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National 8622 Differential Pinion Seal - Front OuterOE Quality 60-Day Returns
Part #: 8622

National 8622 Differential Pinion Seal - Front Outer

Front Outer
126 vehicles fit this part
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Fitment: Chevrolet and GMC, Blazer, Jimmy, K10, K10 Suburban, K1500, K1500 Suburban, K20, K20 Suburban, K2500, K2500 Suburban, K5 Blazer, V10, V10 Suburban, V1500, V1500 Suburban, V20, V20 Suburban, V2500, and V2500 Suburban
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National 8622 Differential Pinion Seal

The National 8622 differential pinion seal is an OE-style oil seal for the front outer position on select Chevrolet and GMC 4x4 applications. Built with nitrile sealing material and Redicoat protection, it is sized for the shaft, housing bore, and flange dimensions needed for a precise driveline seal.

Key Features

  • Part number: 8622
  • Part type: differential pinion seal / oil seal
  • Material: nitrile
  • Redicoat: yes
  • Series: 8000
  • Type: 88
  • Inside diameter: 1.940 in. / 49.280 mm
  • Outside diameter: 2.817 in. / 71.550 mm
  • Flanged outside diameter: 3.070 in. / 77.978 mm
  • Housing bore: 2.813 in. / 71.450 mm
  • Thickness / width: 0.428 in. / 10.870 mm

Product Details

National has supplied sealing solutions for more than 75 years, and the 8622 pinion seal reflects that focus on dimensional accuracy and drivetrain sealing performance. This seal is specified for front outer applications on 1977-1991 Chevrolet Blazer, 1977-1991 GMC Jimmy, 1977-1986 Chevrolet K10, 1977-1986 Chevrolet K20, 1977-1986 Chevrolet K5 Blazer, 1979-1986 GMC K1500, 1979-1986 GMC K2500, 1987-1991 Chevrolet V1500 Suburban, 1989-1991 Chevrolet V2500 Suburban, and related GMC V-series and K-series trucks with the listed axle and transmission notes. The National 8622 is also cross-referenced to Davico Mfg 19277 for the same application.

Common Uses

  • Stops gear oil leakage at the differential pinion area
  • Addresses wetness around the front outer axle seal location
  • Helps correct seepage caused by worn or hardened seal material
  • Supports repair of driveline fluid loss on older Chevrolet and GMC 4x4 vehicles
  • Restores sealing at the pinion shaft interface after service work

Installation Notes

Verify shaft diameter, housing bore, and seal orientation before installation. Clean the bore and sealing surface thoroughly, and inspect the pinion yoke or shaft for wear, grooves, or corrosion that could affect sealing. Confirm vehicle configuration, including the 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing notes listed in the fitment data for Chevrolet Blazer, GMC Jimmy, and other covered models.

Quality Assurance

National is known for premium sealing products and long-term industry experience in automotive sealing systems. The 8622 is built as a nitrile oil seal with Redicoat protection for dependable fit and sealing consistency in the specified applications.

BrandNational
Part Number8622
Inside Diameter1.940
Inside Diameter49.280
Thickness0.428
Thickness10.870
Outside Diameter2.817
Outside Diameter71.550
Flanged Outside Diameter (Inch)3.070
Flanged Outside Diameter (MM)77.978
Housing Bore (Inch)2.813
Housing Bore (MM)71.450
MaterialNitrile
Outside Diameter (Inch)2.817
Outside Diameter (mm)71.550
Part DescriptionOil seal
RedicoatYes
Series8000
Shaft (Inch)1.940
Shaft (MM)49.280
Type88
Unit of DimensionInch
Width (Inch)0.428
Width (mm)10.870

This part fits 126 vehicles. Search below:

YearMakeModelDrive TypePositionNotes
1991ChevroletBlazerFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1991ChevroletV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1991ChevroletV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1991GMCJimmyFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1991GMCV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1991GMCV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1990ChevroletBlazerFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1990ChevroletV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1990ChevroletV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1990GMCJimmyFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1990GMCV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1990GMCV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1989ChevroletBlazerFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1989ChevroletV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1989ChevroletV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1989GMCJimmyFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1989GMCV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1989GMCV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1988ChevroletBlazerFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1988ChevroletV10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1988ChevroletV20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1988GMCJimmyFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1988GMCV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1988GMCV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987ChevroletBlazerFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987ChevroletV10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987ChevroletV10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987ChevroletV20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987ChevroletV20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987GMCJimmyFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987GMCV1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987GMCV1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987GMCV2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1987GMCV2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986ChevroletK5 BlazerFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986GMCJimmyFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1986GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985ChevroletK5 BlazerFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985GMCJimmyFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1985GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1984GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1983GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1982GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1981GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1980GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979GMCK1500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979GMCK1500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979GMCK2500Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1979GMCK2500 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1978ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1978ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1978ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1978ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1978ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1978GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1977ChevroletK10Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1977ChevroletK10 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1977ChevroletK20Front OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1977ChevroletK20 SuburbanFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1977ChevroletK5 Blazer4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.
1977GMCJimmy4WDFront OuterFits vehicles with 8.5-inch ring gear, GMC axle, and manual transmission input shaft bearing.

* 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:

19277458858458859476248622

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