MUNCIE 3911960 Transmission Mainshaft Car G.m. M330 H.d

( Brand: Muncie ), ( Manufacturer Part Number: 3911960 ), ( Type: Output Shaft ), ( Oe/oem Part Number: Awt306-2 Botg-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 Used Mainshaft To Car Truck fits 1969–1976

The Muncie M21/M22/M31/M41 3-speed automatic transmission mainshaft is a critical component for 1969 to 1976 GM cars, including those with the M330 HD (Heavy-Duty) option. This mainshaft is specifically designed for use in the Muncie 3-speed automatic transmissions with model numbers 391 and 400, which were widely used in various GM vehicles during this era.

The mainshaft is a hollow, forged steel component that transfers power from the input shaft to the planetary gears and the output shaft. Its robust construction and precise machining ensure efficient power transfer and long-lasting durability. It features a unique splined design on both ends, which allows it to connect securely with the input and output shafts.

The M21/M22/M31/M41 mainshafts are known for their high torque capacity, making them an ideal choice for heavy-duty applications. The M330 HD option further enhances the mainshaft's capabilities by increasing its size and strengthening its construction, making it better suited for the demands of high-performance vehicles or vehicles that are subjected to heavy use.

* Precision-machined splines for a secure and accurate fit with the input and output shafts.

* High-strength forged steel construction for superior durability.

* Enhanced size and strength for the M330 HD application.

* Suitable for use in various applications, including stock, performance, and racing applications.

* Designed to meet or exceed OEM specifications for optimal performance and longevity.

When it comes time to replace the mainshaft in your 1969 to 1976 GM car with a Muncie 3-speed automatic transmission, consider investing in a high-quality aftermarket replacement like the Muncie M330 HD transmission mainshaft. By choosing a replacement part that is specifically designed for your application, you can ensure that your transmission performs at its best and lasts as long as possible.

Buying a Muncie M21/M22 3-speed automatic transmission mainshaft for a 1969-1976 GM car with a 391 or 396 big-block engine and an M330 HD transmission can be a crucial decision for car enthusiasts and mechanics. Here are some pros and cons to consider before making a purchase.

1. Availability: The Muncie M21/M22 transmissions are widely used in classic cars, making the mainshaft a commonly sought-after part.

2. Durability: The mainshaft is a robust component that can handle the torque produced by big-block engines.

3. Affordability: Compared to rebuilding or purchasing a new transmission, buying a used mainshaft can be a more cost-effective solution.

1. Wear and Tear: A used mainshaft may have some degree of wear, which could lead to performance issues or the need for further repairs.

2. Quality Variability: The quality of used mainshafts can vary greatly, making it essential to ensure the part is from a reputable seller.

3. Fitment: While the Muncie M21/M22 transmissions are common, there are different variations and submodels, so it's crucial to ensure the mainshaft is a perfect fit for your specific vehicle.

Purchasing a used Muncie M21/M22 transmission mainshaft for a 1969-1976 GM car with a 391 or 396 big-block engine and an M330 HD transmission can offer affordability and durability. However, there is a risk of wear and variability in quality. To mitigate these risks, it's essential to buy from a trustworthy seller and verify that the mainshaft is the correct fit for your vehicle.

If you're confident in your mechanical abilities and have the necessary tools, consider purchasing a used Muncie M21/M22 transmission mainshaft from a reputable seller. If you're unsure or prefer a more reliable solution, consider having the existing mainshaft rebuilt or purchasing a remanufactured one from a trusted transmission shop.

Details:

P-10-30-25-39.

part #: 3911960 prices

• $12.00-$45.00

specifications manutransmission:

• for years: 1969-1976
• brand: Muncie
• mpn: 3911960
• type: Output Shaft
• oe/oem part number: Awt306-2 Botg-warner
• items included: N/a.
• material: Steel
• vintage part: Yes
• universal fitment: No
• country of origin: United States

shipping manutransmission:

• type: Calculated
• class: Standard, Expedited
• service: USPS Ground Advantage, USPS Priority Mail
• transit: 4-10 Days
• cost: $26.05
• carrier: USPS

general manutransmission:

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

payments manutransmission:

• wallet: Paypal
• credit card: Discover
• other

offer manutransmission:

• options: Ship-to-home
• started: October 31, 2025
• availability: In Stock
• quantity: 1
• sold: 0

seller manutransmission:

• rating: 99.5%
• # reviews: 4171
• city: Merlin, Oregon

returns manutransmission:

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

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