GM 3864403 Nos Muncie Trans Lever 3/4

( Brand: Gm ), ( Manufacturer Part Number: 3864403 ), ( Type: Shifter Lever ), ( Transmission Type: Manual )

Review GM Nos Speed Muncie Trans 3-4 Shift Lever fits CORVETTE 1965–1967

Muncie M21 3-Speed Transmission for 1965, 1966, and 1967 Corvette (GM Part Number: 3864403)

The Muncie M21 3-Speed Transmission from General Motors (GM Part Number: 3864403) is a classic transmission solution for 1965, 1966, and 1967 Corvette models. This transmission is renowned for its robust design and high performance capabilities, making it a favorite among classic car enthusiasts and restorers.

The Muncie M21 transmission features a 3-speed manual configuration with a 12-bolt bell housing. It is designed to be used with small-block Chevrolet engines, making it an ideal choice for Corvette applications. The transmission's gear ratios are well-suited for both daily driving and high-performance applications, with a first gear ratio of 2.56:1, a second gear ratio of 1.56:1, and a third gear ratio of 1.00:1.

The Muncie M21 transmission is known for its durability, with a heavy-duty input and output shaft, as well as a strong, forged steel crankshaft. It also features a synchronizer design that ensures smooth, precise shifts. The transmission's bell housing is cast iron, providing additional strength and rigidity.

This transmission is a direct replacement for the original unit in 1965, 1966, and 1967 Corvette models. It comes with a new torque converter, clutch assembly, and transmission mount. The transmission is also fully rebuilt and tested to ensure optimal performance and reliability.

Installing the Muncie M21 transmission in your Corvette is a straightforward process, with clear instructions provided. The transmission includes all necessary hardware for installation, making it a complete solution for those looking to upgrade their classic Corvette's powertrain.

In summary, the Muncie M21 3-Speed Transmission (GM Part Number: 3864403) is a high-quality, reliable, and robust solution for those looking to enhance the performance of their 1965, 1966, or 1967 Corvette. With its strong design, smooth shifts, and suitability for small-block Chevrolet engines, it is an essential upgrade for any Corvette enthusiast.

Buying a GM 3864403 Muncie 3-speed/4-speed transmission for a 1965, 1966, or 1967 Corvette involves considering several factors to determine if it's a worthwhile investment. Here are some pros and cons:

1. Authenticity: An original Muncie transmission is highly valued by Corvette enthusiasts, adding to the value and desirability of the vehicle.

2. Performance: Muncie transmissions are known for their strong construction and smooth shifts, making them ideal for high-performance applications.

3. Availability: These transmissions are relatively common on the used market, and you can find rebuilt or new units from various suppliers.

1. Cost: Original Muncie transmissions, especially those in good condition, can be quite expensive. Rebuilt or used transmissions may be more affordable but still require an investment.

2. Maintenance: Muncie transmissions require regular maintenance, including synchros and clutches, to keep them in top condition.

3. Compatibility: Ensure the transmission is compatible with your specific Corvette model and engine configuration.

Buying a GM 3864403 Muncie transmission for a 1965, 1966, or 1967 Corvette can be a worthwhile investment for enthusiasts seeking authenticity and performance. However, the cost and maintenance requirements should be carefully considered before making a purchase.

If you're looking for improved performance and authenticity, a rebuilt or new GM 3864403 Muncie transmission can be an excellent addition to your 1965, 1966, or 1967 Corvette. However, ensure you purchase it from a reputable supplier, and consider the costs and maintenance requirements before making the investment. Alternatively, if budget is a concern, you may want to consider other transmission options that offer similar performance at a lower cost.

Details:

This shifter lever is designed for manual transmission vehicles and a genuine OE/OEM part manufactured by GM. The product is a NOS GM 1965-1967 Corvette 4 Speed Muncie Trans 3-4 Shift Lever, part number 3864403. #6639MATT NOS GM NEW OLD STOCK. It is a high-quality replacement part specifically made for the mentioned vehicle model's, ensuring perfect fit and optimal performance.

part #: 3864403 price

• $39.95

specifications geashif:

• for models: Corvette
• for years: 1965-1967
• brand: Gm
• mpn: 3864403
• type: Shifter Lever
• transmission type: Manual

payments geashif:

• other
• credit card: Discover
• wallet: Google-pay

general geashif:

• Car Truck Parts Accessories > Transmission Drivetrain > Shifters, Cables Linkages
• condition: New

seller geashif:

• rating: 99.9%
• city: Cincinnati, Ohio
• # reviews: 8482

returns geashif:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

offer geashif:

• started: January 31, 2026
• availability: In Stock
• quantity: 7
• sold: 0
• options: Ship-to-home

shipping geashif:

• cost: $8.10
• class: Standard
• transit: 4-9 Days
• type: Calculated
• service: USPS Ground Advantage
• carrier: USPS

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