SX-YM4A NATIONAL Transmission Shaft Seal International Ni

Review NATIONAL Transmission Output Shaft Seal For International Ni for M1100 1965–1972

Introducing the National SX-YM4A transmission shaft seal, a crucial component designed specifically for International M1100 Ni trucks produced between 1965 and 1972. This seal is essential for maintaining the integrity of your vehicle's transmission system by preventing the leakage of transmission fluid.

The SX-YM4A transmission shaft seal is an OEM (original equipment manufacturer) replacement part that boasts a high-quality design to ensure a perfect fit and optimal performance. It is engineered using advanced materials that offer exceptional resistance to wear and tear, allowing it to endure the rigors of heavy-duty use.

This transmission shaft seal features a dynamic lip design that provides an effective seal against high-pressure transmission fluid, while still allowing for smooth shaft movement. The lip is reinforced with a durable rubber compound that resists swelling, cracking, and other forms of damage that can lead to leaks.

The National SX-YM4A transmission shaft seal comes in a set, including both the inner and outer seals. Both seals are precision-machined to ensure a perfect fit and easy installation. They are also designed to work in harmony to provide a tight, leak-free seal around the transmission shaft.

Installation of this seal is a relatively straightforward process, but it is essential to follow the manufacturer's instructions carefully to ensure proper alignment and seating. Proper installation will help extend the life of the seal and minimize the risk of transmission leaks.

In summary, the National SX-YM4A transmission shaft seal is an essential upgrade for any International M1100 Ni truck from 1965 to 1972. It offers superior sealing performance, durability, and ease of installation, making it an excellent choice for those looking to maintain the reliability and longevity of their vehicle's transmission system.

Pros and Cons of Buying a National SX-YM4A Transmission Shaft Seal for 1965-1972 International M1100 Ni

a. Designed specifically for 1965-1972 International M1100 Ni trucks, ensuring a proper fit and function.

b. Made by National Sealing Products, a reputable and trusted manufacturer in the automotive industry.

c. Replacing a worn or leaking transmission shaft seal can prevent further damage to the transmission and other components.

d. Seals are an essential part of maintaining the overall performance and longevity of the vehicle.

a. The purchase price might be higher than aftermarket or used seals.

b. Installation may require some mechanical skills and knowledge.

c. Availability could be limited compared to general aftermarket parts, potentially causing longer delivery times.

Buying a National SX-YM4A Transmission Shaft Seal for your 1965-1972 International M1100 Ni comes with several advantages, such as proper fit, reliability, and peace of mind that your investment is backed by a reputable manufacturer. However, the higher cost compared to aftermarket or used seals should be considered. If you are comfortable with the installation process and want a high-quality, guaranteed fit, this seal is an excellent choice.

If you are looking for a replacement transmission shaft seal for your 1965-1972 International M1100 Ni and are willing to invest in a high-quality product from a trusted manufacturer, the National SX-YM4A is a recommended option. However, if budget is a concern, you may want to explore aftermarket or used seals as alternatives. Always ensure that the seal you choose is compatible with your specific vehicle model and year.

Details:

specifications differentialsdepo:

• for models: M1100
• for years: 1965–1972
• brand: National
• mpn: Sx-ym4a
• placement on vehicle: Transmission Gaskets Sealing Systems
• type: Manual Transmission Output Shaft Seal
• item length: 3.250
• manufacturer warranty: 1 Year
• ipn: C645 75-24
• compatible make: International
• compatible year: 1972 1971 1970 1969 1968 1967 1966 1965
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine National Manual Transmission Output Shaft Seal

offer differentialsdepo:

• sold #: 8
• started: march 28, 2026
• prices: $18.65–$23.13
• item condition: New
• in stock #: 2
• availability: in stock
• options: ship-to-home

returns differentialsdepo:

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

shipping differentialsdepo:

• class: standard, expedited
• transit: 3-6 days
• type: fixed
• service: standard, expedited

seller differentialsdepo:

• # reviews: 638416
• rating: 99.6%
• city: indianapolis, indiana

general differentialsdepo:

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

payments differentialsdepo:

• other
• credit card: diners-club
• wallet: paypal