AML 4G4319A509/AA/S

Specification AML 4G4319A509/AA/S is an Allison transmission manufacturer approval that defines the requirements for hydraulic and automatic transmission oil. Oils that meet this standard must have a viscosity corresponding to SAE 6 W (or equivalent), high thermal resistance, stability under high loads, protection against wear and corrosion, as well as a specific friction coefficient required for proper operation of friction elements and the torque converter. AML 4G4319A509/AA/S is intended for Allison automatic transmissions C‑3, C‑4, C‑4‑S and similar models installed in medium and heavy‑duty trucks, buses and special equipment, including DAF, Detroit Diesel and other OEM systems that use this approved oil. Using a lubricant with this approval guarantees stable transmission operation, prevents overheating and wear of friction discs, and also maintains compatibility with post‑catalytic cleaning systems, if present.