Illinois Auto Truck Co., Inc. (IATCO) has been in business since 1939 and focuses exclusively on the manufacturing of NEW clutch assemblies, components, and supplemental parts for class 6, 7, & 8 vehicles. Illinois Auto Truck has grown to be a fourth generation family owned company dedicated to quality, customer service and growth in the heavy & medium duty clutch market. All of the materials used in the manufacturing process are of the highest quality known in the clutch industry. Throughout the world we are known as “Best in the Clutch”.