Illinois Auto Truck Co., Inc. (IATCO) was founded in 1939 by Fred Greenberg as an independent truck parts jobber in the Chicagoland area. Early in the 1940’s IATCO began manufacturing and supplying replacement components for the rebuilding of heavy duty clutches.
Fred Greenberg’s son-in-law, Leonard F. Stein, joined the company in 1946. Later in the 1960’s the truck parts jobbing aspect of Illinois Auto Truck wound down in favor of concentrating on the manufacturing of heavy duty replacement clutch components.
The company evolved from not only supplying components to the remanufacturing industry but to also assembling those components into complete clutch assemblies to supply the heavy & medium duty clutch market.
IATCO’s current President, Jordan R. Stein, joined the company in 2008 and represents the fourth generation of Illinois Auto Truck, taking over the role from his father, Richard H. Stein, in 2026.
Aside from its many independent customers, Illinois Auto Truck also boasts supplying many private label brands to a number of Original Equipment Truck Manufacturers to service their aftermarket dealer requirements. In doing so, IATCO has proudly been named “Supplier of the Year” twice for Paccar Parts. More recently, Illinois Auto Truck has been named a supplier for Daimler Trucks North America as well as a supplier for Navistar Dealers in the international market. IATCO is also the preferred NEW clutch supplier for VIPAR Heavy Duty, and HDA Truck Pride.
In April 2018, Illinois Auto Truck completed a successful ISO audit that resulted in a certification under the ISO 9001:2015 standard.
IATCO’s unsurpassed customer service, on time delivery and technical expertise has truly made them “Best in the Clutch”.
