4-1-1133-2 Companion Flange Yoke Bore: 1.625 – Keyway: 0.375 – Pilot: 3.750 F

4-1-1133-2 is a critical component in your driveline assembly. This Companion Flange connects to the differential, transfer case, or transmission output, providing a secure interface for yokes or other flanges. When diagnosing driveline vibrations or misalignment issues, a worn or improperly installed flange can be a primary suspect. Symptoms such as vibrations that increase with speed or noise during acceleration may indicate that the flange face is not perpendicular to the rotational axis, leading to runout and imbalance.

This flange features a bolt circle diameter of 4.750″ and a hub diameter of 3.750″, ensuring compatibility with various driveline setups. The pilot diameter of 3.750F and the through hole of 2.500″ allow for precise alignment and secure fastening. Additionally, the keyway measuring 0.375″ provides added stability during operation.

When installing the 4-1-1133-2, ensure that the mating surfaces are clean and free of debris. Torque the bolts in a star pattern to the manufacturer’s specifications to avoid uneven stress on the flange. After installation, check the face runout to confirm proper alignment.

• Bolt Circle Diameter: 4.750″
• Hub Diameter: 3.750″
• Pilot Diameter: 3.750F
• Through Hole: 2.500″
• Keyway: 0.375″

Using the correct Companion Flange, like the 4-1-1133-2, restores the driveline’s integrity and performance, ensuring smooth operation and longevity.