Description
Product Overview
The National Transfer Case Output Shaft Seal is engineered for durability and performance. Featuring a spring loaded, multilip design, it operates reliably from -40°F to 400°F and works with a broad spectrum of automotive fluids. Weighing just 5.5 ounces and measuring 4.8 x 2.3 x 4.8 inches, this machined exterior seal fits the center position of the transfer case output shaft, matching the OEM part number 710943.
Usage
Designed for professional mechanics and experienced DIYers, this seal is perfect for repairing transfer cases in trucks, SUVs, and off‑road vehicles. Its robust construction handles high‑temperature environments and heavy‑duty fluid exposure, making it suitable for both routine maintenance and emergency fixes. 
Why Choose Us
National delivers automotive components that meet strict quality standards. This seal undergoes rigorous testing to ensure leak‑free performance and long‑lasting reliability. Backed by a solid reputation and a 5‑star customer rating, it offers peace of mind for every repair job.
Key Features
- Spring loaded multilip design for superior sealing
- Temperature range from -40°F to 400°F
- Compatible with a wide variety of automotive fluids
- Precision machined exterior for exact fit
- Lightweight yet durable construction for easy handling
FAQ
What vehicles is this seal compatible with?
The seal fits most trucks and SUVs that use a standard transfer case output shaft, matching the OEM part number 710943.
Can this seal be used with synthetic fluids?
Yes, its material composition is compatible with both conventional and synthetic transmission fluids.
How does the spring loaded design improve performance?
The spring maintains constant pressure on the shaft, adapting to thermal expansion and preventing leaks under varying temperatures.
Is installation tool‑free?
While the seal can be installed by hand, using a seal installer tool ensures a perfect fit and reduces the risk of damage.
What is the warranty period?
National offers a one‑year limited warranty covering manufacturing defects.
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