3102-185 Flange Yoke 1310 , Toyota with Bolt Circle Diameter: 3.661, Pilot: 1.811 Square Pattern

The 3102-185 flange yoke mounts to the companion flange or axle housing and carries the driveshaft end u-joint. It's not a universal part — the bolt circle, pilot diameter, and series are all specific. Vibration that tracks with vehicle speed and stays consistent under load often starts right here, at a worn or mis-seated flange yoke. The 3102-185 flange yoke is the correct replacement.

3102-185 Flange Yoke — 1310 Series Specifications & Fitment

The 1310 series covers light-duty trucks — F-150, Silverado 1500, Jeep Wrangler, Ram 1500. The 3102-185 flange yoke specs: 3.661 bolt circle | 1.811 pilot | 4x0.445 bolt holes | 1.634" CJ-to-flat. Pilot diameter is what centers the yoke on the companion flange — that dimension must match exactly or the driveshaft will run off-center at speed. Bolt circle determines your hole pattern match.

Before ordering the 3102-185 flange yoke, measure your diff flange bolt circle and pilot diameter directly. Don't rely on series designation alone — after an axle swap, the flange dimensions may differ from the original factory spec. Brand: UDS. Verify, then order.

Key Features

• Series: 1310 — built for light-duty trucks — F-150, Silverado 1500, Jeep Wrangler, Ram 1500
• Bolt circle: 3.661 — must match axle/diff flange hole pattern exactly
• Pilot dia: 1.811 — centers yoke on companion flange, no play allowed
• 4 bolt holes at 0.445 — verify hole count and size
• CJ-to-flat: 1.634" — affects driveshaft working angle clearance
• Brand: UDS — direct-fit replacement

Specifications

• SKU: 3102-185
• Brand: UDS
• Series: 1310
• Bolt Circle: 3.661
• Pilot Dia: 1.811
• Bolt Holes: 4
• Bolt Hole Dia: 0.445
• CJ to Flat: 1.634"