3302-256 – Flange Yokes – 1330 Series – Bolt Circle Dia 4.250″ – Pilot Dia 2.559, F

When a 1330 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 3302-256 flange yoke is the spec-correct replacement — correct bolt circle, correct pilot, correct series. Dimension confirmation before ordering is still the right call.

3302-256 Flange Yoke — 1330 Series Specifications & Fitment

The 1330 series covers light-to-medium duty trucks and GM half-ton platforms. The 3302-256 flange yoke specs: 4.250 bolt circle | 2.559 pilot | 4x0.500 bolt holes | 1.644" 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 3302-256 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: 1330 — built for light-to-medium duty trucks and GM half-ton platforms
• 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: 1.644" — affects driveshaft working angle clearance
• Brand: UDS — direct-fit replacement

Specifications

• SKU: 3302-256
• Brand: UDS
• Series: 1330
• Bolt Circle: 4.250
• Pilot Dia: 2.559
• Bolt Holes: 4
• Bolt Hole Dia: 0.500
• CJ to Flat: 1.644"