by use of particular base oil and additive components in specified proportions. Evaluations to date indicate that the compositions evaluated possess a combination of performance properties deemed necessary by an original equipment manufacturer for a new generation of electronically controlled automatic transmissions equipped with torque converter clutches capable of operating in a continuous slip mode.

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