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  3. NATIONAL SX-XQ99

NATIONAL SX-XQ99 Shaft Seal Kit Manual

fits model: C25, Suburban. make: Gmc. year: 1975–1978.

Sx-xq99 National Output Shaft Seal Kit For 1975-1978 Gmc C25 Suburban Manual Br

( Brand: National ), ( Manufacturer Part Number: SX-XQ99 ), ( Type: Manual Transmission Output Shaft Seal Kit ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C409 56-21 ), ( Item Length: 2.750 ), ( Placement On Vehicle: Transmission Gaskets Sealing Systems ), ( Compatible Model: C25 Suburban ), ( Compatible Year: 1978 1977 1976 1975 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine National Manual Transmission Output Shaft Seal Kit )

Review NATIONAL Output Shaft Seal Kit For Gmc Manual Br fits SUBURBAN C25 1975–1978

Introducing the National SX-XQ99 Shaft Seal Kit, specifically designed for the 1975-1978 GMC C25 Suburban with manual transmission. This premium seal kit is an essential upgrade for those looking to maintain or restore their classic vehicle's powertrain.

The National SX-XQ99 Shaft Seal Kit includes all the necessary components to replace the worn-out seals in your Suburban's driveline. The kit comprises five (5) shaft seals, two (2) universal joint boots, and two (2) grease seals. These high-quality parts are meticulously engineered to provide a perfect fit and reliable performance.

Each shaft seal is manufactured using advanced materials, such as high-performance elastomers and durable metal components. These materials ensure that the seals can withstand the heavy loads and extreme temperatures commonly encountered in off-road and towing applications. Additionally, the seals are designed to provide an effective seal against oil, grease, and contaminants, ensuring optimal powertrain efficiency and longevity.

The universal joint boots in this kit are made from heavy-duty, heat-resistant rubber. These boots protect the joints from damage caused by road debris, water, and other environmental factors. The boots also allow for smooth, flexible joint movement while maintaining a tight seal to prevent leaks.

The grease seals in the National SX-XQ99 Shaft Seal Kit are designed to keep grease contained within the axle housing, ensuring that your driveline remains well lubricated and free from harmful contaminants. The seals are made from a flexible, yet durable material that can withstand the rigors of off-road use.

Installing the National SX-XQ99 Shaft Seal Kit is a straightforward process that can be completed with common hand tools. The kit comes with clear, easy-to-follow instructions to guide you through the installation process.

In summary, the National SX-XQ99 Shaft Seal Kit is an essential upgrade for any 1975-1978 GMC C25 Suburban owner looking to maintain or restore their vehicle's powertrain. This premium kit includes all the necessary components to replace worn-out seals and ensures reliable performance, optimal efficiency, and extended driveline life.

Buying a National SX-XQ99 shaft seal kit for a 1975-1978 GMC C25 Suburban manual transmission vehicle can be a good investment for those experiencing leaks or damage to their existing seal. This part is crucial for maintaining the transmission fluid and preventing potential engine damage. Let's discuss some pros and cons to help you make an informed decision.

Pros:

1. Reliability: National is a well-known brand in the automotive industry, and their SX-XQ99 shaft seal kit is known for its durability and longevity. These seals are designed to provide a tight seal and prevent leaks, ensuring a reliable driving experience.

2. Convenience: By purchasing a complete kit, you will receive all the necessary parts, including the seals and other required components, making the installation process more straightforward and efficient.

3. Cost-effective: Replacing a single seal can be time-consuming and costly, as it may require removing the transmission. With a complete kit, you can replace multiple seals at once, which can save you money in the long run.

Cons:

1. Cost: While the kit may save you money by allowing you to replace multiple seals at once, the upfront cost can still be significant. It's essential to consider the cost-effectiveness based on your specific situation and the potential savings from avoiding future repairs.

2. Installation complexity: While the kit includes all the necessary parts, the installation process can still be complex. It may require removing the transmission or transfer case, which can be a challenging task for those without extensive mechanical experience.

In conclusion, buying a National SX-XQ99 shaft seal kit for your 1975-1978 GMC C25 Suburban manual transmission vehicle can be a worthwhile investment for those experiencing leaks or damage to their existing seals. The reliability, convenience, and potential cost savings make it an attractive option. However, the upfront cost and installation complexity are important factors to consider.

If you have the necessary mechanical skills and are comfortable with the installation process, the benefits of a complete kit may outweigh the downsides. Alternatively, if you're unsure about your mechanical abilities or prefer to have a professional handle the installation, the cost of the kit may be a significant investment. Ultimately, the decision comes down to your budget, experience level, and the severity of the issue with your current seals.

Details:

National Output Shaft Seal Kit for 1975-1978 GMC C25 Suburban Manual br: Status: In Stock.

part #: sxxq99 prices

  • $17.63-$36.03

specifications manutransmission:

  • for models: C25, Suburban
  • for makes: Gmc
  • for years: 1975-1978
  • brand: National
  • mpn: Sx-xq99
  • type: Manual Transmission Output Shaft Seal Kit
  • manufacturer warranty: 1 Year
  • ipn: C409 56-21
  • item length: 2.750
  • placement on vehicle: Transmission Gaskets Sealing Systems
  • compatible model: C25 Suburban
  • compatible year: 1978 1977 1976 1975
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement
  • bundle description: 1 Pc Genuine National Manual Transmission Output Shaft Seal Kit

payments manutransmission:

  • wallet: Google-pay
  • credit card: Discover
  • other

general manutransmission:

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

seller manutransmission:

  • rating: 99.6%
  • # reviews: 646965
  • city: Indianapolis, Indiana

offer manutransmission:

  • options: Ship-to-home
  • started: April 18, 2026
  • sold: 0
  • quantity: 3
  • availability: In Stock

shipping manutransmission:

  • transit: 4-7 Days
  • cost: $0.00
  • service: Standard, Expedited
  • type: Fixed
  • class: Standard, Expedited

returns manutransmission:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller
for models: c25, suburban, for makes: gmc, for years: 1975-1978, type: manual transmission output shaft seal kit, manufacturer warranty: 1 year, item length: 2.750, placement on vehicle: transmission gaskets sealing systems, compatible model: c25 suburban, compatible year: 1978 1977 1976 1975, core charge: free no core charge, fitment type: direct replacement, bundle description: 1 pc genuine national manual transmission output shaft seal kit,
category: auto parts > car truck parts accessories > transmission drivetrain > manual transmission parts, sku: 12376491314988603,

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