Part No. 4-3-1241KX Slip Yoke 1550 Series, Splines: 1.750x16, Centerline To End: 6.875
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Specifications 4-3-1241KX · 1550 Series Slip Yoke
- Part number
- 4-3-1241KX
- Part type
- Slip Yoke
- Condition
- New
- Brand
- UDS
- Series
- 1550
- Splines count
- 16
- Center u-joint to end
- 6.875
- Splines diameter
- 1.750"
- Weight
- 7.25 lb
Fitment
Heavy Duty
1550 series parts use 1.375" u-joint bearing caps on a 4.875" snap-ring-to-snap-ring width (nominal). Confirm the cap diameter on the mating yoke or joint before ordering.
Interchange / cross-reference
- N4-3-1241KX
- P4-3-1241KX
4-3-1241KX replaces or interchanges with N4-3-1241KX, P4-3-1241KX. Cross-reference numbers are supplied for identification; compare the series, spline and bolt-pattern dimensions above before substituting.
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Alternative parts for 4-3-1241KX
Same fitment, another number or brand. Check the notes before you substitute.
| Add | Pic | Part # | Price | Series | Center U-Joint to End | Splines Count | Splines Dia | Notes |
|---|---|---|---|---|---|---|---|---|
 |
S4-3-1241KX |
$213.09
|
1550 | 6.875 | 16 | 1.750" | Spicer |
About 4-3-1241KX
The 4-3-1241KX slip yoke is engineered for precise axial travel within the driveshaft assembly while maintaining the rotational torque path between transmission output and driveshaft. Rated for the 1550 series, it features 16 splines at 1.750"" diameter with a center U-joint-to-end dimension of 6.875".
Function of the Slip Yoke
Slip yokes serve a critical suspension articulation function: as the drivetrain moves through suspension travel, the driveshaft must lengthen and shorten slightly. The splined bore of the slip yoke slides on the transmission tail shaft or transfer case output shaft, accommodating this length change without binding. Worn slip yoke splines cause driveline backlash, vibration, and eventually transmission seal damage. The 4-3-1241KX replaces worn units with fresh, precise splines.
Specifications
| Parameter | Value |
|---|---|
| Part Number | 4-3-1241KX |
| Series | 1550 |
| Spline Count | 16 |
| Spline Diameter | 1.750"" |
| Center U-Joint to End | 6.875" |
| Application Notes | Heavy Duty |
Spline Fit and Seal Interaction
The 16-spline, 1.750"" bore must match the transmission output shaft spline profile exactly. A loose fit causes clunking under load reversal; an oversized bore will not engage the shaft at all. The slip yoke also rides against the transmission extension housing seal -- a yoke with worn or scored sliding surfaces will damage the seal and allow fluid loss. The 4-3-1241KX presents a clean, ground surface finish on the sliding area to protect the seal.
Installation Checklist
- Drain or contain transmission fluid before removing the yoke to prevent spillage
- Inspect extension housing seal; replace if it shows cracking or hardening
- Lightly oil splines before installing new yoke onto output shaft
- Confirm U-joint bore alignment with driveshaft front yoke before assembly
- Check for smooth axial movement through full suspension travel range
- Verify no transmission fluid leaks after a test drive
Availability
Universal Driveshafts stocks the complete 1550 series slip yoke family. The 4-3-1241KX ships same-day. For specialty applications or non-standard spline profiles, our engineering team can advise on custom yoke options.
Not sure which slip yoke you need? Our transmission slip yoke guide covers spline counts, styles, and how to measure.
Related Slip Yoke in the 1550 series
See the full table
S4-3-1241KX
Slip Yoke, 1550 Series, 1.750" Splines Dia, Center U Joint To End 6.87...
$213.09In stock
5503-241
Slip Yoke, 1.562" Splines Dia, 23/24 Splines, Center U Joint To End 8....
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4-3-1431KX
Slip Yoke 1550 Series, Splines: 1.750x16, Centerline To End: 10.062
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10-3-18KX
Slip Yoke 1000 Series 1.250 X 16 splines 5.500 Centerline to End
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Slip Yoke, 1100 Series, 1.063" Splines Dia, Center U Joint To End 4.31...
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3003-16
Slip Yoke 1300 Series, Splines diameter: 1.375, Splines Count: 16
$97.08In stock
4-3-1241KX questions
What series is 4-3-1241KX?
4-3-1241KX is a 1550 series slip yoke. Nominal 1550 dimensions are 1.375" bearing caps on a 4.875" snap-ring-to-snap-ring width. Measure the cap diameter on your old joint to confirm the series before ordering.
What spline count does 4-3-1241KX have?
4-3-1241KX has 16 splines on a 1.750" spline diameter. Count the splines on the output shaft and measure across the major diameter to confirm.
What part numbers does 4-3-1241KX replace?
4-3-1241KX cross-references to N4-3-1241KX, P4-3-1241KX. Interchange data is for reference; compare the dimensions before substituting.
Is 4-3-1241KX in stock?
Yes. 16 are in stock in Florida. Most stock orders placed before 2 pm EST on a weekday ship the same day.