3R02-21 – Flange Yokes – 3R Series – Pilot Dia 3.125-F – Bolt Circle Dia 4.250

When a 3R 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 3R02-21 flange yoke is the spec-correct replacement — correct bolt circle, correct pilot, correct series. Dimension confirmation before ordering is still the right call.

3R02-21 Flange Yoke — 3R Series Specifications & Fitment

The 3R series covers metric 3-bolt flange — European and import platforms. The 3R02-21 flange yoke specs: 4.250 bolt circle | 3.125-F pilot | 4x0.455 bolt holes | 1.687" CJ-to-flat. SAGINAW - NON CV FLANGE. 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 3R02-21 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: 3R — built for metric 3-bolt flange — European and import platforms
• Bolt circle: 4.250 — must match axle/diff flange hole pattern exactly
• Pilot dia: 3.125-F — centers yoke on companion flange, no play allowed
• 4 bolt holes at 0.455 — verify hole count and size
• CJ-to-flat: 1.687" — affects driveshaft working angle clearance
• Brand: UDS — direct-fit replacement
• Note: SAGINAW - NON CV FLANGE

Specifications

• SKU: 3R02-21
• Brand: UDS
• Series: 3R
• Bolt Circle: 4.250
• Pilot Dia: 3.125-F
• Bolt Holes: 4
• Bolt Hole Dia: 0.455
• CJ to Flat: 1.687"
• Notes: SAGINAW - NON CV FLANGE