Spicer 1350WJ U-joint Kit 5-7166X (ISR) — 1350 series inside-snap-ring, non-greaseable sealed caps

Spicer 5-7166X is a factory-spec 1350WJ-series inside-snap-ring universal joint kit engineered as a non-greaseable replacement to restore driveline alignment and long service life.

Built to the same dimensions and tolerances as original equipment, the Spicer 5-7166X U-joint kit provides a direct-fit repair for 1350-series driveshafts that use inside snap rings (ISR). Its non-greaseable Life-style bearing caps deliver sealed performance for applications where routine lubrication is impractical or where a sealed unit is preferred. This kit suits mechanics and DIYers who need a dependable, dimensionally correct part for rebuilds and maintenance.

What exact dimensions and style does this U-joint use?

The 5-7166X is specified for 1350WJ applications with inside snap ring retention. Critical measurements match OE requirements so it installs without modification.

• Bearing cap diameter: 1.188 inches (30.17 mm)
• Length between snap rings: 2.406 inches (61.12 mm)
• Inside Snap Ring (ISR) retention style
• Fits 1350WJ series driveline yokes

How does the non-greaseable Life design affect maintenance?

The sealed, non-greaseable construction eliminates the need for periodic greasing, reducing maintenance steps and the chance of contamination during servicing. It’s intended for installations where access to a grease zerk is limited or when a sealed unit is preferred for longevity in harsh environments.

• Factory-sealed bearing caps prevent external contamination
• No grease fittings required or included
• Lower routine maintenance compared with serviceable joints
• Works well in sealed driveshaft assemblies

Will this kit fit my vehicle and how straightforward is installation?

If your driveshaft uses a 1350-series U-joint with inside snap rings, the Spicer 5-7166X is a direct-replacement option. Installation involves removing the old cap, pressing in the new joint, and securing the snap rings; a press or appropriate bench vise and sockets usually make the job cleaner and faster.

• Direct-fit for 1350WJ ISR applications—no machining required
• Requires snap-ring pliers, press or vise for safe installation
• Follow vehicle-specific torque and alignment procedures
• Use replacement snap rings supplied with the kit

What performance and durability benefits should I expect?

Manufactured to Spicer’s OEM-level standards, this U-joint kit provides consistent joint geometry and material strength for reliable driveline operation. The sealed bearing caps and precision fit help reduce play and vibration after installation, restoring smoother driveline performance.

• OEM specification manufacturing for dimensional accuracy
• Sealed caps reduce ingress of dirt and moisture
• Designed to resist premature wear in standard duty use
• Helps reduce driveline vibration when installed correctly

Who is this for: The Spicer 5-7166X U-joint kit is aimed at professional technicians, restoration enthusiasts, and DIY mechanics who need a sealed, OE-dimension 1350-series inside-snap-ring replacement. Choose this kit when you require a non-greaseable, factory-spec component to restore driveline fit and function on vehicles and equipment that specify the 1350WJ ISR configuration.