Spicer U-Joint Kit S44 (5-3147X) ISR — greaseable 1.125" caps, 2.556" inside-to-inside

The Spicer 5-3147X is a greaseable S44-series universal joint kit with inside snap ring (ISR) design built as a direct OE-style replacement for drivetrain service and repairs.

Engineered to the same specifications used by original equipment manufacturers, this Spicer U-joint kit restores driveline articulation and durability on compatible shafts. It includes precision-bearing cups sized to fit applications requiring a 1.125-inch bearing cap diameter and a 2.556-inch inside-to-inside dimension, and its greaseable construction helps extend service life under heavy use.

What dimensions and fitment details should I verify before buying?

Confirming the bearing cup diameter and the distance between snap rings ensures correct fitment. The 5-3147X is an S44-series ISR joint sized for a 1.125-inch bearing cap with a 2.556-inch inside-to-inside length.

• Bearing cap diameter: 1.125 inches
• Inside-to-inside length (between snap rings): 2.556 inches
• Fits inside snap ring style (ISR) yokes
• Cross-references: 2-3011, CP3147X, RL3000

How does the greaseable design benefit maintenance and longevity?

A greaseable U-joint allows periodic lubrication to replenish grease around the bearings and seals, reducing wear and helping prevent premature failure. Regular greasing is especially helpful in high-load or off-road conditions where contaminants and heat accelerate wear.

• Fitting has a zerk/greaseable fitting for routine lubrication
• Greasing lowers internal friction and supports longer service intervals
• Designed to be serviced rather than replaced immediately on wear

Which vehicles and driveline setups commonly use this Spicer S44-series part?

Applications include light- and medium-duty driveshafts that specify S44 or equivalent U-joints with ISR retention. This kit is used as a direct OE-style replacement where the OEM calls for a 1.125-inch cup and 2.556-inch snap ring spacing.

• Suitable for driveshafts requiring S44-series geometry
• Used in many truck and utility vehicle rear or intermediate shafts
• Cross-reference numbers help match older or alternative OEM part listings

What’s included in the kit and how easy is installation?

The kit contains the greaseable cross and bearing caps sized to the S44 specification with inside snap rings for retention. Installation requires basic U-joint tools and press or a bench vise; professional installation is recommended if you lack experience to ensure correct seating and snap ring engagement.

• Greaseable universal joint cross with bearing cups
• Inside snap rings included for ISR retention
• Designed as a genuine Spicer OE replacement for reliability

Who is this for? The Spicer 5-3147X suits mechanics, fleet maintenance personnel, and DIY enthusiasts replacing worn or damaged U-joints on vehicles that call for S44-series ISR parts. If you need an OE-grade, greaseable joint with precise dimensions (1.125" bearing cup, 2.556" inside-to-inside) and prefer a serviceable design, this Spicer kit is a practical choice to restore driveline function and durability.