Dana 3-4-13921-1 End Yoke
The Dana Spicer 3-4-13921-1 End Yoke is a genuine Spicer coupling-shaft or driveshaft end yoke designed for select 1480-series driveline applications. It installs over a 10-spline shaft and connects the shaft to a compatible 1480-series universal joint, providing the strength and dimensional accuracy required to transmit torque through heavy-duty truck and vocational driveline systems.
Manufactured from heavy-duty steel, the 3-4-13921-1 features a 1.500-inch spline major diameter, 2.000-inch through-bore length, and bearing-strap-style U-joint retention. It accepts a 1480-series universal joint with 1.375-inch bearing caps and a 4.188-inch span. The yoke is commonly cataloged for select Ford truck and coupling-shaft applications, but fitment should be confirmed from the driveshaft assembly number and physical dimensions.
Technical specifications
| Specification | Detail |
|---|---|
| Manufacturer | Dana Spicer |
| Part number | 3-4-13921-1 |
| Component type | Driveshaft/coupling-shaft end yoke |
| Universal-joint series | 1480 Series |
| Bore type | Splined hole |
| Spline count | 10 |
| Spline style | Straight spline; non-involute |
| Spline major diameter | 1.500 in. |
| Hub diameter | Approximately 1.810 in. |
| Length through splined hole | 2.000 in. |
| U-joint centerline to end of hub | 4.031 in. |
| Yoke style | BS—bearing strap |
| Bearing-cap diameter | 1.375 in. |
| U-joint span | 4.188 in. |
| Published operating angles | Approximately 22.5° and 30° |
| Material | Steel |
| Country of origin | United States |
| Package quantity | 1 each |
Dana’s driveline catalog identifies the 3-4-13921-1 as a 1480-series coupling-shaft yoke with a non-ground 1.810-inch hub diameter. The same catalog lists the 1480 bearing-strap configuration with a 4.188-inch outside dimension and 1.375-inch bearing diameter.
Cross-references and related numbers
- Dana Spicer 3-4-13921-1
- Condensed Dana number 34139211
- Distributor format 250-34139211
- Alternate catalog reference 23913225810
- Dana Spicer 3-4-6901-1 — earlier coupling-shaft yoke without metal slinger
- Dana Spicer 3-4-7391-1X — earlier assembly with metal slinger; commonly listed as obsolete
- Slinger reference 231004
The older 3-4-6901-1 and 3-4-7391-1X share the principal published dimensions of the 3-4-13921-1, but differences in slinger configuration and assembly content should be checked before substitution.
