2-1-1313-4 Companion Flange Yoke – Bore: 1.250 , Keyway 0.312 , Pilot: F-2.375

The 2-1-1313-4 Companion Flange is a critical component in your driveline assembly, ensuring proper alignment and reducing vibration. This flange bolts directly to the differential, transfer case, or transmission output, providing a reliable connection to yokes or other flanges. With a pilot diameter of 2.375" and a bore diameter of 1.250", it’s designed to fit seamlessly into various configurations. When installing the 2-1-1313-4, attention to detail is paramount. The flange face must be perfectly perpendicular to the rotational axis; any runout can lead to unwanted vibrations that affect performance and longevity. To ensure a solid installation, clean all mating surfaces thoroughly and torque the bolts in a star pattern for even pressure distribution. After installation, checking the face runout is crucial to confirm that everything is aligned correctly.

• Pilot Diameter: 2.375"
• Bore Diameter: 1.250"
• Bolt Circle Diameter: 3.125"
• Outside Diameter: 3.875"
• Keyway: 0.312"

In applications where precision is key, such as in performance builds or heavy-duty fleets, the 2-1-1313-4 Companion Flange is indispensable. Its robust design and exact specifications ensure that it can handle the demands of high-torque environments while maintaining optimal driveline function.