Illinois Auto Truck (IATCO) is a US manufacturer of heavy-duty clutches and automated-transmission clutch components for Class 6 to 8 trucks. We stock IAT 14-inch and 15.5-inch dual- and single-plate clutches, Eaton Endurant clutch-and-flywheel assemblies, clutch brakes and release bearings, plus clutch solenoid valves and actuators for Volvo I-Shift and Mack mDrive automated transmissions. Fitment across Volvo, Mack, PACCAR and Navistar. In stock and shipped same day with OE cross-references — the dependable source for semi truck clutches and AMT clutch valves.