3-2-489 | Flange Yoke 1480 Ser’ , Bolt Holes: 4 x 0.500 , Bolt Circle Dia 4.750 , Pilot: 3.750M

3-2-489 1480 Series Flange Yoke 4-Bolt Rectangular Pattern 4.750 Bolt Circle

The 3-2-489 is a 1480 series flange yoke with a 4-bolt rectangular bolt pattern. Bolt hole diameter is 0.500" on a 4.750" bolt circle with a 3.750" male pilot diameter. The CJ-to-flat dimension is 1.500". Per the product notes, the rectangular bolt pattern measures 3.053" x 3.639".

Specifications

• Part Number: 3-2-489
• Series: 1480
• Bolt Holes: 4 x 0.500"
• Bolt Circle Diameter: 4.750"
• Pilot Diameter: 3.750" (M)
• Pilot Type: Male
• CJ to Flat: 1.500"
• Notes: Rectangular bolt pattern 3.053" x 3.639"

When fitting the 3-2-489, confirm the companion flange uses the rectangular bolt pattern at 3.053" x 3.639" — this is not a circular bolt pattern, and the holes do not lie on a common bolt circle despite the 4.750" bolt circle reference dimension used for general sizing. The 3.750" male pilot on this yoke requires a matching female pilot bore on the companion flange. Measure both dimensions on the actual flange before ordering.

The 1480 series provides higher torque capacity than the 1410 and is a common specification for heavy-duty North American truck driveshafts. The rectangular bolt pattern of the 3-2-489 is a specific interface geometry — do not substitute a circular 4-bolt yoke of similar bolt circle diameter, as the hole positions will not align. The 1.500" CJ-to-flat dimension sets the available working clearance at this end of the driveshaft.