Spicer U-Joint Kit 5-648X for 1330/1350 Series — OSR Greaseable 3.625" Span, Mixed Caps

Spicer 5-648X is a greaseable, outside-snap-ring universal joint kit engineered as an OE-spec replacement for 1330/1350 driveline applications. Spicer designed this 5-648X U-joint kit to match the exact dimensions and performance of original equipment, delivering reliable drivetrain compatibility across a wide range of vehicles. The kit follows the 1330/1350 Series sizing and uses outside snap rings (OSR) for secure installation while allowing routine lubrication through grease fittings. With mixed bearing cap diameters and a 3.625-inch outside-to-outside span, it fits applications that require staggered cup sizes and robust load-handling.

What are the exact dimensions and fitment details?

The 5-648X kit uses two different bearing cup diameters to match many OE driveshaft yokes. These measured dimensions allow a precise fit and maintain driveline alignment when replacing worn U-joints.

• Bearing cap diameter (small): 1.062 inches
• Bearing cap diameter (large): 1.188 inches
• Outside-to-outside dimension: 3.625 inches
• Series compatibility: 1330/1350

How does the greaseable design help maintenance?

The greaseable cross and caps let you re-lubricate the joint without disassembly, extending service life when maintained at recommended intervals. Regular greasing reduces wear, prevents corrosion, and maintains smoother rotational operation compared with sealed, non-greasable options.

• Zerk fitting for easy grease points
• Greaseable cross reduces fretting and corrosion
• Simple shop or field servicing with common grease gun

Is this an OEM-equivalent replacement and what makes it genuine Spicer?

This kit is manufactured to Spicer’s OE specifications, matching original materials, tolerances, and snap-ring retention style. That ensures compatibility with factory-provided yokes and predictable driveline geometry after installation.

• Built to Spicer OE standards for fit and finish
• Outside snap ring retention consistent with many factory joints
• Part references: 2-3050, 448 for cross-checking applications

How do I install it and what should I check during replacement?

Installation follows standard U-joint replacement procedures: remove the driveshaft, press out the old caps, and press in the new caps while keeping the cross aligned. After installation, verify snap rings are fully seated and check for correct bearing cap seating and free rotation before reassembly.

• Press-fit caps using a bench press or proper driver set
• Confirm outside snap rings are fully engaged in grooves
• Check for smooth, non-binding rotation with no play

Who is this for? The Spicer 5-648X U-joint kit is suited to mechanics, fleet maintenance teams, and DIY enthusiasts replacing worn universal joints in 1330/1350-series drivelines that use outside snap rings. Choose this kit when you need an OE-dimension, greaseable replacement that restores driveline serviceability and aligns with factory tolerances. Regular inspection and greasing will maximize service life, and the mixed-cap sizing accommodates yokes with staggered cup dimensions.

FAQ

Q: Will this fit my 1330 series driveshaft?

A: If your driveshaft uses 1330/1350 series dimensions with outside snap rings and 3.625" outside-to-outside spacing, this Spicer 5-648X kit is compatible.

Q: Can I grease this U-joint after installation?

A: Yes — the kit is greaseable via a zerk fitting, allowing routine lubrication without disassembly.