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  3. NATIONAL SX-MB39

NATIONAL SX-MB39 Transfer Shaft Seals Rj

fits model: K25, K2500. make: Gmc. year: 1969–1974.

Sx-mb39 National 2 Pc Transfer Case Shift Shaft Seals For 1969-1974 Gmc K25 K2500 Rj

( Brand: National ), ( Manufacturer Part Number: SX-MB39 ), ( Type: Transfer Case Shift Shaft Seal ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C620 25-9 ), ( Item Length: 2.000 ), ( Placement On Vehicle: Transfer Case Gaskets Sealing Systems ), ( Compatible Model: K25/k2500 Suburban ), ( Compatible Year: 1974 1973 1972 1971 1970 1969 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 2 Pc Genuine National Transfer Case Shift Shaft Seal Kit )

Review NATIONAL Pc Transfer Case Shift Shaft Seals For Gmc Rj fits K25 K2500 1969–1974

Introducing the National SX-MB39 Transfer Shaft Seals, specifically designed for the GMC K25 and K2500 trucks manufactured between the years 1969 and 1974 with RJ transmission. These seals are an essential component of your vehicle's drivetrain system, responsible for preventing transmission fluid from leaking out and maintaining the internal pressure required for smooth operation.

The SX-MB39 Transfer Shaft Seals are manufactured using high-quality materials that provide excellent sealing performance and durability. The seals are engineered to fit precisely into the transfer case, ensuring a perfect seal every time. These seals are made to withstand the rigors of heavy-duty use, making them an ideal choice for those who depend on their trucks for work or adventurous pursuits.

The outer seals feature a robust design that protects against the intrusion of debris and contaminants, while the inner seals are designed to provide a tight seal against the transfer shaft, preventing any fluid loss. The seals are also resistant to the harsh effects of extreme temperatures, ensuring that they perform effectively in both hot and cold environments.

Installation of the National SX-MB39 Transfer Shaft Seals is a straightforward process. Each seal comes with detailed installation instructions to help ensure a hassle-free experience. The seals are supplied in sets of two, one for each side of the transfer case, and are sold exclusively for use with the RJ transmission found in the 1969-1974 GMC K25 and K2500 trucks.

In summary, the National SX-MB39 Transfer Shaft Seals are a must-have for GMC K25 and K2500 truck owners with RJ transmissions manufactured between 1969 and 1974. These seals offer superior sealing performance, durability, and resistance to extreme temperatures, ensuring that your vehicle's drivetrain system operates at peak efficiency and reliability.

National SX-MB39 transfer shaft seals are aftermarket seals designed for GMC K25 and K2500 (RJ series) trucks manufactured between 1969 and 1974. Replacing the transfer shaft seals can help prevent leaks and improve the performance of your vehicle's drivetrain. In this analysis, we will discuss the potential advantages and disadvantages of purchasing these aftermarket seals.

Advantages of Buying National SX-MB39 Transfer Shaft Seals:

1. Cost-effective: Aftermarket parts, including transfer shaft seals, are generally more affordable compared to genuine OEM (Original Equipment Manufacturer) parts. National SX-MB39 seals offer a cost-effective solution for repairing a leaking transfer shaft.

2. Availability: Aftermarket parts, like National SX-MB39 transfer shaft seals, are often more readily available compared to OEM parts. This means you can get the parts you need sooner, without having to wait for an extended period for an order to be fulfilled.

3. Versatility: Aftermarket parts, such as National SX-MB39 transfer shaft seals, are typically designed to fit a wider range of vehicles and applications. This means that they may be a suitable option for older GMC trucks, even if OEM parts are no longer available.

Disadvantages of Buying National SX-MB39 Transfer Shaft Seals:

1. Quality concerns: Some aftermarket parts, including transfer shaft seals, may not meet the same quality standards as OEM parts. This could lead to issues such as premature wear or failure. However, reputable aftermarket manufacturers like National often have rigorous testing and quality control processes in place to ensure their products meet or even exceed OEM specifications.

2. Compatibility: While aftermarket parts are designed to fit a wide range of vehicles, there is always a risk of compatibility issues. It's important to ensure that the National SX-MB39 transfer shaft seals are compatible with your specific GMC K25 or K2500 (RJ series) truck by checking the manufacturer's specifications and consulting with a knowledgeable mechanic or parts expert.

3. Warranty: OEM parts often come with longer warranties compared to aftermarket parts. If you value the peace of mind that comes with a comprehensive warranty, you may prefer to opt for OEM transfer shaft seals instead.

Conclusion:

In conclusion, the decision to buy National SX-MB39 transfer shaft seals for your 1969-1974 GMC K25 or K2500 (RJ series) truck depends on your priorities and circumstances. If you're looking for a cost-effective and readily available solution for a leaking transfer shaft, aftermarket seals like National SX-MB39 may be an excellent choice. However, if you prioritize OEM quality and a longer warranty, you may prefer to invest in genuine OEM parts. Ultimately, it's essential to consider the specific needs of your vehicle and your personal preferences when making a decision.

Recommendation:

My recommendation would be to carefully research the various options available for transfer shaft seals for your GMC K25 or K2500 (RJ series) truck. Consider the factors discussed above, such as cost, availability, compatibility, quality, and warranty. Consult with a knowledgeable mechanic or parts expert to help you make an informed decision based on your specific situation. Whether you choose National SX-MB39 aftermarket seals or OEM seals, ensuring a proper installation will help ensure the longevity and performance of your vehicle's drivetrain.

Details:

2 pc National Transfer Case Shift Shaft Seals for 1969-1974 GMC K25 K2500 rj: Status: In Stock.

part #: sxmb39 price

  • $18.32

specifications manutransmission:

  • for models: K25, K2500
  • for makes: Gmc
  • for years: 1969-1974
  • brand: National
  • mpn: Sx-mb39
  • type: Transfer Case Shift Shaft Seal
  • manufacturer warranty: 1 Year
  • ipn: C620 25-9
  • item length: 2.000
  • placement on vehicle: Transfer Case Gaskets Sealing Systems
  • compatible model: K25/k2500 Suburban
  • compatible year: 1974 1973 1972 1971 1970 1969
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement
  • bundle description: 2 Pc Genuine National Transfer Case Shift Shaft Seal Kit

seller manutransmission:

  • rating: 98.7%
  • # reviews: 561699
  • city: Indianapolis, Indiana

general manutransmission:

  • condition: New
  • Car Truck Parts Accessories > Transmission Drivetrain > Manual Transmission Parts

offer manutransmission:

  • availability: In Stock
  • started: August 1, 2025
  • quantity: 2
  • sold: 0
  • options: Ship-to-home

returns manutransmission:

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

payments manutransmission:

  • other
  • credit card: Visa
  • wallet: Paypal

shipping manutransmission:

  • cost: $0.00
  • type: Fixed
  • transit: 3-5 Days
  • service: Standard, Expedited
  • class: Standard, Expedited
for models: k25, k2500, for makes: gmc, for years: 1969-1974, type: transfer case shift shaft seal, manufacturer warranty: 1 year, item length: 2.000, placement on vehicle: transfer case gaskets sealing systems, compatible model: k25/k2500 suburban, compatible year: 1974 1973 1972 1971 1970 1969, core charge: free no core charge, fitment type: direct replacement, bundle description: 2 pc genuine national transfer case shift shaft seal kit,
category: auto parts > car truck parts accessories > transmission drivetrain > manual transmission parts, sku: 7103079164115792,

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