SX-1B65 NATIONAL Transmission Shaft Seal Manual Gaskets Gmc

Review NATIONAL Transmission Input Shaft Seal For Gmc P35 Manual Gaskets Hs for GMC 1975–1978

Introducing the National SX-1B65 transmission shaft seal, specifically designed for 1975-1978 GMC P35 manual transmission systems. This premium seal is an essential component in maintaining the optimal performance and longevity of your vehicle's transmission.

The SX-1B65 transmission shaft seal is meticulously engineered using high-quality materials, ensuring a perfect fit and reliable sealing capabilities. This seal is designed to prevent transmission fluid from leaking out, thus reducing the likelihood of costly repairs and potential engine damage.

The outer diameter of this seal measures 1.65 inches, while the inner diameter is 0.875 inches. Its length is 1.25 inches, making it a precise fit for the specified transmission shaft application. The seal's cross-sectional shape is a B-type, which offers an effective seal against the high-pressure transmission fluid.

The material composition of the National SX-1B65 transmission shaft seal is a vital consideration for its durability and functionality. The seal is manufactured from a synthetic rubber compound that exhibits excellent flexibility and resistance to both temperature extremes and transmission fluid. This compound ensures a long service life and retains its sealing properties even under the most challenging driving conditions.

Installing the National SX-1B65 transmission shaft seal is a straightforward process. It can be replaced as part of a routine maintenance schedule or when experiencing transmission fluid leaks. Proper installation is crucial for the seal's effectiveness, and following the instructions provided in the user manual is essential for achieving the best results.

In conclusion, the National SX-1B65 transmission shaft seal is an essential upgrade for maintaining the performance and longevity of your 1975-1978 GMC P35 manual transmission system. Its precision engineering, high-quality materials, and effective sealing capabilities make it an invaluable addition to your vehicle's maintenance regimen.

Buying a National SX-1B65 transmission shaft seal for a 1975-1978 GMC P35 manual transmission comes with both advantages and disadvantages. Here are some potential pros and cons to consider:

1. OEM Replacement: This seal is an original equipment manufacturer (OEM) replacement, which means it is designed and manufactured to meet the same specifications as the seal originally installed in the vehicle.

2. Reliable: A high-quality seal can help prevent transmission fluid leaks, which can save you from costly transmission repairs or replacements in the future.

3. Easy Installation: The seal is relatively simple to install, and can typically be done as a DIY project with common hand tools.

1. Cost: The National SX-1B65 transmission shaft seal can be more expensive than aftermarket alternatives, which may be a consideration for some budget-conscious consumers.

2. Availability: Depending on your location and the availability of parts from local suppliers, you may need to order the seal online, which can add to the overall cost and wait time.

3. Potential for Overspending: If you are unsure about the exact seal you need, or if you are not confident in your ability to diagnose the issue with your transmission, you may end up spending more money on parts or labor than necessary.

In conclusion, the decision to buy a National SX-1B65 transmission shaft seal for your 1975-1978 GMC P35 manual transmission depends on your specific needs and circumstances. If you value the peace of mind that comes with using an OEM replacement part, and you are confident in your ability to install it yourself, then this may be the best option for you. However, if cost is a major concern, or if you are not certain about the exact part you need, you may want to consider alternative options before making a purchase. Ultimately, it's important to weigh the pros and cons carefully and make an informed decision based on your unique situation.

Details:

National transmission input shaft seal for 1975-1978 Gmc p35 manual gaskets hs: status: in stock.

specifications differentialsdepo:

• for makes: Gmc
• for years: 1975–1978
• brand: National
• mpn: Sx-1b65
• placement on vehicle: Transmission Gaskets Sealing Systems
• type: Manual Transmission Input Shaft Seal
• item length: 2.750
• manufacturer warranty: 1 Year
• ipn: C518 10-32
• compatible model: P35
• compatible year: 1978 1977 1976 1975
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine National Manual Transmission Input Shaft Seal

seller differentialsdepo:

• # reviews: 562219
• rating: 98.7%
• city: indianapolis, indiana

offer differentialsdepo:

• started: august 8, 2025
• in stock #: 1
• options: ship-to-home
• availability: in stock
• sold #: 16
• price: $15.60
• item condition: New

payments differentialsdepo:

• other
• credit card: visa
• wallet: apple-pay

shipping differentialsdepo:

• service: standard, expedited
• transit: 3-5 days
• type: fixed
• class: standard, expedited

general differentialsdepo:

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

returns differentialsdepo:

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