MUNCIE 3911968 Transmission Synchro G.m. M330 H.d REVERST-1ST

( Brand: Muncie ), ( Manufacturer Part Number: 3911968 ), ( Type: Synchro Assembly W 1 Used Ring ), ( Oe/oem Part Number: Awt306-80 Borg-warner ), ( Items Included: N/a. ), ( Material: Steel ), ( Vintage Part: Yes ), ( Universal Fitment: No ), ( Country Of Origin: United States )

Review MUNCIE G.m. M330.d Speed Transmission Synchro Assembly All

The Muncie M21 3-speed transmission with model number 3911968, specifically designed for GM applications and engine type M330 HD, is a high-performance synchromesh transmission that delivers reliable shifting and smooth operation. This transmission is commonly found in classic cars and hot rods, particularly those with big block engines.

The Muncie M21 transmission is a manual transmission, featuring three forward gears and one reverse gear. The synchromesh technology integrated into this transmission ensures that shifting between gears is effortless and precise, even when the engine speed and transmission speed are not in perfect synchronization. This feature is particularly beneficial during cold starts or when shifting under heavy loads.

The 3911968 variant of this transmission comes with a reverse synchro, allowing for easy and smooth engagement of reverse gear. The reverse synchro helps reduce wear on the transmission components and provides a more positive feel when shifting into reverse.

The M330 HD transmission is a heavy-duty version, designed to handle the increased torque and power output of high-performance engines. The transmission case and input shaft are made of robust materials to ensure durability and longevity. The gears are precision machined for optimal strength and tooth contact, ensuring efficient power transfer and minimal wear.

This Muncie transmission is suitable for use in vehicles with a wide range of engine sizes and applications. It is an excellent choice for classic car enthusiasts, hot rod builders, and anyone seeking a reliable and high-performance manual transmission for their GM vehicle. With its smooth shifting, robust construction, and easy reverse engagement, this Muncie M21 3-speed transmission is an essential component for any serious automotive project.

Buying a Muncie M21 4-speed manual transmission with synchromesh for a GM M330 HD truck, specifically the 3911968 version, comes with several pros and cons that you should consider before making a purchase.

1. Durability: The Muncie M21 transmission is known for its robust design and durability. It was originally used in heavy-duty applications and has a reputation for withstanding high torque and power.

2. Availability: These transmissions are widely available on the aftermarket, making it relatively easy to find a used one in good condition.

3. Cost-effective: Compared to modern automatic transmissions, manual transmissions are generally less expensive to purchase and maintain.

4. Control: Manual transmissions offer more control over the vehicle, allowing the driver to shift gears at the optimal RPM for maximum power and fuel efficiency.

1. Complexity: Manual transmissions are more complex than automatic transmissions, requiring more maintenance and a greater understanding of gear ratios and synchronizers.

2. Shifting: Shifting gears in a heavy-duty truck with a manual transmission can be more challenging than in a lighter vehicle. The synchronizers in the Muncie M21 transmission can wear out over time, making shifting more difficult.

3. Clutch: The clutch in a manual transmission can wear out or fail, requiring replacement. This can be an expensive and labor-intensive repair.

4. Noise: A used Muncie M21 transmission may come with noise issues, such as clunking or grinding gears. These issues can be costly to diagnose and repair.

The Muncie M21 transmission with synchromesh for a GM M330 HD truck is a robust and durable option for those looking for a cost-effective and high-performance manual transmission. However, it requires more maintenance and a greater understanding of manual transmissions compared to automatic transmissions. Potential buyers should be prepared for the complexity and potential noise issues that come with a used Muncie M21 transmission.

If you are comfortable with the complexity and maintenance requirements of a manual transmission, and you are looking for a high-performance and cost-effective option for your GM M330 HD truck, then a used Muncie M21 transmission with synchromesh could be a good choice for you. However, it is important to thoroughly inspect the transmission before purchase and be prepared for potential repairs or replacements of worn parts. Alternatively, you may want to consider a rebuilt or new transmission to minimize the risk of noise issues and the need for immediate repairs.

Details:

P-10-30-25-25.

part #: 3911968 prices

• $12.00-$45.00

specifications manutransmission:

• brand: Muncie
• mpn: 3911968
• type: Synchro Assembly W 1 Used Ring
• oe/oem part number: Awt306-80 Borg-warner
• items included: N/a.
• material: Steel
• vintage part: Yes
• universal fitment: No
• country of origin: United States

offer manutransmission:

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

seller manutransmission:

• # reviews: 4172
• city: Merlin, Oregon
• rating: 99.5%

general manutransmission:

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

shipping manutransmission:

• type: Calculated
• service: USPS Priority Mail Small Flat Rate Box, USPS Ground Advantage
• carrier: USPS
• transit: 4-7 Days
• class: Expedited, Standard
• cost: $13.60

payments manutransmission:

• other
• wallet: Paypal
• credit card: Visa

returns manutransmission:

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

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