GM 3987936 Trans Driver Gear Seal Nos B18-31

( Brand: Gm ), ( Manufacturer Part Number: 3987936 ), ( Part Type: Seal Tran Driver Gear ), ( Vintage Part: No ), ( Country Of Origin: United States )

Review GM Chevy Trans Main Driver Gear Seal Oem Nos #3987936 fits CORVETTE 1966–1970

1966-1967 GM 70 Chevy Corvette Transmission Driver Gear Seal Kit (B18-31)

This product is an authentic GM (General Motors) transmission driver gear seal kit specifically designed for 1966 and 1967 Chevrolet Corvettes. The kit, part number B18-31, includes all necessary seals needed to maintain the transmission's integrity and prevent unwanted fluid leaks.

The driver gear seal is a critical component of the Corvette's transmission system, responsible for preventing oil from escaping between the transmission housing and the input shaft. Over time, these seals can deteriorate or become damaged, leading to transmission fluid leaks.

This replacement kit from GM includes new driver gear seals made from high-quality materials designed to provide superior sealing performance and longevity. The seals feature an O-ring design for a tight, leak-free fit and are backed by the trust and reliability of General Motors.

Installing the new driver gear seals is a straightforward process, making this a popular choice for DIY enthusiasts and professional mechanics alike. The kit includes detailed instructions to guide you through the replacement process.

By using genuine GM parts, you can ensure a perfect fit and consistent performance, maintaining the overall health and longevity of your classic 1966 or 1967 Chevrolet Corvette's transmission system. Don't let a leaking transmission ruin your driving experience trust the experts at GM to provide you with the superior-quality parts you need to keep your beloved Corvette on the road.

Buying GM 3987936 1966-1970 Chevy Corvette Transmission Driver Gear Seal (B18-31): A Comprehensive Analysis

The GM 3987936 1966-1970 Chevy Corvette Transmission Driver Gear Seal (B18-31) is an essential part for those restoring or repairing their classic Corvettes. Here's a balanced analysis of the potential advantages and disadvantages of purchasing this item.

1. OEM (Original Equipment Manufacturer) Part: This seal is specifically designed and manufactured by GM, ensuring a perfect fit and function for your 1966-1970 Corvette.

2. High-Quality Material: The material used for this seal is specifically engineered to withstand the rigors of Corvette transmission use, providing reliable sealing and longevity.

3. Easy Installation: The seal is designed for easy installation, allowing you to complete the repair or restoration project in a relatively short amount of time.

4. Prevents Transmission Leaks: A damaged or worn driver gear seal can cause significant transmission leaks, leading to costly repairs and performance issues. Replacing the seal with a new one can prevent these problems and save you money in the long run.

1. Cost: OEM parts, especially for classic cars, can be more expensive compared to aftermarket alternatives. However, the quality and reliability offered by OEM parts may justify the cost for some buyers.

2. Availability: Depending on the supplier, availability of the GM 3987936 1966-1970 Chevy Corvette Transmission Driver Gear Seal (B18-31) may be limited, making it important to plan ahead and order well in advance.

3. Shipping Time: Due to the specific nature of the item, shipping times may be longer than for more commonly available parts.

The GM 3987936 1966-1970 Chevy Corvette Transmission Driver Gear Seal (B18-31) is an essential component for those looking to restore or maintain their classic Corvettes. While the cost and availability may be concerns for some buyers, the benefits of using an OEM part with high-quality materials and reliable sealing capabilities make it a worthwhile investment.

If you are serious about restoring or maintaining your classic 1966-1970 Chevy Corvette, investing in the GM 3987936 1966-1970 Chevy Corvette Transmission Driver Gear Seal (B18-31) is a wise decision. While the price may be higher than aftermarket alternatives, the peace of mind and performance benefits that come with using an OEM part make it a worthwhile investment. Make sure to order from a reputable supplier and plan ahead for any potential shipping delays.

Details:

1966 - 70 Chevy Corvette Trans Main Driver Gear Seal OEM NOS #3987936 B18-31. Part #: 3987936.

part #: 3987936 prices

• $7.50-$71.81

specifications complmanu:

• for models: Corvette
• for makes: Chevy
• for years: 1966-1970
• brand: Gm
• mpn: 3987936
• part type: Seal Tran Driver Gear
• vintage part: No
• country of origin: United States

payments complmanu:

• wallet: Paypal
• other
• credit card: Visa

offer complmanu:

• quantity: 1
• availability: In Stock
• sold: 0
• best offers: True
• options: Ship-to-home
• started: June 8, 2026

shipping complmanu:

• cost: $4.00
• type: Fixed
• service: USPS Ground Advantage
• class: Standard
• transit: 5-9 Days
• carrier: USPS

general complmanu:

• condition: New other see details
• Car Truck Parts Accessories > Transmission Drivetrain > Manual Transmission

returns complmanu:

• policy: No Returns

seller complmanu:

• city: Ballston Spa, New York
• rating: 99.5%
• # reviews: 2309

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