National 710557 Automatic Transmission Oil Pump Seal - Front

Automatic Transmission Oil Pump Seal for Chrysler Applications

National 710557 is an automatic transmission oil pump seal built for front-position applications across a wide range of Ram, Dodge, Jeep, Chrysler, and Mitsubishi vehicles. It uses a nitrile sealing material and a clockwise-spiral lip design to help maintain a tight seal at the pump area where transmission fluid control is critical.

With OE-style dimensions and coverage for Chrysler 45RFE, 65RFE, and 68RFE transmission applications, this seal is a direct-fit service part for many Ram 1500, Ram 2500, Ram 3500, Dodge Durango, and Jeep Grand Cherokee repairs. National 710557 is also cross-referenced with ATP TO-72 and Gates 18761 for the same application.

Key Features

• Part number: National 710557
• Automatic transmission oil pump seal / oil seal
• Nitrile sealing material for fluid resistance
• Clockwise-spiral lip design
• Inside diameter: 1.875 in. (47.630 mm)
• Outside diameter: 2.633 in. (66.890 mm)
• Flanged outside diameter: 2.957 in. (75.110 mm)
• Width: 0.415 in. (10.540 mm)
• Housing bore: 2.622 in. (66.590 mm)
• Fits front-position applications

Detailed Description

National 710557 is engineered as a front automatic transmission oil pump seal for vehicles using Chrysler 45RFE, 65RFE, and 68RFE transmissions. The nitrile sealing material and spiral-lip profile are designed to maintain sealing contact at the pump interface, helping preserve transmission fluid containment under normal operating conditions. This makes it a practical replacement for service work on Ram 1500, Ram 2500, Ram 3500, Dodge Durango, Jeep Grand Cherokee, and related platforms.

National has supplied sealing solutions for more than 75 years, and this part reflects that focus on dimensional accuracy and application coverage. If you are servicing a 2011-2019 Ram 2500 front seal, a 2012-2013 Dodge Durango with Chrysler 65RFE transmission, or a 1999-2000 Jeep Grand Cherokee with Chrysler 45RFE transmission, National 710557 is listed for those applications.

What This Part Helps Address

• Transmission fluid leakage at the oil pump seal area
• Fluid seepage during front pump service
• Seal wear from age, heat, and fluid exposure
• Loss of sealing integrity in Chrysler 45RFE, 65RFE, or 68RFE applications
• Front transmission service on Ram, Dodge, Jeep, Chrysler, and Mitsubishi models

Installation Notes and Tips

Verify shaft, housing bore, and seal dimensions before installation. National 710557 measures 1.875 in. inside diameter, 2.633 in. outside diameter, and 0.415 in. width, so proper seating in the pump bore is important for a reliable seal. Clean the sealing surface thoroughly, inspect the shaft for wear or scoring, and confirm the transmission type before installation.

For fitment, this part is listed for front applications on vehicles such as 2011-2019 Ram 2500, 2011-2019 Ram 3500, 2011-2018 Ram 1500, 2012-2013 Dodge Durango with Chrysler 65RFE transmission, and 1999-2000 Jeep Grand Cherokee with Chrysler 45RFE transmission.

Quality Assurance

National is a long-established sealing brand with a history of supplying premium sealing solutions and keeping pace with modern vehicle requirements. Part number 710557 is built to OE-style dimensional standards for the listed applications and is backed by National’s sealing expertise.