National 710557 Automatic Transmission Oil Pump Seal - Front

Overview of National 710557 Automatic Transmission Oil Pump Seal

The National 710557 automatic transmission oil pump seal is engineered to provide reliable sealing performance for various Chrysler, Dodge, Jeep, Mitsubishi, and Ram vehicles. Designed with durable nitrile material and a clockwise-spiral lip design, this seal ensures effective oil retention and protection against leaks.

• Inside diameter: 1.875 inches (47.630 mm)
• Outside diameter: 2.633 inches (66.890 mm)
• Flanged outside diameter: 2.957 inches (75.110 mm)
• Thickness/width: 0.415 inches (10.540 mm)
• Sealing material: Nitrile rubber for resistance to heat and wear
• Helix type: Clockwise-spiral lip design for enhanced sealing
• Compatible with housing bore diameter of 2.622 inches (66.590 mm)

Detailed Product Description

The National 710557 oil pump seal is part of the 710500 series, specifically designed for automatic transmission applications. Constructed from nitrile, a material known for its resistance to oil, heat, and abrasion, this seal maintains integrity under demanding operating conditions. The clockwise-spiral lip design improves sealing efficiency by directing fluid back into the pump, reducing leakage and contamination risks. With precise dimensions including a 1.875-inch shaft diameter and a 2.633-inch outside diameter, this seal fits securely within the transmission housing bore of 2.622 inches, ensuring a tight and reliable fit.

Compatible Vehicles and Applications

This automatic transmission oil pump seal is compatible with a range of vehicles including Chrysler 1500 Classic, Dodge Ram 1500, 2500, and 3500 models, Jeep Grand Cherokee, Liberty, Commander, and Durango, as well as Mitsubishi Raider and Ram trucks. The part number 710557 is specifically suited for these models, providing a direct replacement for worn or damaged seals in the transmission oil pump assembly.

Common Issues Addressed by the 710557 Oil Pump Seal

• Prevents automatic transmission fluid leaks around the oil pump shaft
• Reduces risk of transmission overheating due to fluid loss
• Minimizes contamination ingress into the transmission system
• Helps maintain proper hydraulic pressure within the transmission
• Prevents premature wear of transmission components caused by fluid leakage

Installation Notes and Tips

• Ensure the transmission housing bore and shaft are clean and free of debris before installation
• Lubricate the seal lip with clean transmission fluid to ease installation and prevent damage
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing
• Inspect the shaft for wear or damage that could compromise the seal’s effectiveness

Quality Assurance and Warranty

National’s 710557 oil pump seal is manufactured to meet OEM specifications for fit, form, and function. Made from high-quality nitrile material, it offers durability and resistance to common transmission fluids and operating temperatures. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship, ensuring confidence in the product’s reliability.