GM 3911985 Nos Cluster Gear Muncie Transmission Car 707172737475 66-76

( Brand: Gm ), ( Manufacturer Part Number: 3911985 ), ( Type: Counter Shaft ), ( Oe/oem Part Number: Chevrolet Malibu Impala Caprice Belair Biscayne Chevelle Nova, Suburban Blazer Jimmy 4x4 4wd Sm330 29 23 17 16 Teeth Tooth, F/8 Pontiac Firebird Heavy Duty Tempest Trans Am T/8 Lemans ), ( Vintage Part: Yes ), ( UPC: 707172737475 )

Review GM Nos 66-76 Chevy Cluster Gear Hd Muncie Speed Transmission Pickup Truck Car

GM 3911985 Cluster Gear Set for Muncie M21/M22 Transmissions (Applies to 1966-1976 Chevy Cars)

This product, GM 3911985, is a genuine cluster gear set designed specifically for Muncie M21 and M22 transmissions. It is engineered to fit and function optimally in Chevrolet vehicles manufactured between the years 1966 and 1976. The cluster gears play a crucial role in the transmission system as they connect the input shaft to the gear train, facilitating the transfer of power from the engine to the wheels.

The GM 3911985 cluster gear set boasts high-quality materials and precise manufacturing standards. The gears are made from tough, heat-treated steel for durability and longevity. The splines are accurately machined to ensure a secure connection between the gears and the shafts. The gear teeth are precision cut to provide smooth, efficient power transfer.

The set includes all the necessary cluster gears: first, second, third, fourth, and reverse gears. Each gear is labeled for easy identification and installation. The gears are also coated with a protective layer to prevent corrosion and wear.

Installation of the GM 3911985 cluster gear set is relatively straightforward. However, it is recommended that the installation is performed by a professional mechanic or an experienced enthusiast to ensure proper alignment and engagement of the gears. Improper installation may result in transmission damage or poor performance.

In summary, the GM 3911985 cluster gear set is a high-quality replacement for worn-out or damaged gears in the Muncie M21 and M22 transmissions found in 1966-1976 Chevrolet cars. Its precise manufacturing, durable materials, and protective coating make it an excellent choice for restoring or upgrading your classic vehicle's transmission system.

Buying a GM 3911985 NOs 66-76 Chevy cluster gear for a Muncie transmission car involves considering several pros and cons to help make an informed decision.

1. Original Equipment: This cluster gear is an original equipment part, which means it is manufactured by GM and designed to fit and function optimally in your specific 66-76 Chevy Muncie transmission car.

2. Improved Performance: A worn-out or faulty cluster gear can negatively impact the performance of your transmission. Replacing it with a new one can help improve the shifting quality and overall driving experience.

3. Long-Term Savings: By investing in a new cluster gear now, you can potentially save money on costly repairs or replacements down the line.

4. OEM Quality: The OEM quality of this part guarantees that it meets GM's high standards for durability and reliability.

1. Cost: Original equipment parts can be more expensive than aftermarket alternatives. However, the long-term savings and improved performance may offset the initial investment.

2. Availability: Depending on the specific year, make, and model of your Chevy Muncie transmission car, the availability of this OEM part may be limited, making it more challenging to find and purchase.

3. Installation Complexity: Installing a new cluster gear in your transmission may require advanced mechanical skills and specialized tools, potentially resulting in additional labor costs.

The decision to buy a GM 3911985 NOs 66-76 Chevy cluster gear for your Muncie transmission car depends on your priorities and circumstances. If you value the benefits of an original equipment part, such as improved performance and long-term savings, the investment may be worthwhile. However, if cost and availability are significant concerns, you may want to explore aftermarket alternatives or consider having the existing cluster gear repaired instead. Ultimately, weighing the pros and cons and consulting with a trusted mechanic can help you make an informed decision.

If you decide to proceed with purchasing the GM 3911985 NOs 66-76 Chevy cluster gear, ensure that you buy it from a reputable dealer or supplier to guarantee authenticity and quality. Additionally, consider having the new gear installed by a certified mechanic to ensure proper installation and optimal performance.

Details:

New old stock GM counter shaft 'cluster' gear, part# 3911985 we find in Chevy car truck parts books. Getting to be a very hard find part NOS. Also for 1971 all A,B,X,F HD 3sp, Truck: 1969-76 All CK Trucks, Blazer, Jimmy with Muncie 3sp. Has some surface rust and original GM box is rough.

Pretty clean overall. Most of those guys do not even own their parts, they are relying on the parts being shipped from some third party IF have them and you know condition until it arrives at your door. Teeth are 29-23-17-16 count. Ship cost is for continental US 48 state.

part #: 3911985 price

• $100.00

specifications manutransmission:

• for makes: Chevy
• brand: Gm
• mpn: 3911985
• type: Counter Shaft
• oe/oem part number: Chevrolet Malibu Impala Caprice Belair Biscayne Chevelle Nova, Suburban Blazer Jimmy 4x4 4wd Sm330 29 23 17 16 Teeth Tooth, F/8 Pontiac Firebird Heavy Duty Tempest Trans Am T/8 Lemans
• vintage part: Yes
• upc: 707172737475

general manutransmission:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Manual Transmission Parts

returns manutransmission:

• policy: No Returns

payments manutransmission:

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

offer manutransmission:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: November 21, 2025
• quantity: 1

shipping manutransmission:

• type: Fixed
• service: Economy
• transit: 4-10 Days
• class: Economy
• cost: $15.00

seller manutransmission:

• # reviews: 3987
• city: Adel, Georgia
• rating: 100.0%

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