National 471424 Transfer Case Power Take Off (PTO) Shaft Seal - Front

Overview of National Transfer Case PTO Shaft Seal 471424

The National Transfer Case Power Take Off (PTO) Shaft Seal, part number 471424, is designed for reliable sealing in transfer cases of select Buick, Cadillac, Chevrolet, Dodge, GMC, Oldsmobile, and Pontiac vehicles. Engineered with nitrile material and Redicoat technology, this oil seal ensures effective protection against leaks and contamination.

• Inside diameter options: 2.000 inches (50.8 mm)
• Outside diameter: 2.627 inches (66.73 mm)
• Thickness/width: 0.312 inches (7.92 mm)
• Sealing material: durable nitrile rubber
• Compatible with housing bore of 2.623 inches (66.62 mm)
• Redicoat coating for enhanced wear resistance
• Zero duplication part ensuring unique fit and quality

Technical Details and Specifications

This National transfer case PTO shaft seal is part of the 470000 series and is specifically designed to maintain a secure seal around the PTO shaft with a 2.000 inch (50.8 mm) diameter. The nitrile sealing material offers resistance to oil, heat, and wear, making it suitable for demanding automotive environments. The seal’s outside diameter of 2.627 inches (66.73 mm) matches the housing bore size closely at 2.623 inches (66.62 mm), ensuring a precise fit. The 0.312 inch (7.92 mm) thickness provides adequate sealing surface to prevent fluid leakage in transfer cases of various GM and Dodge models.

Compatible Vehicles and Applications

This PTO shaft seal is compatible with a range of vehicles including Buick 60 Special, Cadillac Allante, DeVille, Eldorado, Fleetwood, Seville, Chevrolet Blazer, K10, K20, K1500, K2500, K3500, Oldsmobile 98, Pontiac Grand Prix, Grand LeMans, Riviera, and Dodge D250, D350 commercial chassis models. It is designed to replace worn or damaged seals in transfer cases to maintain proper lubrication and prevent contamination.

• Prevents oil leaks from transfer case PTO shafts
• Eliminates contamination ingress that can cause premature wear
• Resolves issues related to noisy or rough PTO shaft operation
• Helps maintain transfer case fluid integrity
• Addresses seal failure due to age or damage

Installation Notes and Tips

When installing the National 471424 PTO shaft seal, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without distortion. Verify the shaft diameter matches the 2.000 inch specification for proper sealing. Lubricate the seal lip lightly with transfer case fluid before installation to reduce initial wear. Follow vehicle-specific service manual instructions for transfer case disassembly and reassembly to avoid damage.

Quality Assurance and Warranty

National’s transfer case PTO shaft seal 471424 is manufactured to meet OEM standards with nitrile material and Redicoat coating for durability. This zero duplication part is engineered for consistent fit and performance. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship, providing confidence in long-term reliability.