National 710989 Drive Axle Shaft Seal - Front

National 710989 Drive Axle Shaft Seal

National 710989 is a metric drive axle shaft seal built for front differential service on select Ram trucks. It uses a polyacrylate sealing material and a bi-directional lip design to help maintain a consistent seal at the axle shaft interface.

Compatible With 2012-2019 Ram 1500 front and 2019 Ram 1500 Classic front with an 8.5-inch ring gear and ZF 215FD differential. This National axle shaft seal is also cross-referenced to SKF 14815A for the same application.

Key Features

• Part number: 710989
• Drive axle shaft seal / oil seal for front differential use
• Polyacrylate sealing material
• Bi-directional lip design
• Metric dimensions for precise housing and shaft fit
• Outside diameter: 75.200 mm (2.961 in)
• Inside diameter: 38.000 mm (1.496 in)
• Width: 8.000 mm (0.315 in)
• Overall width with side lip: 13.000 mm (0.512 in)

Detailed Description

National 710989 is an axle shaft oil seal engineered for driveline sealing at the front differential. The seal measures 38.000 mm inside diameter, 75.200 mm outside diameter, and 8.000 mm width, with a 75.000 mm housing bore and a 13.000 mm overall width with side lip. Its bi-directional lip design supports sealing performance at the shaft interface, while the polyacrylate material is selected for demanding driveline conditions. This part number 710989 is a direct fit for 2012-2019 Ram 1500 front applications and 2019 Ram 1500 Classic front applications with an 8.5-inch ring gear and ZF 215FD differential.

What It Helps Address

• Front differential fluid seepage at the axle shaft
• Oil leakage around the shaft seal area
• Contamination entering the differential through a worn seal
• Seal wear from age, heat, and driveline movement
• Service replacement for a damaged axle shaft oil seal

Installation Notes and Tips

Verify the differential configuration before installation: 8.5-inch ring gear with ZF 215FD differential. Match the shaft and housing dimensions to the original seal, and inspect the sealing surface for grooves, corrosion, or debris before pressing the new seal into place. Clean the bore thoroughly and install the seal squarely to avoid distortion. For Ram 1500 and Ram 1500 Classic front axle service, confirm the application by year, model, and differential specification before final assembly.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing products for modern vehicle applications. Part number 710989 reflects that focus on dimensional accuracy and driveline sealing performance for select Ram front axle service.