3502-256 – Flange Yokes – 1350 Series – Bolt Circle Dia 4.250″ – Pilot Dia 2.559, F

The 3502-256 flange yoke is the direct bolt-on connection between your 1350 series driveshaft and the differential or axle housing flange. Bolt circle and pilot diameter are the two specs that determine whether this part fits — everything else is secondary. The 3502-256 flange yoke is machined to one specific set of dimensions, and those dimensions have to match your axle flange exactly.

3502-256 Flange Yoke — 1350 Series Specifications & Fitment

The 1350 series covers 3/4-ton trucks — F-250, Ram 2500, Dana 44/60 axles, performance 4x4. The 3502-256 flange yoke specs: 4.250 bolt circle | 2.559 pilot | 4x0.500 bolt holes | 1.618" 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 3502-256 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: 1350 — built for 3/4-ton trucks — F-250, Ram 2500, Dana 44/60 axles, performance 4x4
• Bolt circle: 4.250 — must match axle/diff flange hole pattern exactly
• Pilot dia: 2.559 — centers yoke on companion flange, no play allowed
• 4 bolt holes at 0.500 — verify hole count and size
• CJ-to-flat: 1.618" — affects driveshaft working angle clearance
• Brand: UDS — direct-fit replacement

Specifications

• SKU: 3502-256
• Brand: UDS
• Series: 1350
• Bolt Circle: 4.250
• Pilot Dia: 2.559
• Bolt Holes: 4
• Bolt Hole Dia: 0.500
• CJ to Flat: 1.618"