3104-252 – End Yoke – 25 Splines – 1.0978″ Splines Dia – 1.812″ Hub Dia

Here's what a shop tech would tell you: the first thing you check on a vibrating driveshaft is the yokes -- not the U-joint, not the balance, not the slip yoke. Worn yokes are behind more driveline complaints than anything else, and they're easy to overlook. The 3104-252 is a UDS 1310F Series end yoke with a 1.0978" spline bore, designed for FORD 8 - U BOLT TYPE. If your shaft is making noise and the U-joint passed your inspection, pull this part number up and check the fit.

What to Check Before You Pull the Yoke

Before ordering a replacement, verify three things on the output shaft:

1. Spline diameter: Measure the shaft OD at the splines. Should be 1.0978" for this part.
2. Spline count: Count the splines. Should be 25.
3. Snap ring groove: Is it on the inside face (OSR style) or outside? This part uses UB style.

If all three match, you have your part. If not, you need a different SKU -- don't force a close-enough fit.

Part Specifications

Full dimensional data for the 3104-252. These are the numbers your parts lookup should have matched if your catalog is current.

Install Notes

Clean shaft splines, fresh snap ring, assembly lube on the splines. Torque the retaining nut -- don't guess. The hub diameter on this yoke is 1.812"; it needs to run true with the seal bore or you'll have an oil leak within a few thousand miles. Through hole is 2.625", which clears standard internal shafts and cables in 1310F Series applications. Center-to-end is 4.375" -- if you're changing yoke models, re-check your driveshaft operating length before you button everything up.

Final step: take it for a drive above 55 mph and listen. If vibration returns, the driveshaft needs rebalancing with the new yoke installed.

Part 3104-252 is a UDS product. Universal Driveshafts stocks a complete range of 1310F Series end yokes, U-joints, and driveshaft components. Contact our technical team for fitment assistance.