18 LS430 − NEW FEATURES 3. ATF WS The ATF WS has been adopted to reduce the resistance of the ATF and improve fuel economy by reducing its viscosity in the practical operating range. At the high-temperature end, its viscosity is the same as that of the ATF Type T-IV, which ensures the durability of the automatic transmission. There is no interchangeability between the ATF WS and other types of ATFs (ATF Type T-IV, D-II.) 2 Viscosity : ATF Type T-IV : ATF WS Reduced Viscosity High High Temperature 259LSK03 Service Tip If a vehicle with a transmission filled with ATF WS is replenished with another type of ATF, the vehicle might not start off at extremely low temperatures.
However, it will start off after it has been warmed up for a few minutes. 4. Torque Converter A compact, lightweight and high-capacity torque converter. The torque converter clutch supports flex lock-up clutch control, thus improving the fuel economy. Specification Turbine Runner Lock-up Clutch Pump Impeller Stator One-way Clutch 259LSK05 Model ’04 LS430 ’03 LS430 A/T A761E A650E Type 3-Element, 1-Step, 2-Phase Stall Torque Ratio 1.85 Dry Weight kg (lb) 15.4 (34.0) 16.2 (35.7)