Spicer 1350 Series U-Joint Kit 5-178X (OSR) — 1.188in Caps, 3.625in Span, Greaseable

This Spicer U-joint kit provides a direct-fit replacement for 1350-series driveshaft applications where outside snap-ring retention is required. Manufactured to the same dimensional and performance specifications as factory components, the 5-178X kit includes greaseable caps and snap rings for routine maintenance and long service life. The bearing cap diameter and cup-to-cup dimensions align with OE standards, so installation requires no modification to the driveshaft or yoke when replacing a compatible joint.

How does this U-joint match original equipment parts?

The 5-178X is engineered to the same tolerances and measurements used by vehicle manufacturers for 1350-series joints. That means splines, cap diameters, and snap-ring placement mirror OE geometry for straightforward replacement. Materials and assembly methods follow Spicer’s quality controls to deliver predictable fitment.

• Series: 1350 — compatible with 1350-series yokes
• Bearing cap diameter: 1.188 inches for correct seating
• Outside-to-outside dimension: 3.625 inches (bearing cap to bearing cap)
• OSR configuration: outside snap-ring retention for OE-style yokes

What maintenance and service features does it include?

This kit is greaseable, allowing periodic lubrication to reduce wear and help preserve bearing life under load. It comes with removable outside snap rings so the joint can be serviced or replaced without special press work in many installations. Following recommended greasing intervals will keep the cross and bearings running smoothly.

• Greaseable design: zerk fitting on bearing caps for routine lubrication
• Outside snap rings: removable for disassembly and service
• Included compatibility codes: 2-0053, CP178X, 331 for reference

Will this kit fit my driveshaft and how do I confirm compatibility?

Confirm fit by matching the series (1350), bearing cap diameter (1.188 in), and cap-to-cap span (3.625 in) to your existing joint. Also verify that your yoke uses outside snap-ring (OSR) style retention. If those dimensions and retention style match, the Spicer 5-178X is intended as a direct replacement.

• Measure bearing cap diameter: 1.188 inches expected
• Measure bearing cap to bearing cap: 3.625 inches
• Check retention type: outside snap-ring (OSR) yoke required
• Reference cross-codes: 2-0053, CP178X, 331 for cross-checking catalogs

What should I expect during installation and service life?

Installation mirrors standard U-joint replacement procedures: remove the old joint, press or drift out bearing caps as needed, install the new caps and secure the outside snap rings. Because the 5-178X is a greaseable OE-style joint, plan to add grease after installation and at regular intervals based on operating conditions to help extend service life.

• Typical installation: press or drift bearing caps into yoke, install OSR snap rings
• First service: add grease after installation to purge air and seat bearings
• Routine: grease periodically based on duty cycle and environment

Who this is for: The Spicer 5-178X U-joint kit is for professional mechanics, home DIYers, and fleet technicians replacing 1350-series universal joints that use outside snap-ring retention. It suits vehicles and equipment that require a greaseable, OE-dimension 1350 joint—especially where proven fit, maintenance access, and catalog cross-reference are important. Use the listed dimensions and cross-codes to confirm fitment before purchase, and follow vehicle-specific service procedures when installing and greasing the joint.