C397 NATIONAL Transmission Shaft Seal Manual Desoto

Review NATIONAL 42-49 Transmission Output Shaft Seal For Desoto S-11 Manual for DESOTO 1946–1948

Introducing the National C397 transmission shaft seal, a critical component designed specifically for Desoto S-11 manual transmission vehicles produced between 1946 and 1948. This seal ensures an airtight connection between the transmission shaft and the oil pan, preventing oil leaks and maintaining the overall performance and efficiency of your vehicle's powertrain.

The C397 transmission shaft seal is manufactured using a high-quality, durable rubber compound that delivers exceptional sealing properties. The seal's cross-sectional design features an inner diameter that perfectly fits the transmission shaft, while its outer diameter matches the oil pan's contour. The seal's lip, which comes into contact with the oil pan, is designed to create a tight seal, preventing oil from escaping.

This National transmission shaft seal is a direct replacement part, meaning it is an exact match for the original equipment that came with your Desoto S-11. It is designed to fit seamlessly into the existing gasket groove in the oil pan, eliminating the need for additional modifications or adjustments.

Installing the C397 transmission shaft seal is a straightforward process. Simply remove the old seal and the surrounding gasket material, clean the area thoroughly, and then install the new seal. Be sure to follow the recommended installation procedures to ensure proper seating and to avoid any potential issues.

In summary, the National C397 transmission shaft seal is a high-quality, essential replacement part for Desoto S-11 manual transmission vehicles from 1946 to 1948. It provides an airtight seal between the transmission shaft and the oil pan, preventing oil leaks and maintaining the efficiency of your vehicle's powertrain. This seal is a direct replacement part that is easy to install and is designed to provide long-lasting performance.

Buying a National C397 transmission shaft seal for a 1946-1948 Desoto S-11 manual transmission vehicle involves considering both the advantages and disadvantages of the purchase.

1. OEM Part: This seal is an original equipment manufacturer (OEM) part, which means it is specifically designed and manufactured to fit and function optimally in your transmission system.

2. Proper Sealing: A faulty shaft seal can lead to significant transmission issues, such as leaks, loss of power, and damage to other components. Replacing the seal with an OEM part can help prevent these problems.

3. Improved Performance: A new seal can help restore the transmission's performance to its original condition, allowing for smoother shifts and improved overall drivability.

4. Longer Lifespan: A high-quality OEM seal is designed to last longer than aftermarket alternatives, reducing the need for future repairs.

1. Cost: OEM parts are typically more expensive than aftermarket alternatives. The cost of the National C397 seal may be higher than some aftermarket seals, but the benefits may outweigh the additional cost.

2. Availability: OEM parts may be more difficult to find than aftermarket alternatives, especially for older vehicles like the 1946-1948 Desoto S-11. This could mean longer wait times for the part or additional shipping costs.

3. Installation: Installing an OEM seal may require specialized tools or knowledge, which could add to the overall cost of the repair.

In conclusion, while the cost of an OEM National C397 transmission shaft seal for a 1946-1948 Desoto S-11 may be higher than aftermarket alternatives, the benefits of using an OEM part include proper sealing, improved performance, and a longer lifespan. These advantages can help prevent future transmission issues and ensure the longevity of the vehicle.

If you are experiencing transmission issues or suspect that your shaft seal is faulty, it is recommended to invest in a high-quality OEM National C397 transmission shaft seal. While the upfront cost may be higher, the long-term benefits and peace of mind that come with using an OEM part are well worth the investment. Additionally, it's important to ensure that you source the part from a reputable supplier to ensure the authenticity and quality of the part.

Details:

National transmission output shaft seal for 1946-1948 Desoto s-11 manual cc: status: in stock.

specifications differentialsdepo:

• for makes: Desoto
• for years: 1946–1948
• brand: National
• mpn: 1948
• placement on vehicle: Transmission Gaskets Sealing Systems
• type: Manual Transmission Output Shaft Seal
• item length: 2.750
• manufacturer warranty: 1 Year
• ipn: C397 42-49
• compatible model: S-11
• compatible year: 1948 1947 1946
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine National Manual Transmission Output Shaft Seal

shipping differentialsdepo:

• transit: 2-6 days
• class: standard, expedited
• type: fixed
• service: standard, expedited

returns differentialsdepo:

• time: 30 days
• policy: returns accepted
• paid by: seller

payments differentialsdepo:

• wallet: google-pay
• credit card: diners-club
• other

general differentialsdepo:

• category: Auto Parts > Transmission Drivetrain > Differentials, Assemblies > Additional

seller differentialsdepo:

• city: indianapolis, indiana
• rating: 99.6%
• # reviews: 645840

offer differentialsdepo:

• options: ship-to-home
• availability: in stock
• in stock #: 5
• sold #: 10
• started: april 16, 2026
• prices: $11.86–$16.82
• item condition: New