1955–1956 Chevrolet 150, 210, Bel Air & Corvette C1 NOS Rear Axle Bearing Seal Kit #3717671 (for RW507)

Available for sale is a genuine General Motors New Old Stock (NOS) Rear Axle Bearing Seal Kit, GM part number 3717671, designed for 1955–1956 Chevrolet 150, 210, Bel Air, and Corvette C1 applications equipped with RW507 rear axle bearing setups. This original GM service replacement kit is a rare and highly desirable component for restorers seeking factory-correct rear axle sealing hardware for classic Chevrolet drivetrains.

The 1955–1956 Chevrolet passenger cars and early Corvette C1 models mark the beginning of the legendary “Tri-Five” era, a period that introduced modern Chevrolet design, improved chassis engineering, and the revolutionary small-block V8 engine. These vehicles remain among the most collectible and historically significant American classics.

The rear axle bearing seal kit is an essential component of the axle assembly. It helps prevent gear oil and differential lubricant from leaking into the wheel bearing area while also protecting the bearing from contamination. Proper sealing ensures correct lubrication control, reduces bearing wear, and maintains long-term rear axle reliability.

Over time, original axle seals deteriorate due to heat, age, oil exposure, and environmental conditions. Common issues include oil leaks at the rear wheels, contaminated bearings, and premature bearing failure. Replacing seals during axle service is critical for proper restoration and long-term drivetrain performance.

This component is a true New Old Stock (NOS) GM service replacement kit, meaning it was manufactured during the original production era and has never been installed. It retains original factory specifications, materials, and engineering standards intended for proper fitment and sealing performance.

Unlike many modern reproduction kits, NOS GM seal components are valued for their authentic construction and period-correct material quality, making them ideal for concours restorations and factory-accurate rebuilds.

For restorers and collectors, maintaining proper axle sealing is essential for preserving drivetrain integrity, preventing leaks, and ensuring smooth rear axle operation. Whether restoring a Tri-Five Chevrolet or an early Corvette, this kit helps maintain originality and reliability.

As original GM rear axle service seal kits become increasingly difficult to source, NOS components such as this remain highly sought after by collectors and restoration professionals.

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Product Features

• Genuine General Motors New Old Stock (NOS) kit
• GM Part Number: 3717671
• Rear Axle Bearing Seal Kit
• Designed for RW507 rear axle bearing applications
• Fits 1955–1956 Chevrolet passenger cars and Corvette C1
• Helps prevent axle oil leaks and contamination
• Supports proper rear axle bearing lubrication
• Factory-correct GM service replacement component
• Original period-correct materials and design
• Never installed
• Rare Tri-Five and Corvette drivetrain sealing kit

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Vehicle Compatibility

Fits:

• 1955 Chevrolet 150
• 1955 Chevrolet 210
• 1955 Chevrolet Bel Air
• 1955 Chevrolet Corvette C1
• 1956 Chevrolet 150
• 1956 Chevrolet 210
• 1956 Chevrolet Bel Air
• 1956 Chevrolet Corvette C1

Compatibility may vary depending on rear axle configuration and production specifications. Buyers should verify fitment before purchase.

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Condition

This item is offered in New Old Stock (NOS) condition. It has never been installed and remains an original GM service replacement kit. Due to decades of storage, minor shelf wear, preservative residue, packaging wear, or light aging of sealing materials may be present.

Please review all available photographs carefully to determine exact condition before purchase.

For collectors and restoration enthusiasts seeking authentic GM drivetrain sealing components, this 1955–1956 Chevrolet 150, 210, Bel Air & Corvette C1 NOS Rear Axle Bearing Seal Kit #3717671 (RW507) represents an excellent opportunity to restore proper axle sealing performance while preserving factory-correct originality and long-term vehicle value.