Case, Differential 3.91-4.56 Ratio 1681805C91

The Navistar International Case, Differential 3.91-4.56 Ratio (1681805C91) is a rear axle differential case designed to house and protect the internal gearing that transmits torque to the vehicle’s wheels. It serves as a critical component in the drivetrain, enabling torque distribution and rotational speed adjustment between wheels for improved traction and vehicle control.