Delvac 1 Transmission Fluid 40 is a fully synthetic manual transmission fluid engineered to deliver exceptional performance in demanding applications. This SAE 40 viscosity lubricant is specifically formulated to meet the rigorous requirements of heavy-duty manual transmissions operating in both on-highway and off-highway equipment. The advanced synthetic formulation provides superior protection across a wide range of operating temperatures and conditions, helping to extend transmission life and maintain optimal performance. This transmission fluid meets or exceeds API MT-1 specifications and is approved for use in various transmission types including Allison TES 439, Eaton PS-386, MACK TO-A PLUS, Meritor O-81, and Navistar MPAPS B-0116 Type 2. The 1-gallon container offers convenient handling and storage for professional mechanics and fleet maintenance operations. Designed for year-round lubrication of manual transmissions in light to severe duty applications, Mobil Delvac 1 Transmission Fluid 40 helps ensure smooth shifting and reliable operation even under the most challenging conditions.