A New Automatic Transmission Fluid with Extended Friction Durability and Minimal Temperature Dependence 2008-01-1728
This laboratory presents a new step-automatic transmission fluid with enhanced friction durability and robustness for the Asian marketplace. This mineral-oil-based fluid also meets JASO M315-1A performance requirements on torque capacity, anti-oxidation, anti-wear, extreme pressure (EP), anti-aeration/foam control, copper corrosion and anti-rust performance. The fluid offers a JASO M349 low velocity friction apparatus (LVFA) durability lifetime of over 1100 hours. Moreover, this fluid maintains stable torque capacity during its entire LVFA durability lifetime, across the temperature range of 40 to 120 °C. Similarly, friction level changes with sliding speed are smaller than experienced by other commercial factory-fill ATFs. These critical performance features are due to a new fluid friction system approach, which may enable new types of transmission hardware or calibration.
Citation: Tersigni, S., Saathoff, L., Cleveland, C., Tang, H. et al., "A New Automatic Transmission Fluid with Extended Friction Durability and Minimal Temperature Dependence," SAE Technical Paper 2008-01-1728, 2008, https://doi.org/10.4271/2008-01-1728. Download Citation
Samuel H. Tersigni, Lee D. Saathoff, Christopher S. Cleveland, Hong-Zhi Tang, Mark S. Jones, Kenji Yatsunami
Afton Chemical Corporation, Afton Chemical Limited, Afton Chemical Japan Corporation
2008 SAE International Powertrains, Fuels and Lubricants Congress