3104-301 – End Yoke – 1.328″ Splines dia – 1.739″ Hub Dia – 30 Spline

Replacing an end yoke is a straightforward job when you have the right part. The 3104-301 -- a UDS 1310 Series end yoke -- is dimensioned to drop onto the output shaft splines without modification, provided your shaft matches the 1.328" spline diameter and 30-spline count. This guide covers what to check before you order and what to do during installation.

Pre-Order Verification

Before removing your old yoke, record the following from either the old part or the output shaft:

• Spline diameter: Should match 1.328" for this part
• Spline count: Should match 30
• Snap ring style: UB -- check whether the groove is on the inside or outside of the bearing bore
• Series: 1310 Series -- look for the series stamp on the U-joint caps or the original yoke

Application note: GM8.5 VETTE

Dimensional Specifications

The 3104-301 carries the following dimensions, which define its fit envelope. Verify each against your application before ordering.

Installation Steps

Once you have confirmed fitment, installation proceeds as follows:

1. Remove the old yoke by unthreading the retaining nut and sliding the yoke off the output shaft splines. Mark the driveshaft-to-yoke orientation before disassembly to maintain balance phasing.
2. Clean the output shaft splines with a wire brush and solvent. Inspect for cracks or worn spline flanks.
3. Apply a thin coat of assembly lubricant to the shaft splines. Do not over-lubricate -- excess grease can cause seal contamination.
4. Slide the 3104-301 onto the splines, aligning your reference marks. The hub diameter of 1.739" should register smoothly against the seal bore.
5. Install a new snap ring (UB style) in the groove. Confirm it seats fully around the perimeter.
6. Torque the retaining nut to the vehicle manufacturer's specification.

After installation, lower the vehicle and drive briefly before inspecting for leaks or vibration. Any vibration at highway speed indicates a balance issue -- have the driveshaft rebalanced with the new yoke installed.

Part 3104-301 is a UDS product. Universal Driveshafts stocks a complete range of 1310 Series end yokes, U-joints, and driveshaft components. Contact our technical team for fitment assistance.