1950–1952 Chevrolet Styleline & Fleetline NOS Powerglide Front Oil Pump Seal #3689758

Available for sale is a genuine General Motors New Old Stock (NOS) Powerglide Front Oil Pump Seal, GM part number 3689758, designed for 1950–1952 Chevrolet passenger car applications equipped with the Powerglide automatic transmission, including Styleline and Fleetline models. This is an original GM service replacement component, highly sought after for early Chevrolet Powerglide transmission restorations.

The early 1950s Chevrolet Styleline and Fleetline models represent an important milestone in Chevrolet history, marking the introduction and early development of the Powerglide automatic transmission system. These vehicles offered drivers a smoother and more modern driving experience compared to traditional manual transmissions, making them a major advancement in postwar automotive technology.

The front oil pump seal is a critical internal transmission component that helps maintain proper hydraulic pressure and prevents transmission fluid leakage at the pump interface. In a Powerglide transmission, maintaining correct sealing is essential for smooth shifting performance, proper lubrication, and overall transmission reliability.

Over time, original transmission seals can deteriorate due to heat cycles, age, hardening of rubber materials, and exposure to transmission fluid. A worn or damaged seal can result in fluid leaks, low hydraulic pressure, slipping, or poor transmission performance. Replacing these seals is essential during any proper Powerglide rebuild or restoration.

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

Unlike many modern reproduction seals, NOS GM components provide authentic material composition and factory-correct dimensions, making them ideal for restorers who want to maintain originality and correct operation in vintage drivetrains.

For restoration specialists, maintaining accurate Powerglide transmission components is essential for both authenticity and reliable performance. Whether restoring a Bel Air, 210, 150, Styleline, or Fleetline model, using correct GM parts ensures factory-correct rebuilding standards.

As original Powerglide transmission components become increasingly difficult to locate, NOS seals like this have become highly valued among collectors, transmission rebuilders, and classic Chevrolet enthusiasts.

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Product Features

• Genuine General Motors New Old Stock (NOS) part
• GM Part Number: 3689758
• Powerglide Front Oil Pump Seal
• Designed for 1950–1952 Chevrolet passenger cars
• Fits Styleline & Fleetline models with Powerglide transmission
• Supports proper hydraulic sealing and pressure retention
• Factory-correct transmission component
• Original GM service replacement part
• Never installed on a vehicle
• Ideal for restoration and transmission rebuilds
• Rare early Powerglide internal seal

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Vehicle Compatibility

Fits:

• 1950 Chevrolet Styleline / Fleetline (Powerglide equipped)
• 1951 Chevrolet Styleline / Fleetline (Powerglide equipped)
• 1952 Chevrolet Styleline / Fleetline (Powerglide equipped)

Compatibility may vary depending on transmission configuration and rebuild specifications. Buyers should verify fitment before purchase.

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Condition

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

For collectors and restoration enthusiasts seeking authentic Powerglide transmission components, this 1950–1952 Chevrolet Styleline & Fleetline NOS Powerglide Front Oil Pump Seal #3689758 represents an excellent opportunity to restore factory-correct transmission performance and maintain originality in your classic Chevrolet restoration project.