SX-WT90 NATIONAL Transmission Shaft Seal Manual Wn R3500

Review NATIONAL Transmission Input Shaft Seal For Chevrolet Manual Wn for CHEVROLET R3500 1989–1991

The National SX-WT90 transmission shaft seal is a crucial component for maintaining the efficiency and longevity of the manual transmission system in select 1989-1991 Chevrolet R3500 models. This seal is specifically designed to prevent the transmission fluid from leaking out of the shaft, ensuring a secure and airtight connection between the transmission housing and the shaft.

The SX-WT90 transmission shaft seal is made of high-quality materials that provide excellent sealing performance and resistance to wear and tear. It features a special elastomeric compound that offers superior flexibility and durability, allowing it to effectively seal the shaft even under the most demanding driving conditions. The seal also includes a robust metal garter that provides additional support and helps maintain its shape, ensuring a perfect fit and a leak-free transmission.

This transmission shaft seal is an essential replacement part for vehicles that have experienced leaks or have worn-out seals. Installing a new SX-WT90 seal can help prevent costly transmission repairs or replacements by addressing the issue at its source. It is also recommended as a preventive maintenance measure for older vehicles to ensure the transmission system continues to perform optimally.

The National SX-WT90 transmission shaft seal comes in a package that includes the seal itself, along with detailed instructions for installation. The installation process is generally straightforward and can be completed by most do-it-yourself mechanics with common hand tools. However, it is important to note that the transmission must be drained and the vehicle lifted to access the shaft seal.

Overall, the National SX-WT90 transmission shaft seal is an essential component for maintaining the performance and longevity of the manual transmission system in 1989-1991 Chevrolet R3500 models. Its high-quality materials, superior sealing performance, and robust design make it an excellent choice for both repair and preventive maintenance applications.

Pros and Cons of Buying a National SX-WT90 Transmission Shaft Seal for 1989-1991 Chevrolet R3500 Manual WN

a. Designed specifically for 1989-1991 Chevrolet R3500 manual WN transmission shafts.

b. Manufactured using high-quality materials for better durability and longevity.

c. May prevent costly transmission repairs by addressing the issue of leaking shaft seals.

d. Relatively easy to install, saving time and potential labor costs.

a. Replacing the transmission shaft seal is a common issue for older vehicles, so the part may need to be replaced more than once over the vehicle's lifetime.

b. Some customers have reported receiving damaged or incorrect seals, which may require ordering a replacement or contacting the manufacturer for assistance.

c. The cost of the seal may be higher than some aftermarket alternatives, which could be a concern for budget-conscious consumers.

The decision to buy a National SX-WT90 Transmission Shaft Seal for a 1989-1991 Chevrolet R3500 manual WN ultimately depends on the individual's priorities and circumstances. For those who value the peace of mind that comes with using an OEM (Original Equipment Manufacturer) part, this seal may be an attractive option. However, for those who are budget-conscious and do not mind the potential risk of using an aftermarket seal, there may be more affordable alternatives available. Ultimately, it is essential to consider the potential benefits and drawbacks before making a purchasing decision.

Based on the available information, it is recommended to consider the following factors when deciding whether to buy a National SX-WT90 Transmission Shaft Seal:

a. The importance of using an OEM part versus an aftermarket alternative.

b. The overall cost, including both the part price and the potential labor costs if professional installation is required.

c. The availability and reliability of alternative seals from other manufacturers.

d. The urgency of the repair, as a leaking seal can cause further damage to the transmission if left unaddressed.

By carefully considering these factors, individuals can make an informed decision that best meets their specific needs and budget.

Details:

National transmission input shaft seal for 1989 - 1991 Chevrolet R3500 manual wn: status: in stock.

specifications differentialsdepo:

• for models: R3500
• for makes: Chevrolet
• for years: 1989–1991
• brand: National
• mpn: Sx-wt90
• placement on vehicle: Transmission Gaskets Sealing Systems
• type: Manual Transmission Input Shaft Seal
• item length: 2.750
• manufacturer warranty: 1 Year
• ipn: C396 42-52
• compatible year: 1991 1990 1989
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine National Manual Transmission Input Shaft Seal

offer differentialsdepo:

• availability: in stock
• in stock #: 2
• sold #: 8
• started: april 4, 2026
• options: ship-to-home
• prices: $15.70–$74.68
• item condition: New

returns differentialsdepo:

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

shipping differentialsdepo:

• service: standard, expedited
• type: fixed
• class: standard, expedited
• transit: 4-7 days

payments differentialsdepo:

• other
• wallet: paypal
• credit card: mastercard

general differentialsdepo:

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

seller differentialsdepo:

• rating: 99.6%
• city: indianapolis, indiana
• # reviews: 641372