4102-1242 – Flange Yokes – 1410 Series – Bolt Circle Dia 4.000″ – Bolt Hole Dia 0.480

4102-1242 -- Forged Flange Yoke for 1410 Series Drivetrain Systems

The choice between a slip yoke and a flange yoke is not cosmetic -- it defines how the driveshaft is supported and serviced at that end. The 4102-1242 is the flange yoke solution for 1410 series builds, providing a rigid, bolt-on interface with a 3.150" male (raised) pilot and 4-bolt pattern on a 4.000" bolt circle with 0.480" bolt holes. It eliminates the axial float of a slip yoke, making it the right choice for front driveshafts, short shafts, and any application where positive axial location is required.

Dimensions at a Glance

Forged Steel Advantages

Cast yokes fracture along crystal boundaries under shock load. Forged yokes, including the 4102-1242, have aligned grain structure that absorbs impact and distributes stress rather than concentrating it. In off-road, heavy towing, and performance applications, this is the difference between a yoke that survives a jolt and one that does not. The material is carbon steel, processed to the hardness range specified for 1410 series operating conditions.

Measurement Verification Steps

• Use calipers to confirm companion flange bolt circle is 4.000" PCD -- not nominal, actual measured
• Count bolt holes on companion flange and match to the 4 holes on this yoke
• Check pilot diameter: companion flange must accept a 3.150" male (raised) pilot
• Measure CJ-to-flat on existing yoke; 2.170" is the value to match
• Confirm ear bore size is correct for your 1410 series u-joint cross kit

Direct Replacement and Custom Builds

The 4102-1242 ships ready to bolt on. No secondary machining is required for standard companion flanges matching the above specs. For custom driveshaft builders, it offers a predictable starting point with known dimensions, allowing the rest of the shaft to be designed around a confirmed flange interface. In stock at Universal Driveshafts for fast dispatch.