Spicer Rear Pinion Seal, Nut & Crush Sleeve Hardware Kit for Jeep Wrangler, Cherokee & Grand Cherokee (Dana 35)

Stop front-pinion gear oil leaks, correct dangerous play in your rear differential input yoke, and safeguard your ring and pinion gears with this genuine Spicer Rear Pinion Nut, Seal & Crush Sleeve Kit. Specifically bundled as a complete service refresh for Jeep Dana 35 solid rear axles, this hardware kit provides the essential, factory-correct components required to reseal your input yoke assembly.

On a solid rear axle, the pinion seal forms the primary fluid boundary around the high-speed spinning input yoke. Over high mileage, continuous trail vibration, or hard off-road use, the factory rubber seal hardens and dry-rots, allowing differential oil to weep out of the front pumpkin neck. If left unaddressed, gear oil will coat the underside of your vehicle, eventually starving the internal reservoir and causing catastrophic failure of the ring, pinion, and carrier bearings.

Replacing a leaking pinion seal requires removing the main pinion nut and yoke, which completely relieves tension on the internal collapsible crush sleeve. Because both the heavy-duty pinion nut and the crush sleeve are strictly single-use structural components engineered to deform once under extreme torque, they cannot be safely re-torqued or reused. Attempting to recycle old hardware makes it nearly impossible to re-establish exact pinion bearing preload—leading to rapid bearing failure, excessive drivetrain whine, or catastrophic differential lockup. Sourcing a genuine Spicer kit ensures factory-matched thread engagement, precise collapsible cylinder resistance, and a premium multi-lip Viton rubber seal capable of handling intense rotational friction and high thermal cycles.

Kit Contents (Services One Dana 35 Rear Differential Input Yoke):

• (1) Premium Heavy-Duty Outer Pinion Fluid Oil Seal (Part # 43085)

• (1) High-Tensile Collapsible Pinion Bearing Preload Crush Sleeve (Part # 42102 / 3175779)

• (1) Factory-Spec Self-Locking Pinion Nut (Part # 41307)

Kit Highlights:

• Mandatory Hardware Bundle: Combines the primary outer fluid barrier with the single-use collapsible sleeve and lock nut needed to safely execute a leak repair without throwing off your pinion bearing configuration.

• Genuine Spicer OEM Engineering: Formulated by the vehicle's original axle manufacturer to guarantee strict compliance with factory metallurgical standards and dimensional layout tolerances.

• Prevents Differential Starvation: Locks high-viscosity gear oil safely inside the center pumpkin casting, ensuring continuous lubrication for your internal gear sets.

• Premium Viton Seal Material: Features an advanced rubber elastomer blend with a factory-lubricated sealing lip to resist premature tearing, chemical breakdown, and thermal hardening.

Vehicle & Axle Fitment:

• Axle Profile: Solid Monobeam Rear Dana 35 Axles (Fits 1990 and Newer C-Clip & Non-C-Clip Configurations).

• Jeep Wrangler: 1990–1995 Wrangler YJ and 1997–2006 Wrangler TJ / LJ models equipped with standard rear Dana 35 axles.

• Jeep Cherokee: 1990–2001 Cherokee XJ compact SUVs.

• Jeep Grand Cherokee: 1993–1998 Grand Cherokee ZJ and select early WJ models running matching input yoke stations.

• Jeep Comanche: 1990–1992 MJ pickup trucks.

• Position: Rear Differential Center Section — Pinion Input Yoke Neck Station