Brand: 
4-4-7901-2 End Yoke, 1550 Series – Splines; 10×1.5 – UDS
$75.64
25 in stock
Description
The 4-4-7901-2U is a 1550 series end yoke with 10 splines at 1.500 diameter, designed for transmission or transfer case output shaft applications. Ready to install — in stock at Universal Driveshafts.
Full Description
4-4-7901-2U: 1550 Series End Yoke -- Drivetrain Component Guide
The drivetrain has no redundant load paths -- every torque-carrying component must perform correctly or the system fails. The 4-4-7901-2U is the end yoke position in that load chain for 1550 series applications, providing spline diameter of 1.500 with 10 splines with forged construction and production-controlled tolerances.
Specification Data
| Specification | Value |
|---|---|
| Series | 1550 |
| Splines Count | 10 |
| Splines Dia | 1.500 |
| Hub Dia | 1.940" |
| CJ to End | 3.818 |
| Through Hole | 2.000 |
| Style | BS |
| Material | Steel |
| Brand | UDS |
| Part Number | 4-4-7901-2U |
Failure Modes and Prevention
A worn end yoke typically presents as vibration at certain speed ranges, a clunk on throttle engagement, or visible play when you grab the driveshaft near the yoke and rock it. Left unaddressed, it accelerates u-joint wear, can score the output shaft seal contact area, and in severe cases causes shaft separation. Replacing the 4-4-7901-2U as part of a scheduled drivetrain refresh -- rather than waiting for failure -- is the lower-cost strategy in the long run.
Fitment Checklist
- Spline diameter of 1.500 with 10 splines -- verified against this part before ordering
- Series 1550 u-joint cross in service or on order for this shaft end
- Mating component (output shaft / companion flange) in serviceable condition
- Retaining hardware (snap rings, strap bolts, or flange bolts as applicable) renewed if previously heat-cycled
- Shaft balance acceptable after installation -- road test confirms this
Note: Use 4-53-361 For midship Splines
Order the 4-4-7901-2U from Universal Driveshafts today. In-stock items ship fast from our warehouse.
New to end yokes? Our end yoke guide explains splines, snap-ring styles, and how to measure.
Additional information
| Series | 1550 |
|---|---|
| Hub dia | 1.940″ |
| Splines count | 10 |
| Through hole | 2.000 |
| Style | BS |
| Partn number | 4-4-7901-2 |
| Brand | UDS |
| Notes | Use 4-53-361 For midship Splines |
| Cj to end | 3.818 |
| Splines dia | 1.500 |
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 | Bore type splined Cj to end 2.50 Hub dia 1.62 Keyway N/A Series 1000 Through hole 1.20 Bore dia 1.125 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 2.50 Hub dia 2.25 Partn number 10-4-143 Bore dia 1.125 Bore type round Keyway GAP - 0.25 Brand UDS Splines count N/A Style ISR Series 1000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Bore type round Cj to end 2.50 Hub dia 1.62 Keyway GAP - 0.25 Series 1000 Through hole 1.20 Bore dia 938 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 2.900" Hub dia 1.342 Notes USED ON 2 PCS SHAFT FOR SUBARU TO REPLACE THE CENTER CV SECTION Partn number 1204-241U Series 1251 Splines count 22/24 Splines dia 995 Style SR Through hole 1.300" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 3.312 Hub dia 1.445 Notes USED ON 2 PCS SHAFT FOR SUBARU TO REPLACE THE CENTER CVJ SECTION Partn number 1204-261U Series 1251 Splines count 24/26 Splines dia 1.115 Style SR Through hole 1.300" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 6.200" Hub dia 3.819 Partn number 131446KS Series SPL250 Splines count 49 Splines dia 2.544 Style BS Through hole 2.672 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 2.750" Hub dia 1.420" Notes FITS STUB: 1453-232 OR 3053-233 Partn number 1404-22 Series 1100 Splines count 22/23 Splines dia 0.990" Style SR Through hole 1.360" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 3.250" Hub dia 1.420" Notes FITS STUB: 1453-232 OR 3053-233 Partn number 1404-231 Series 1100 Splines count 22/23 Splines dia 0.990" Style SR Through hole 1.800" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 3.265 Hub dia 1.416 Notes USED ON MERKUR SHAFTS Partn number 1404-261 Series 1100 Splines count 26 Splines dia 1.129 Style SR Through hole 1.824 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| | Cj to end 5.590" Hub dia 2.879 Notes COUPLING SHAFT YOKE Partn number 170-4-1271-1 Series SPL170 Splines count 46 Splines dia 2.390" Style BS Through hole 2.750" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
