NAVISTAR issued a recall on the 38004700, and 4900 models

On certain vehicles, the transmission flange, parking brake drum and transmission yoke are connected by eight bolts. If the brake drum or transmission yoke are not properly seated when the bolts are installed, subsequent driveline torque applied to the joint will cause the mating parts to fully seat, resulting in loose bolts. Loose bolts can eventually work out or shear resulting in the drum and driveshaft separating from the vehicle which could potentially cause vehicle damage or personal injury or both. Correction: Vehicles will have the torque inspected and be retorqued to specification.