Spicer Rear Differential Pinion Seal, Nut & Crush Sleeve Kit for Jeep (Dana 35 Axles)

Stop annoying differential fluid leaks, preserve critical gear bearing preload, and safeguard your rear drivetrain with this genuine Spicer Rear Pinion Seal, Nut & Crush Sleeve Kit. Specifically bundled as a complete maintenance and installation solution for the iconic Dana 35 solid rear axle, this kit supplies all the single-use components necessary to refresh a leaking pinion neck or button up a new gear ratio setup.

On solid-axle Jeep platforms, the pinion seal forms the primary fluid barrier around the spinning companion flange yoke at the front of the differential housing. Over high mileage, intensive off-road trail use, or long-term storage, the rubber sealing lip naturally hardens, cracks, or scores, allowing gear oil to weep out and fling underneath the chassis. If a pinion seal leak is ignored, the fluid drop will starve the carrier and pinion bearings, resulting in severe gear whining or catastrophic differential failure. Additionally, the internal crush sleeve and pinion nut are strictly single-use parts; once the pinion nut is backed off to change a seal or yoke, these components must be replaced to correctly re-establish the precise bearing preload.

This original equipment manufacturer (OEM) master service kit provides a factory-correct refresh package. Sourcing genuine Spicer components guarantees exact original dimensional specs, factory-spec steel compression rates on the collapsible spacer, and a high-strength prevailing-torque nut required to hold the yoke assembly firmly in place under intense drivetrain torque.

Kit Contents:

• (1) Premium Rear Pinion Fluid Oil Seal

• (1) High-Strength Collapsible Pinion Bearing Spacer (Crush Sleeve)

• (1) Precision-Threaded Prevailing Torque Pinion Nut

Kit Highlights:

• Complete Pinion Overhaul Bundle: Packs all three mandatory single-use items required to complete a pinion seal replacement or ring and pinion installation.

• Genuine Spicer OEM Engineering: Manufactured by the original equipment supplier to ensure perfect structural dimensions and accurate metal compression properties.

• Prevents Bearing Failure: Allows technicians to re-establish the exact inch-pound rotational preload on the pinion bearings, eliminating harmful shaft play and vibration.

• Premium Environmental Defense: Features a premium multi-lip rubber seal design with integrated dirt exclusion technology to block highway water, mud, and trail grit.

Vehicle & Axle Fitment:

• Axle Profiles: Solid Rear Monobeam Dana 35 (Standard and Custom C-Clip or Non-C-Clip Configurations).

• Jeep Wrangler: 1987–1995 Wrangler YJ and 1997–2006 Wrangler TJ / LJ models.

• Jeep Cherokee: 1984–2001 Cherokee XJ compact SUVs.

• Jeep Comanche: 1986–1992 MJ pickup trucks.

• Jeep Grand Cherokee: 1993–1998 Grand Cherokee ZJ models.

• Position: Rear Axle Housing — Input Pinion Shaft Location