3102-40 – Flange Yokes – 1310 Series – Bolt Circle Dia 3.250″ – Bolt Hole Dia 0.385

When a 1310 series flange yoke fails, the symptoms show up fast: driveline clunk under acceleration, vibration that doesn't go away with speed changes, or visible play at the diff flange. The 3102-40 flange yoke is the spec-correct replacement — correct bolt circle, correct pilot, correct series. Dimension confirmation before ordering is still the right call.

3102-40 Flange Yoke — 1310 Series Specifications & Fitment

The 1310 series covers light-duty trucks — F-150, Silverado 1500, Jeep Wrangler, Ram 1500. The 3102-40 flange yoke specs: 3.250 bolt circle | 4.000 pilot | 4x0.385 bolt holes | 2.750" 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 3102-40 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: 3.250 — must match axle/diff flange hole pattern exactly
• Pilot dia: 4.000 — centers yoke on companion flange, no play allowed
• 4 bolt holes at 0.385 — verify hole count and size
• CJ-to-flat: 2.750" — affects driveshaft working angle clearance
• Brand: UDS — direct-fit replacement

Specifications

• SKU: 3102-40
• Brand: UDS
• Series: 1310
• Bolt Circle: 3.250
• Pilot Dia: 4.000
• Bolt Holes: 4
• Bolt Hole Dia: 0.385
• CJ to Flat: 2.750"