National Drive Axle Shaft Seal for Ford F-150 710950 — Spring-Loaded Multi-Lip, High-Temp Durable

The National 710950 is a spring-loaded, multi-lip drive axle shaft seal engineered to keep axle housings leak-free on compatible Ford and Lincoln trucks and SUVs.

Built by National, a sealing specialist with over seven decades in the industry, this axle shaft seal replaces worn or damaged seals to restore proper fluid containment and protect bearings and axle components. It is engineered for robust temperature tolerance and broad fluid compatibility so it fits into demanding vehicle service applications where longevity and reliability matter.

Which vehicles will this axle shaft seal fit?

This seal fits a range of Ford and Lincoln models across multiple years, including passenger trucks and SUVs. Always verify fitment with your vehicle year, make, model, engine, and trim before ordering.

• Ford F-150: 2009–2018 (including 2010–2012 noted trims)
• Ford Expedition and Lincoln Navigator: 2007–2018
• Ford Explorer and Explorer Sport Trac: 2006–2010 (Explorer Sport Trac 2007–2010)
• Ford Mustang: select 2015–2018 applications

How does the spring-loaded, multi-lip design help in real use?

The spring-loaded, multi-lip construction maintains consistent contact pressure on the shaft to resist leaks as components wear and move. Multiple sealing lips create redundant barriers, reducing the chance of fluid escape and contamination entry under varied operating conditions.

• Spring energizer keeps lip tension over time
• Multiple lips provide staged sealing against leaks
• Durable elastomer resists hardening and cracking

What operating conditions and fluids is this seal compatible with?

National designed this seal to perform across a wide temperature span and with many automotive fluids found in axle and differential assemblies. It handles high-temperature exposure and typical gear oils encountered in driveline systems.

• Temperature range: -40°F to 400°F (-40°C to 204°C)
• Engineered for compatibility with common gear and axle lubricants
• Suitable for heavy-duty and everyday driving environments

How should I confirm fitment and install this part?

Before buying, compare the part number, vehicle details, and any fitment notes from your supplier. Installation typically requires axle removal and careful seating of the seal to avoid lip damage; use appropriate tools and follow vehicle service procedures.

• Check vehicle year, make, model, engine and trim for compatibility
• Inspect shaft and bore for wear before installing new seal
• Seat seal squarely and avoid deforming the sealing lips

Who is this for: The National 710950 axle shaft seal is intended for technicians, DIY mechanics, and fleet maintainers replacing worn or leaking axle seals on compatible Ford and Lincoln trucks and SUVs. If you need a durable, high-temperature-capable replacement that works with common axle fluids and restores effective sealing to driveline assemblies, this part is engineered to meet those repair needs. Always confirm exact fitment with vehicle information and follow recommended installation practices to ensure long-term performance.