SKF 18994 Transfer Case Output Shaft Seal - Front or Rear
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SKF

SKF 18994 Transfer Case Output Shaft Seal - Front or Rear

Brand SKF 18994
Position Front and Rear
Width 0.469
Outside Diameter 2.757
Sealing Surface Type Polyacrylate
Shaft Diameter 1.886
Fits Chevrolet, GMC, and Oldsmobile · 154 vehicles

Precision seal design. Made with premium materials to keep lubricants in and contaminants out.

Polyacrylate sealing surface. Provides the right properties for demanding sealing applications.

Transfer case seal. Helps maintain a tight seal around the shaft.

Cross-references 15580225, 145818994 and 975918994 for the same application. See all 4.

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SKF Transfer Case Output Shaft Seal

SKF 18994 is a transfer case output shaft seal built for applications that need reliable fluid retention and contamination control. It is sized for the specified shaft and housing dimensions and uses a polyacrylate sealing surface for consistent contact in transfer case service.

Compatible with Chevrolet K3500, Chevrolet Astro, GMC Safari, Chevrolet Blazer, Chevrolet S10, GMC Jimmy, GMC Sonoma, Chevrolet S10 Blazer, Oldsmobile Bravada, and related GMC K3500 and V3500 transfer case applications listed below.

Key Features

  • Part number 18994 transfer case output shaft seal from SKF
  • Outside diameter: 2.757 in.
  • Shaft diameter: 1.886 in.
  • Width: 0.469 in.
  • Polyacrylate sealing surface type for transfer case sealing service
  • Designed for front, rear, and N/A listed positions where specified by application
  • This part cross-references 15580225 and 145818994 for the same application.

Detailed Description

SKF 18994 is engineered for transfer case output shaft sealing in a wide range of GM trucks and SUVs. It is listed for 1989-2000 Chevrolet and GMC applications, including Chevrolet K3500, Chevrolet Astro, GMC Safari, Chevrolet Blazer, Chevrolet S10, GMC Jimmy, GMC Sonoma, Chevrolet S10 Blazer, and Oldsmobile Bravada. The seal dimensions and polyacrylate sealing surface are specified to match the shaft and housing interface, helping maintain proper lubricant control in transfer case operation. SKF has a long history in seal design, and this part reflects that focus on precise materials and application-specific construction.

What It Is Used For

  • Stopping transfer case fluid seepage at the output shaft
  • Reducing contamination entry around the shaft seal area
  • Addressing leaks on Chevrolet K3500 and GMC K3500 transfer case service
  • Replacing worn seals on Chevrolet Astro, GMC Safari, and related GM 4x4 platforms
  • Restoring sealing performance after age-related hardening or wear

Installation Notes and Tips

Verify the transfer case model, shaft diameter, outside diameter, and listed position before installation. Clean the sealing bore and shaft surface thoroughly, and inspect for grooves, corrosion, or damage that could affect seal life. Confirm the application notes for Borg Warner 1370, 4401, 4470, or 4472 units where listed, since fitment varies by drivetrain configuration and chassis code.

Quality Assurance

SKF manufactures seals to defined specifications using premium materials and controlled production standards. The brand’s seal engineering background and long-term OE-style sealing focus support consistent fit and service life in transfer case applications.

This part fits 154 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypePositionNotes
2000ChevroletK3500—FrontBorg Warner 4470
2000ChevroletK3500—N/A—
2000GMCK3500—N/A—
1999ChevroletK3500—FrontBorg Warner 4470
1999ChevroletK3500—N/A—
1999GMCK3500—N/A—
1998ChevroletAstro—Front—
1998ChevroletK3500—FrontBorg Warner 4470
1998ChevroletK3500—N/A—
1998GMCK3500—N/A—
1998GMCSafari—Front—
1997ChevroletAstro—Front—
1997ChevroletBlazer—FrontBorg Warner 4472
1997ChevroletK3500—FrontBorg Warner 4470
1997ChevroletK3500—N/A—
1997ChevroletK3500—RearBorg Warner 4401
1997ChevroletK3500—RearBorg Warner 4470
1997ChevroletS10—FrontBorg Warner 4472
1997GMCJimmy—FrontBorg Warner 4472
1997GMCK3500—N/A—
1997GMCK3500—RearBorg Warner 4401
1997GMCK3500—RearBorg Warner 4470
1997GMCSafari—Front—
1997GMCSonoma—FrontBorg Warner 4472
1996ChevroletAstro—Front—
1996ChevroletBlazer—FrontBorg Warner 4472
1996ChevroletK3500—FrontBorg Warner 4470
1996ChevroletK3500—N/A—
1996ChevroletK3500—RearBorg Warner 4401
1996ChevroletK3500—RearBorg Warner 4470
1996ChevroletS10—FrontBorg Warner 4472
1996GMCJimmy—FrontBorg Warner 4472
1996GMCK3500—N/A—
1996GMCK3500—RearBorg Warner 4401
1996GMCK3500—RearBorg Warner 4470
1996GMCSafari—Front—
1996GMCSonoma—FrontBorg Warner 4472
1995ChevroletAstro—Front—
1995ChevroletBlazer—FrontBorg Warner 4472
1995ChevroletK3500—FrontBorg Warner 4470
1995ChevroletK3500—FrontBorg Warner 4401
1995ChevroletK3500—N/A—
1995ChevroletK3500—RearBorg Warner 4401
1995ChevroletK3500—RearBorg Warner 4470
1995ChevroletS10—FrontBorg Warner 4472
1995GMCJimmy—FrontBorg Warner 4472
1995GMCK3500—N/A—
1995GMCK3500—RearBorg Warner 4401
1995GMCK3500—RearBorg Warner 4470
1995GMCSafari—Front—
1995GMCSonoma—FrontBorg Warner 4472
1994ChevroletAstro—Front—
1994ChevroletK3500—FrontBorg Warner 4470
1994ChevroletK3500—FrontBorg Warner 4401
1994ChevroletK3500—N/A—
1994ChevroletK3500—RearBorg Warner 4401
1994ChevroletK3500—RearBorg Warner 4470
1994ChevroletS10—FrontBorg Warner 4472
1994ChevroletS10 Blazer—FrontBorg Warner 4472
1994GMCJimmy—FrontBorg Warner 4472
1994GMCK3500—N/A—
1994GMCK3500—RearBorg Warner 4401
1994GMCK3500—RearBorg Warner 4470
1994GMCSafari—Front—
1994GMCSonoma—FrontBorg Warner 4472
1994OldsmobileBravada—Front—
1993ChevroletAstro—Front—
1993ChevroletK3500—FrontBorg Warner 4470
1993ChevroletK3500—FrontBorg Warner 4401
1993ChevroletK3500—N/A—
1993ChevroletK3500—RearBorg Warner 4401
1993ChevroletK3500—RearBorg Warner 4470
1993ChevroletS10—FrontBorg Warner 4472
1993ChevroletS10 Blazer—FrontBorg Warner 4472
1993GMCJimmy—FrontBorg Warner 4472
1993GMCK3500—N/A—
1993GMCK3500—RearBorg Warner 4401
1993GMCK3500—RearBorg Warner 4470
1993GMCSafari—Front—
1993GMCSonoma—FrontBorg Warner 4472
1993OldsmobileBravada—Front—
1992ChevroletAstro—Front—
1992ChevroletK3500—FrontBorg Warner 4470
1992ChevroletK3500—FrontBorg Warner 4401
1992ChevroletK3500—N/A—
1992ChevroletK3500—RearBorg Warner 4401
1992ChevroletK3500—RearBorg Warner 4470
1992ChevroletS10—FrontBorg Warner 4472
1992ChevroletS10 Blazer—FrontBorg Warner 4472
1992GMCJimmy—FrontBorg Warner 4472
1992GMCK3500—N/A—
1992GMCK3500—RearBorg Warner 4401
1992GMCK3500—RearBorg Warner 4470
1992GMCSafari—Front—
1992GMCSonoma—FrontBorg Warner 4472
1992OldsmobileBravada—Front—
1991ChevroletAstro—Front—
1991ChevroletK3500—FrontBorg Warner 4470 w/(F44) Chas.
1991ChevroletK3500—FrontBorg Warner 1370 Exc. F44 Chas.
1991ChevroletK3500—N/ABorg Warner 4470 w/(F44) Chas.
1991ChevroletK3500Extended Cab PickupN/ABorg Warner 1370 w/Dual Rr. Whls.
1991ChevroletK3500—RearBorg Warner 4470 w/(F44) Chas.
1991ChevroletK3500—RearBorg Warner 1370
1991ChevroletS10—FrontBorg Warner 4472
1991ChevroletS10 Blazer—FrontBorg Warner 4472
1991ChevroletV3500—FrontBorg Warner 4470 w/(F44) Chas.
1991ChevroletV3500—FrontBorg Warner 1370 Exc. F44 Chas.
1991ChevroletV3500—N/ABorg Warner 4470 w/(F44) Chas.
1991ChevroletV3500—RearBorg Warner 4470 w/(F44) Chas.
1991ChevroletV3500—RearBorg Warner 1370
1991GMCK3500—N/ABorg Warner 4470 w/(F44) Chas.
1991GMCK3500Extended Cab PickupN/ABorg Warner 1370 w/Dual Rr. Whls.
1991GMCK3500—RearBorg Warner 4470 w/(F44) Chas.
1991GMCK3500—RearBorg Warner 1370
1991GMCS15 Jimmy—FrontBorg Warner 4472
1991GMCSafari—Front—
1991GMCSonoma—FrontBorg Warner 4472
1991GMCV3500—FrontBorg Warner 4470 w/(F44) Chas.
1991GMCV3500—FrontBorg Warner 1370 Exc. F44 Chas.
1991GMCV3500—N/ABorg Warner 4470 w/(F44) Chas.
1991GMCV3500—RearBorg Warner 4470 w/(F44) Chas.
1991GMCV3500—RearBorg Warner 1370
1991OldsmobileBravada—Front—
1990ChevroletAstro—Front—
1990ChevroletK3500—FrontBorg Warner 4470 w/(F44) Chas.
1990ChevroletK3500—FrontBorg Warner 1370 Exc. F44 Chas.
1990ChevroletK3500—N/ABorg Warner 4470 w/(F44) Chas.
1990ChevroletK3500Extended Cab PickupN/ABorg Warner 1370 w/Dual Rr. Whls.
1990ChevroletK3500—RearBorg Warner 4470 w/(F44) Chas.
1990ChevroletK3500—RearBorg Warner 1370
1990ChevroletV3500—FrontBorg Warner 4470 w/(F44) Chas.
1990ChevroletV3500—FrontBorg Warner 1370 Exc. F44 Chas.
1990ChevroletV3500—N/ABorg Warner 4470 w/(F44) Chas.
1990ChevroletV3500—RearBorg Warner 4470 w/(F44) Chas.
1990ChevroletV3500—RearBorg Warner 1370
1990GMCK3500—N/ABorg Warner 4470 w/(F44) Chas.
1990GMCK3500Extended Cab PickupN/ABorg Warner 1370 w/Dual Rr. Whls.
1990GMCK3500—RearBorg Warner 4470 w/(F44) Chas.
1990GMCK3500—RearBorg Warner 1370
1990GMCSafari—Front—
1990GMCV3500—FrontBorg Warner 4470 w/(F44) Chas.
1990GMCV3500—FrontBorg Warner 1370 Exc. F44 Chas.
1990GMCV3500—N/ABorg Warner 4470 w/(F44) Chas.
1990GMCV3500—RearBorg Warner 4470 w/(F44) Chas.
1990GMCV3500—RearBorg Warner 1370
1989ChevroletK3500—FrontBorg Warner 1370 Exc. F44 Chas.
1989ChevroletK3500Extended Cab PickupN/ABorg Warner 1370 w/Dual Rr. Whls.
1989ChevroletK3500—RearBorg Warner 1370
1989ChevroletV3500—FrontBorg Warner 1370 Exc. F44 Chas.
1989ChevroletV3500—RearBorg Warner 1370
1989GMCK3500Extended Cab PickupN/ABorg Warner 1370 w/Dual Rr. Whls.
1989GMCK3500—RearBorg Warner 1370
1989GMCV3500—FrontBorg Warner 1370 Exc. F44 Chas.
1989GMCV3500—RearBorg Warner 1370
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
15580225145818994975918994CHR 18994