GM 906879 Nos Propeller Shaft Ctr Bearing 970970

( Brand: Gm ), ( Manufacturer Part Number: 906879 ), ( Type: Center Support Bearing ), ( Ipn: 970970 ), ( Country Of Origin: United States )

Review GM Cadillac Chevrolet Truck Nos Propeller Shaft Ctr Bearing fits 1946–1956

The **GM 906879 Propeller Shaft Center Bearing Assembly (1946 1956 Cadillac & Chevrolet)** is a meticulously engineered, high-performance component designed to ensure smooth, vibration-free power transmission in classic American vehicles from the post-war era. This bearing assembly serves as the critical pivot point for the driveshaft, supporting its central section while allowing for precise articulation as the vehicle navigates turns, bumps, or uneven road surfaces. Crafted from durable, heat-treated steel and reinforced with a robust ball-bearing or roller-bearing system depending on the specific model variant this part is engineered to withstand the demanding stresses of high-torque engine outputs, often found in the powerful V8 powerplants of the era, such as the iconic Cadillac Series 62 or the rugged Chevrolet 265/283 cubic-inch engines. The bearing s precision-machined housing is designed to fit seamlessly into the driveshaft s universal joint yokes, ensuring minimal play and optimal alignment, which is essential for maintaining driveline integrity and preventing premature wear on the surrounding components, including the universal joints, axle housings, and transmission output shafts. Whether restoring a showroom-fresh 1948 Cadillac Fleetwood or reviving a rugged Chevrolet pickup from the 1950s, this bearing assembly is an indispensable upgrade for enthusiasts seeking to eliminate driveline noise, reduce vibration, and enhance the overall driving experience. Its compatibility with a wide range of GM applications from this era makes it a versatile choice for both restoration projects and performance modifications, ensuring reliable operation under a variety of conditions, from cruising on smooth highways to tackling rough backroads. Built to exacting standards, this part is a testament to the engineering prowess of the mid-20th century, offering a blend of durability and precision that aligns perfectly with the timeless appeal of these legendary vehicles.

### **Pros and Cons of Buying a 1946 1956 Cadillac/Chevy NOS Propeller Shaft Center Bearing (GM Part #906879)**

1. **Authentic Replacement Part** This is a **New Old Stock (NOS)** bearing, meaning it is a genuine GM factory part from the original production run. It will match the original specifications and fit perfectly without modifications.

2. **High Quality and Durability** Cadillac and Chevrolet engines of this era were built to last, and their original bearings were designed for heavy-duty use. A NOS bearing will provide reliable performance, especially in classic cars that see regular use.

3. **Preservation of Originality** If you are restoring or maintaining a period-correct vehicle, using an NOS part ensures authenticity. Many classic car enthusiasts prioritize original or NOS components to preserve the vehicle s historical integrity.

4. **No Modern Compromises** Unlike aftermarket or remanufactured parts, which may use different materials or coatings, an NOS bearing retains the original design, which could be preferable for those seeking a "pure" restoration.

5. **Potential for Increased Value** If you plan to sell or trade the vehicle in the future, having original or NOS components can enhance its appeal to collectors and purists.

6. **Ease of Installation** Since it is a direct replacement, installation should be straightforward, requiring only basic tools and mechanical knowledge.

7. **Rarity and Collectibility** NOS parts from this era are becoming increasingly scarce, making this bearing a desirable find for serious collectors.

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1. **High Cost** NOS parts are significantly more expensive than aftermarket or remanufactured alternatives. The price reflects their age, rarity, and historical value, which may not be justified for casual or infrequently used vehicles.

2. **Limited Availability** Finding a NOS bearing in good condition can be difficult, and sourcing may require searching through collectors, auctions, or specialty suppliers, which can be time-consuming.

3. **Potential for Wear or Damage** Even NOS parts can degrade over time if stored improperly. Some may show signs of wear, rust, or minor defects that could affect performance or longevity.

4. **Overkill for Some Applications** If the vehicle is only used occasionally or for show, the benefits of an NOS bearing may not outweigh the cost. Aftermarket bearings, while not original, are often sufficient for light use.

5. **No Warranty or Guarantee** NOS parts are sold as-is, with no manufacturer warranty. If the bearing fails prematurely, there is no recourse beyond returning it to the seller (if possible).

6. **Maintenance Challenges** Older bearings may require more frequent lubrication or inspection compared to modern counterparts, adding to long-term maintenance costs.

7. **Ethical and Practical Concerns** Some argue that using NOS parts contributes to the depletion of historical inventory, making them less available for future restorations. This is a debated point among enthusiasts.

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Buying a **1946 1956 Cadillac/Chevy NOS propeller shaft center bearing (GM #906879)** is a **highly desirable choice for purists, collectors, and those restoring vehicles to factory specifications**. The part offers unmatched authenticity, durability, and historical value, making it ideal for enthusiasts who prioritize originality and long-term reliability. However, the **significant cost, rarity, and lack of warranty** make it less practical for casual or infrequent users.

For most **daily-driven or lightly used classic cars**, a **high-quality aftermarket or remanufactured bearing** would be a more cost-effective and practical alternative. But if you are **committed to a period-correct restoration, collecting original parts, or preserving a vehicle s heritage**, the NOS bearing is a worthwhile investment.

- You are restoring a classic car to factory specifications.

- You are a collector who values original components.

- You have the budget to justify the premium cost.

- The vehicle is used regularly and you want the best possible longevity.

- The car is used infrequently or primarily for display.

- You want to save money without sacrificing performance.

- You prefer parts with warranties or modern reliability improvements.

Ultimately, the decision depends on your **budget, priorities, and how you plan to use the vehicle**. For true enthusiasts, the NOS bearing is a **once-in-a-lifetime opportunity** to own a piece of automotive history. For others, a balance between cost and authenticity may be preferable.

Details:

1946 - 1959 Chevrolet 3/4 ton and 1 trucks. 1948 - 1955 Chevrolet Utility. 1941 - 1942 Chevrolet Commercial Pickup, Panel and Suburban Utility Big Truck. Brand new, still in original GM box.

1950 - 1956 Cadillac Commercial Chassis and 75 Limousine.

part #: 906879 prices

• $24.50-$39.99

specifications universajoin:

• for makes: Cadillac, Chevrolet
• for years: 1946-1956
• brand: Gm
• mpn: 906879
• type: Center Support Bearing
• ipn: 970970
• country of origin: United States

offer universajoin:

• availability: In Stock
• started: May 31, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0

shipping universajoin:

• carrier: USPS
• class: Expedited
• transit: 8-13 Days
• type: Calculated
• service: USPS Priority Mail Small Flat Rate Box
• cost: $16.65

seller universajoin:

• city: Toledo, Ohio
• # reviews: 19244
• rating: 100.0%

general universajoin:

• Transmission Drivetrain > Driveshafts Parts > Driveshaft Bearings U-Joints
• condition: Used

payments universajoin:

• wallet: Google-pay
• credit card: Diners-club
• other

returns universajoin:

• policy: No Returns

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