Novel power transmission fluids with enhanced lubricating...

Details Novel power transmission fluids with enhanced lubricating... Novel power transmission fluids with enhanced lubricating...

C - Chemistry, Metallurgy

10

M

C10M 141/10 (2006.01) C10M 141/12 (2006.01) C10M 161/00 (2006.01) C10M 163/00 (2006.01) C10M 167/00 (2006.01)

Patent

CA 2254208

Automatic transmission fluids are described which contain a dispersant having a nitrogen to phosphorus mass ratio between about 3:1 and about 10:1, and at least one friction modifier. The use of dispersants having a nitrogen to phosphorus mass ratio between about 3:1 and about 10:1 provides automatic transmission fluids which exhibit good anti-shudder properties as well as a higher mid-point torque, a higher static torque in shifting clutch applications and better frictional durability as compared to similar automatic transmission fluids which contain dispersants having a nitrogen to phosphorus mass ratio of less than 3:1.

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