National 710473 Engine Crankshaft Seal - Rear

National 710473 Rear Engine Crankshaft Seal

National 710473 is a rear engine crankshaft seal built for applications that require a precise sealing surface and stable fit at the housing bore. It is listed for rear fitment on Ram 2500 and Ram 3500 models, including Dodge Ram 2500 and Dodge Ram 3500 applications across the confirmed year range.

Key Features

• PTFE sealing material for low-friction crankshaft sealing performance
• Inside diameter: 5.039 in. / 128.000 mm
• Outside diameter: 5.925 in. / 150.500 mm
• Housing bore: 5.920 in. / 150.370 mm
• Width: 0.850 in. / 21.600 mm
• Part description: oil seal, Type 32
• Series: 710400

Detailed Description

This National crankshaft seal is engineered around the listed dimensions to support a proper seal at the rear of the engine. The PTFE construction is selected for sealing applications where consistent contact and dimensional accuracy matter, and the seal is specified with a 5.039-inch shaft diameter and 5.925-inch outside diameter for the intended housing bore. National has supplied sealing products for decades, and this part reflects that focus on OE-style sealing solutions for modern and older truck applications. This part cross-references SKF 51172 for the same application.

Compatible With rear applications on Ram 2500 and Ram 3500 models, including 2011-2019 Ram 2500 rear, 2011-2019 Ram 3500 rear, 1998-2010 Dodge Ram 2500 rear, and 1998-2010 Dodge Ram 3500 rear. National 710473 is a direct-fit style option for buyers searching for a rear crankshaft seal for Ram truck engine sealing service.

What It Helps Address

• Rear main seal oil leakage at the crankshaft area
• Oil seepage from a worn or hardened sealing lip
• Loss of sealing integrity from age, heat, or mileage
• Fitment issues caused by incorrect seal dimensions
• Service replacement needs on Ram 2500 and Ram 3500 rear engine applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation to confirm the seal matches the engine application. Inspect the crankshaft sealing surface for wear, scoring, or contamination before fitting the new seal. Clean the housing and surrounding area thoroughly, and follow the vehicle service procedure for rear crankshaft seal replacement on the specific Ram or Dodge Ram model.

Quality Assurance

National is known for sealing products and has supported the aftermarket for more than 75 years. The 710473 is part of that sealing-focused lineup and is built to meet the dimensional requirements listed for the application.