Description
Product Overview
The National 472705 transmission shift shaft seal is engineered for precision and durability in manual gearbox applications. Constructed from high‑quality nitrile rubber, the seal offers exceptional resistance to swelling when exposed to hydrocarbon fluids. Its spring‑loaded, multi‑lip design ensures a tight, leak‑free fit across a wide temperature range, from –40°F to 225°F, delivering consistent performance in both cold starts and high‑heat conditions. Compact dimensions (2 x 0.6 x 2 inches) and a lightweight profile (0.32 ounces) make installation straightforward, while the robust material selection guarantees long‑term reliability.
Usage
This seal is ideal for professional mechanics, automotive repair shops, and DIY enthusiasts working on manual transmission rebuilds or maintenance. It excels in environments where low‑temperature flexibility and resistance to fluid‑induced swelling are critical, such as cold‑climate service bays or high‑performance tuning shops. Whether replacing worn seals during a transmission overhaul or performing routine maintenance, the National 472705 provides a dependable barrier against fluid leaks and contamination.
Why Choose Us
National brings decades of automotive expertise, ensuring each seal meets rigorous quality standards. The nitrile composition delivers superior chemical resistance compared to standard elastomers, reducing the risk of premature failure. Our spring‑loaded mechanism compensates for minor shaft tolerances, guaranteeing a snug seal without the need for additional adjustments. Backed by a solid reputation and positive customer reviews, this product offers peace of mind for every repair job.
Key Features
- Spring‑loaded, multi‑lip design for a secure, leak‑free fit
- Durable nitrile rubber resists swelling in hydrocarbon fluids
- Operates reliably from –40°F to 225°F, ensuring low‑temp flexibility
- Compact size and lightweight for easy installation
- Manufactured by National, a trusted name in automotive components
FAQ
What vehicles is the 472705 seal compatible with?
The seal is designed for a range of manual transmissions that use standard shift shaft dimensions. Refer to your vehicle’s service manual or contact our support team with the make and model for specific compatibility.
Can this seal be used in high‑performance applications?
Yes. The nitrile material and spring‑loaded design provide the durability and temperature tolerance required for performance tuning and racing environments.
How do I install the seal correctly?
Ensure the shaft is clean and free of debris, apply a light coat of compatible transmission fluid to the seal lip, and gently press the seal onto the shaft until the spring mechanism seats fully.
Is the seal reusable after removal?
While the seal is made from resilient nitrile, it is recommended to replace it after removal to maintain optimal sealing performance and avoid potential leaks.
What warranty does National offer on this seal?
National provides a limited warranty covering manufacturing defects for a period of one year from the date of purchase.
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