NATIONAL C631 Rear Outer Differential Pinion Seal Avanti 59-17

( Brand: National ), ( Manufacturer Part Number: 1964 ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C631 59-17 ), ( Placement On Vehicle: Driveline Axles Gaskets Sealing Systems ), ( Compatible Model: Avanti ), ( Compatible Year: 1964 1963 ), ( Core Charge: Free No Core Charge ), ( Position: Rear Outer ), ( Type: Differential Pinion Seal ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine National Differential Pinion Seal )

Review NATIONAL 59-17 Rear Outer Differential Pinion Seal For Studebaker Avanti fits XF 1963–1964

Introducing the National C631 59-17 rear outer differential pinion seal for the iconic 1963-1964 Studebaker Avanti XF. This essential automotive component is meticulously engineered to provide optimal performance and reliability for your classic vehicle.

The National C631 59-17 seal is specifically designed for the rear outer differential on Studebaker Avanti XF models from the years 1963 and 1964. It is made from high-quality materials that are resistant to wear and tear, ensuring a long service life. The seal effectively prevents differential fluid from leaking out, keeping your vehicle's drivetrain properly lubricated and functioning efficiently.

This seal features a precise fit, ensuring a secure connection to the differential housing. It is designed to withstand the high torque loads generated by the differential, making it an ideal choice for the powertrain of your Studebaker Avanti XF. The National C631 59-17 seal is also easy to install, making it a hassle-free solution for maintaining the health of your classic car's drivetrain.

The National C631 59-17 rear outer differential pinion seal is an essential upgrade for any Studebaker Avanti XF owner who wants to ensure the longevity and reliability of their vehicle. Its high-quality construction and precise fit make it an excellent choice for those who demand the best for their classic car.

In conclusion, the National C631 59-17 rear outer differential pinion seal is an essential automotive component for the 1963-1964 Studebaker Avanti XF. Its high-quality construction, precise fit, and ability to prevent differential fluid leaks make it an indispensable upgrade for any Studebaker Avanti XF owner who wants to maintain the optimal performance and reliability of their classic vehicle.

Buying a National C631 59-17 Rear Outer Differential Pinion Seal for a 1963-1964 Studebaker Avanti XF: A Comprehensive Analysis

The National C631 59-17 rear outer differential pinion seal is designed for use in Studebaker Avanti XF models from 1963 to 1964. This part seals the differential pinion to the housing and prevents oil leakage.

- OEM Quality: This seal is a direct replacement part from National, ensuring a perfect fit and function.

- Leak Prevention: A faulty pinion seal can lead to significant oil loss, potentially damaging the differential unit. Replacing it with a new seal will prevent such issues.

- Improved Performance: A properly sealed differential ensures smooth power transmission to the driven wheels, improving overall vehicle performance.

- Cost: Replacing a differential pinion seal can be an expensive repair, especially when considering labor costs.

- Availability: Depending on your location, finding this specific part may take some time, potentially leading to extended downtime for your vehicle.

Instead of purchasing a new seal, some mechanics recommend using a sealant or gasket maker to seal the leak temporarily. However, this is not a long-term solution, and the seal will eventually fail again.

A National C631 59-17 rear outer differential pinion seal is an essential repair for a 1963-1964 Studebaker Avanti XF with a leaking pinion seal. While the cost may be a concern, the benefits of a properly sealed differential far outweigh the potential drawbacks, such as improved performance and the prevention of further damage to the differential unit.

If you own a 1963-1964 Studebaker Avanti XF and suspect a leaking pinion seal, it is recommended to replace the seal with a new OEM part from a reputable supplier, such as National, to ensure optimal vehicle performance and longevity.

Details:

National Rear Outer Differential Pinion Seal for 1963-1964 Studebaker Avanti Xf: Status: In Stock.

specifications parthick:

• for models: Xf
• for makes: Studebaker
• for years: 1963-1964
• brand: National
• mpn: 1964
• manufacturer warranty: 1 Year
• ipn: C631 59-17
• placement on vehicle: Driveline Axles Gaskets Sealing Systems
• compatible model: Avanti
• compatible year: 1964 1963
• core charge: Free No Core Charge
• position: Rear Outer
• type: Differential Pinion Seal
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine National Differential Pinion Seal

offer parthick:

• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: February 16, 2026
• sold: 0

payments parthick:

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

general parthick:

• condition: New
• Parts Accessories > Car Truck Parts Accessories > Other Car Truck Parts Accessories

seller parthick:

• # reviews: 623284
• rating: 99.5%
• city: Indianapolis, Indiana

returns parthick:

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

shipping parthick:

• service: Standard, Expedited
• cost: $0.00
• class: Standard, Expedited
• transit: 3-7 Days
• type: Fixed

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