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National 450185 Transfer Case Output Shaft Seal - Front or Rear RearwardOE Quality 60-Day Returns
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Part #: 450185

National 450185 Transfer Case Output Shaft Seal - Front or Rear Rearward

Rear Rearward
⚙️ 69 vehicles fit this part
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🚗Fitment: Ford, Chevrolet, GMC, International, and Jeep, Bronco, F-100, Blazer, K10 Pickup, K10 Suburban, K20 Pickup, K20 Suburban, K30 Pickup, Jimmy, K15/K1500 Pickup, K15/K1500 Suburban, K25/K2500 Pickup, K25/K2500 Suburban, K35/K3500 Pickup, Scout II, CJ5, CJ6, Commando, J-100, J-2500, J-2600, J-4500, J-4600, J-4700, J-4800, Wagoneer, J-3800, Jeepster, Scout, J-2700, J-3500, J-3600, J-3700, Gladiator, J-2800, F-134, Truck, 6-230, J-200, J-210, J-220, J-230, J-300, J-310, J-320, J-330, Tornado, 6-226, FJ3, FJ3A, Utility Wagon, F4-134, Utility, F4, FA-134, and Willys
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National Transfer Case Output Shaft Seal Overview

The National 450185 transfer case output shaft seal is engineered to provide reliable sealing performance for select Chevrolet, Ford, GMC, and Jeep vehicles. Designed with durable nitrile material and precise dimensions, this oil seal helps maintain transfer case integrity by preventing fluid leaks and contamination.

  • Inside diameter: 1.562 inches (39.670 mm)
  • Outside diameter: 2.506 inches (63.650 mm)
  • Thickness/width: 0.500 inches (12.700 mm)
  • Sealing material: Nitrile for resistance to oil and wear
  • Redicoat coating for enhanced corrosion protection
  • Compatible with transfer case output shafts of 1.562 inches diameter

Detailed Product Description

The National 450185 transfer case output shaft seal is part of the 450000 series, designed specifically for transfer case applications requiring a robust oil seal. Constructed from nitrile, this seal offers excellent resistance to petroleum-based fluids and maintains flexibility under varying temperatures. The seal’s precise inside diameter of 1.562 inches and outside diameter of 2.506 inches ensure a secure fit within the housing bore, which measures approximately 2.502 inches (63.550 mm). The 0.500-inch thickness provides a reliable barrier against fluid leakage, helping to protect the transfer case components from dirt and moisture intrusion.

Compatible Vehicles and Applications

This transfer case output shaft seal is compatible with a range of popular models, including Chevrolet Blazer, Ford Bronco, Jeep CJ5, Ford F-100, GMC Jimmy, Chevrolet K10 Suburban, GMC K20 Suburban, and Jeep Wagoneer. The part number 450185 is specifically designed to meet the sealing requirements of these vehicles’ transfer cases, ensuring proper fitment and function.

Common Issues Addressed by This Seal

  • Prevents transfer case fluid leaks that can lead to low fluid levels
  • Protects transfer case internals from dirt and debris contamination
  • Reduces risk of premature transfer case wear due to fluid loss
  • Maintains proper lubrication of output shaft components
  • Helps avoid costly transfer case repairs caused by seal failure

Installation Notes and Tips

  • Ensure the transfer case output shaft and housing bore are clean and free of debris before installation
  • Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip
  • Verify the seal orientation matches the original part to maintain proper sealing function
  • Check shaft diameter compatibility (1.562 inches) prior to installation
  • Inspect the seal for any damage or defects before installation

Quality Assurance and Warranty

National transfer case output shaft seals are manufactured to meet industry standards for durability and performance. The nitrile material and Redicoat corrosion protection contribute to the seal’s longevity in demanding automotive environments. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the 450185 part number.

BrandNational
Part Number450185
Housing Bore (Inch)2.502
Housing Bore (MM)63.550
Inside Diameter1.562
Inside Diameter39.670
MaterialNitrile
Outside Diameter2.506
Outside Diameter63.650
Outside Diameter (Inch)2.506
Outside Diameter (mm)63.650
Part DescriptionOil Seal
RedicoatYes
Sealing MaterialNitrile
Series450000
Shaft (Inch)1.562
Shaft (MM)39.670
Thickness0.500
Thickness12.700
Type45
Unit of DimensionInch
Width (Inch)0.500
Width (mm)12.700

This part fits 69 vehicles. Search below:

YearMakeModelDrive TypePositionNotes
1976FordBronco4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1976FordF-1004WDFrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1975FordBronco4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1975FordF-1004WDFrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1974ChevroletBlazer4WDFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974ChevroletBlazer4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974ChevroletK10 SuburbanRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974ChevroletK10 SuburbanFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974ChevroletK20 SuburbanRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974ChevroletK20 SuburbanFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974FordF-1004WDFrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1974GMCJimmy4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1974GMCJimmy4WDFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973ChevroletBlazer4WDFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973ChevroletBlazer4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973ChevroletK10 SuburbanRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973ChevroletK10 SuburbanFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973ChevroletK20 SuburbanRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973ChevroletK20 SuburbanFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973FordF-1004WDFrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1973GMCJimmy4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1973GMCJimmy4WDFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1972ChevroletBlazer4WDFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1972ChevroletBlazer4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1972FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1972FordBroncoFront1st Design; with 0.5 (in) Width; with Spicer 20 Transfer Case; with Part Time 4WD; 2.506 (in) Outside Diameter; 2 Speed
1972FordF-1004WDFrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1972JeepCJ5Rear Rearward1st Design; with 0.5 (in) Width; with Spicer 20 Transfer Case; with Part Time 4WD; 2.506 (in) Outside Diameter; 2 Speed
1972JeepCJ5Front1st Design; with 0.5 (in) Width; with Spicer 20 Transfer Case; with Part Time 4WD; 2.506 (in) Outside Diameter; 2 Speed
1972JeepWagoneerFront1st Design; with 0.5 (in) Width; with Spicer 20 Transfer Case; with Part Time 4WD; 2.506 (in) Outside Diameter; 2 Speed
1972JeepWagoneerRear Rearward1st Design; with 0.5 (in) Width; with Spicer 20 Transfer Case; with Part Time 4WD; 2.506 (in) Outside Diameter; 2 Speed
1971FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1971FordBroncoFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1971FordF-1004WDFrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1971JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1971JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1970FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1970FordBroncoFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1970FordF-1004WDFrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1970JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1970JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1969FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1969FordBroncoFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1969FordF-100FrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1969JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1969JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1968FordBronco4WDFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1968FordBronco4WDRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1968FordF-100FrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1968JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1968JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1967FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1967FordBroncoFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1967FordF-100FrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1967JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1967JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1966FordBroncoRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1966FordBroncoFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1966FordF-100FrontFull Time 4WD; with Spicer 21 Axle; 1 Speed
1966JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1966JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1965JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1965JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1964JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1964JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1963JeepWagoneerRear RearwardFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.
1963JeepWagoneerFrontFits Spicer 20 Transfer Case with Part Time 4WD and 2 Speed configuration.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

0704-F775101181114109118250143620156351650351940541CA60536209557M121470628P8629314529837397573140638450185493724M9149502276503915M97376043260536624632624632-57849118123077830128B8925A-1805-Q-199A1805Q-199A60536AL2095TC6TZ7B215ADD16B16GP7770AJ2110J8123077M417TDN128P24149T1423T9455

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.