National 470898 Manual Transmission Output Shaft Seal Fits Chevy Ford GMC Dodge For Sale - New and Used

National 470898 Manual Transmission Output Shaft Oil Seal (2.125\" x 2.875\" x 0.375\")

Prevent transmission fluid leaks, protect drivetrain components, and keep your classic truck or car running leak-free with the National 470898 Manual Transmission Output Shaft Seal. Manufactured by National Oil Seals—a recognized leader in premium sealing solutions under Federal-Mogul Motorparts—this OE-grade multi-purpose oil seal is engineered to deliver dependable fluid sealing on transmission output shafts and transfer cases.

A failing output shaft seal allows vital gear oil or transmission fluid to weep from the rear extension housing, spraying lubricant underneath the chassis, attracting road grime, and risking catastrophic gear seizure from fluid starvation. The National 470898 features a premium spring-loaded multi-lip Nitrile (NBR) sealing element combined with an integrated garter spring to maintain tight, continuous contact against the rotating slip yoke or output shaft, even during high-load torque spikes.

Key Features

• Redicoat Bore Sealant: Features National\'s proprietary red outer sealant that fills minor imperfections in the housing bore for a positive, leak-proof press fit.

• Dual Multi-Lip Protection: Primary lip retains lubricating oil while the secondary external lip prevents road grit, dirt, and moisture from reaching internal bearings.

• Low Fluid Swell Formulation: Premium Nitrile rubber resists swelling, softening, and embrittlement in modern and conventional petroleum-based gear oils.

• Wide Operating Temperature: Reliably functions across extreme ambient and operating conditions from -40°F to 225°F (-40°C to 107°C).

Technical Specifications

• Brand: National Seals (Federal-Mogul)

• Part Number: 470898

• Shaft Diameter (ID): 2.125 in (53.98 mm)

• Housing Bore (OD): 2.875 in (73.03 mm)

• Width: 0.375 in (9.53 mm)

• Sealing Material: Nitrile (NBR)

• Design: Multi-Lip / Spring Loaded

Verified Vehicle Application Guide

(Commonly installed on manual transmissions, heavy-duty 4-speed gearboxes such as NP435, and classic truck drivelines)

• Chevrolet Trucks & Cars: 1957–1972 C10, C20, C30, K10, K20, Suburban, and classic passenger car manual transmissions

• GMC Trucks & Commercial: 1959–1972 1000, 1500, 2500, 3500 pickups and Jimmy models

• Ford Trucks & Vans: 1960–1971 F-100, F-250, F-350, Econoline, and classic models

• Dodge & Fargo Trucks: 1963–1968 D100, D200, D300, W100, W200, Fargo pickups

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