Castrol ATF Dex III is an automatic transmission and power steering fluid for use in GM automatic transmissions pre 2005 and in many automatic transmissions where DEXRON (II or III) or MERCON performance is required. It is also suitable for many earlier model Japanese vehicles where DEXRON type fluids are recommended. It is recommended for other transmissions where DEXRON and DEXRON II fluids are specified except Mercedes-Benz, ZF, BMW, Voith and Renk.

• Enhanced friction durability prolongs transmission life and promotes smooth shifting
• Increased resistance to oil oxidation and degradation
• Increased clutch band and clutch pack capacity
• Improved protection of copper and bronze components.