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InMotion WS2377 Engine Crankshaft Seal - RearOE Quality 60-Day Returns
Part #: WS2377

InMotion WS2377 Engine Crankshaft Seal - Rear

Rear
298 vehicles fit this part
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Fitment: Ford and Mercury, Bronco, E-100 Econoline, E-100 Econoline Club Wagon, E-150 Econoline, E-150 Econoline Club Wagon, E-250 Econoline, E-250 Econoline Club Wagon, E-350 Econoline, E-350 Econoline Club Wagon, Econoline, F-100, F-150, F-250, F-250 HD, F-350, Grand Marquis, LTD, LTD Crown Victoria, and Mustang
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Engine Crankshaft Seal for Ford Rear Applications

InMotion WS2377 is a rear engine seal built with fluoro-elastomer material for dependable sealing performance in a wide range of Ford and Mercury applications. It is sized for a 3.75 in. shaft diameter and a 4.501 in. housing bore, with dimensions that support a precise fit in the differential pinion sealing area.

Compatible with rear applications on Ford F-150, F-250, F-350, Bronco, Econoline, Mustang, LTD, and Mercury Grand Marquis models across the listed years, this seal is designed for service where contamination control and leak prevention matter. The WS2377 part number is also a useful reference when matching the correct rear seal for Ford truck and van driveline service.

Key Features

  • Fluoro-elastomer construction for sealing durability
  • Inside diameter: 3.75 in.
  • Outside diameter: 4.506 in.
  • Housing bore: 4.501 in.
  • Thickness and width: 0.362 in.
  • Rear position fitment for listed Ford and Mercury vehicles
  • Part number WS2377 for catalog and service matching

Detailed Product Description

InMotion WS2377 is engineered to create a secure barrier against debris and moisture while helping maintain a tight seal at the differential pinion area. The fluoro-elastomer material is selected for sealing performance in demanding driveline environments, making this rear seal a practical choice for Ford F-100, F-150, F-250, F-350, Bronco, Econoline, E-150, E-250, E-350, LTD, Mustang, and Mercury Grand Marquis applications. If you are servicing a Ford rear differential and need a seal matched by dimensions and application, WS2377 provides the specifications needed for accurate replacement.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

  • Rear differential fluid seepage at the pinion seal area
  • Contamination from road debris and moisture
  • Seal wear from age, heat, and driveline use
  • Loss of sealing integrity during differential service
  • Fitment matching for Ford rear axle maintenance

Installation Notes and Tips

Confirm shaft diameter, housing bore, and rear position before installation. Clean the sealing surface thoroughly and inspect the pinion area for wear, scoring, or contamination that could affect seal life. Verify the vehicle-specific notes in the fitment list, including the 1983 applications marked From 07/11/1983 and the Viton Type listings, before final assembly.

Quality Assurance

Built from fluoro-elastomer material and manufactured to dimensional specifications that support a precise seal interface, InMotion WS2377 is intended for consistent service in rear driveline applications. Use the part number WS2377 when confirming catalog match for Ford and Mercury rear seal replacement.

  • Fits 1997 Ford F-250 HD, rear, Viton Type
  • Fits 1965-1997 Ford F-350, rear, Viton Type
  • Fits 1980-1996 Ford Bronco, rear, Viton Type
  • Fits 1966-1967 Ford Bronco, rear, Viton Type
  • Fits 1975-1996 Ford E-150 Econoline, rear, Viton Type
  • Fits 1984-1996 Ford E-150 Econoline Club Wagon, rear, Viton Type
  • Fits 1975-1982 Ford E-150 Econoline Club Wagon, rear, Viton Type
  • Fits 1975-1996 Ford E-250 Econoline, rear, Viton Type
  • Fits 1984-1996 Ford E-350 Econoline, rear, Viton Type
  • Fits 1975-1982 Ford E-350 Econoline, rear, Viton Type
  • Fits 1984-1996 Ford E-350 Econoline Club Wagon, rear, Viton Type
  • Fits 1977-1982 Ford E-350 Econoline Club Wagon, rear, Viton Type
  • Fits 1984-1996 Ford F-150, rear, Viton Type
  • Fits 1975-1982 Ford F-150, rear, Viton Type
  • Fits 1984-1996 Ford F-250, rear, Viton Type
  • Fits 1965-1982 Ford F-250, rear, Viton Type
  • Fits 1995 Ford Mustang, rear, Viton Type
  • Fits 1983-1991 Ford E-250 Econoline Club Wagon, rear, Viton Type
  • Fits 1977-1980 Ford E-250 Econoline Club Wagon, rear, Viton Type
  • Fits 1987-1991 Ford LTD Crown Victoria, rear, Viton Type
  • Fits 1984-1989 Mercury Grand Marquis, rear, Viton Type
  • Fits 1984-1986 Ford LTD, rear, Viton Type
  • Fits 1965-1972 Ford LTD, rear, Viton Type
  • Fits 1983 Ford E-100 Econoline, rear, From 07/11/1983
  • Fits 1975-1983 Ford E-100 Econoline Club Wagon, rear, Viton Type
  • Fits 1983 Ford E-150 Econoline Club Wagon, rear, From 07/11/1983
  • Fits 1983 Ford E-350 Econoline, rear, From 07/11/1983
  • Fits 1983 Ford E-350 Econoline Club Wagon, rear, From 07/11/1983
  • Fits 1979-1983 Ford F-100, rear, Viton Type
  • Fits 1965-1977 Ford F-100, rear, Viton Type
  • Fits 1983 Ford F-150, rear, From 07/11/1983
  • Fits 1983 Ford F-250, rear, From 07/11/1983
  • Fits 1983 Ford LTD, rear, From 07/11/1983
  • Fits 1983 Mercury Grand Marquis, rear, From 07/11/1983
  • Fits 1969-1982 Ford E-100 Econoline, rear, Viton Type
  • Fits 1965-1967 Ford Econoline, rear, Viton Type
BrandInMotion
Part NumberWS2377
MaterialFluoro-elastomer
Inside Diameter3.75
Thickness0.36199999999999999
Width0.36199999999999999
Outside Diameter4.5060000000000002
Shaft Diameter3.75
Housing Bore4.5010000000000003

This part fits 298 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1997FordF-250 HD5.8LV8RearViton Type
1997FordF-3505.8LV8RearViton Type
1996FordBronco5.8LV8RearViton Type
1996FordE-150 Econoline4.9LL6RearViton Type
1996FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1996FordE-250 Econoline4.9LL6RearViton Type
1996FordE-350 Econoline5.8LV8RearViton Type
1996FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1996FordF-1504.9LL6RearViton Type
1996FordF-2504.9LL6RearViton Type
1996FordF-3505.8LV8RearViton Type
1995FordBronco5.8LV8RearViton Type
1995FordE-150 Econoline4.9LL6RearViton Type
1995FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1995FordE-250 Econoline5.8LV8RearViton Type
1995FordE-350 Econoline4.9LL6RearViton Type
1995FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1995FordF-1504.9LL6RearViton Type
1995FordF-2504.9LL6RearViton Type
1995FordF-3504.9LL6RearViton Type
1995FordMustang5.8LV8RearViton Type
1994FordBronco5.8LV8RearViton Type
1994FordE-150 Econoline4.9LL6RearViton Type
1994FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1994FordE-250 Econoline5.8LV8RearViton Type
1994FordE-350 Econoline4.9LL6RearViton Type
1994FordE-350 Econoline Club Wagon5.8LV8RearViton Type
1994FordF-1505.8LV8RearViton Type
1994FordF-2505.8LV8RearViton Type
1994FordF-3504.9LL6RearViton Type
1993FordBronco5.8LV8RearViton Type
1993FordE-150 Econoline5.8LV8RearViton Type
1993FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1993FordE-250 Econoline4.9LL6RearViton Type
1993FordE-350 Econoline4.9LL6RearViton Type
1993FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1993FordF-1505.8LV8RearViton Type
1993FordF-2505.8LV8RearViton Type
1993FordF-3505.8LV8RearViton Type
1992FordBronco5.8LV8RearViton Type
1992FordE-150 Econoline5.8LV8RearViton Type
1992FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1992FordE-250 Econoline4.9LL6RearViton Type
1992FordE-350 Econoline4.9LL6RearViton Type
1992FordE-350 Econoline Club Wagon5.8LV8RearViton Type
1992FordF-1505.8LV8RearViton Type
1992FordF-2504.9LL6RearViton Type
1992FordF-3504.9LL6RearViton Type
1991FordBronco5.8LV8RearViton Type
1991FordE-150 Econoline4.9LL6RearViton Type
1991FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1991FordE-250 Econoline4.9LL6RearViton Type
1991FordE-250 Econoline Club Wagon5.8LV8RearViton Type
1991FordE-350 Econoline4.9LL6RearViton Type
1991FordE-350 Econoline Club Wagon5.8LV8RearViton Type
1991FordF-1504.9LL6RearViton Type
1991FordF-2504.9LL6RearViton Type
1991FordF-3504.9LL6RearViton Type
1991FordLTD Crown Victoria5.8LV8RearViton Type
1990FordBronco5.8LV8RearViton Type
1990FordE-150 Econoline4.9LL6RearViton Type
1990FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1990FordE-250 Econoline4.9LL6RearViton Type
1990FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1990FordE-350 Econoline4.9LL6RearViton Type
1990FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1990FordF-1505.8LV8RearViton Type
1990FordF-2505.8LV8RearViton Type
1990FordF-3505.8LV8RearViton Type
1990FordLTD Crown Victoria5.8LV8RearViton Type
1989FordBronco4.9LL6RearViton Type
1989FordE-150 Econoline4.9LL6RearViton Type
1989FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1989FordE-250 Econoline5.8LV8RearViton Type
1989FordE-250 Econoline Club Wagon5.8LV8RearViton Type
1989FordE-350 Econoline4.9LL6RearViton Type
1989FordE-350 Econoline Club Wagon5.8LV8RearViton Type
1989FordF-1504.9LL6RearViton Type
1989FordF-2504.9LL6RearViton Type
1989FordF-3504.9LL6RearViton Type
1989FordLTD Crown Victoria5.8LV8RearViton Type
1989MercuryGrand Marquis5.8LV8RearViton Type
1988FordBronco5.8LV8RearViton Type
1988FordE-150 Econoline5.8LV8RearViton Type
1988FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1988FordE-250 Econoline5.8LV8RearViton Type
1988FordE-250 Econoline Club Wagon5.8LV8RearViton Type
1988FordE-350 Econoline5.8LV8RearViton Type
1988FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1988FordF-1504.9LL6RearViton Type
1988FordF-2505.8LV8RearViton Type
1988FordF-3504.9LL6RearViton Type
1988FordLTD Crown Victoria5.8LV8RearViton Type
1988MercuryGrand Marquis5.8LV8RearViton Type
1987FordBronco5.8LV8RearViton Type
1987FordE-150 Econoline4.9LL6RearViton Type
1987FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1987FordE-250 Econoline4.9LL6RearViton Type
1987FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1987FordE-350 Econoline4.9LL6RearViton Type
1987FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1987FordF-1505.8LV8RearViton Type
1987FordF-2505.8LV8RearViton Type
1987FordF-3504.9LL6RearViton Type
1987FordLTD Crown Victoria5.8LV8RearViton Type
1987MercuryGrand Marquis5.8LV8RearViton Type
1986FordBronco4.9LL6RearViton Type
1986FordE-150 Econoline4.9LL6RearViton Type
1986FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1986FordE-250 Econoline4.9LL6RearViton Type
1986FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1986FordE-350 Econoline4.9LL6RearViton Type
1986FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1986FordF-1505.8LV8RearViton Type
1986FordF-2505.8LV8RearViton Type
1986FordF-3505.8LV8RearViton Type
1986FordLTD5.8LV8RearViton Type
1986MercuryGrand Marquis5.8LV8RearViton Type
1985FordBronco4.9LL6RearViton Type
1985FordE-150 Econoline4.9LL6RearViton Type
1985FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1985FordE-250 Econoline5.8LV8RearViton Type
1985FordE-250 Econoline Club Wagon5.8LV8RearViton Type
1985FordE-350 Econoline5.8LV8RearViton Type
1985FordE-350 Econoline Club Wagon5.8LV8RearViton Type
1985FordF-1505.8LV8RearViton Type
1985FordF-2505.8LV8RearViton Type
1985FordF-3504.9LL6RearViton Type
1985FordLTD5.8LV8RearViton Type
1985MercuryGrand Marquis5.8LV8RearViton Type
1984FordBronco5.8LV8RearViton Type
1984FordE-150 Econoline4.9LL6RearViton Type
1984FordE-150 Econoline Club Wagon5.8LV8RearViton Type
1984FordE-250 Econoline5.8LV8RearViton Type
1984FordE-250 Econoline Club Wagon5.8LV8RearViton Type
1984FordE-350 Econoline4.9LL6RearViton Type
1984FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1984FordF-1504.9LL6RearViton Type
1984FordF-2504.9LL6RearViton Type
1984FordF-3505.8LV8RearViton Type
1984FordLTD5.8LV8RearViton Type
1984MercuryGrand Marquis5.8LV8RearViton Type
1983FordBronco4.9LL6RearViton Type
1983FordE-100 Econoline5.8LV8RearFrom 07/11/1983
1983FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1983FordE-150 Econoline4.9LL6RearViton Type
1983FordE-150 Econoline Club Wagon5.8LV8RearFrom 07/11/1983
1983FordE-250 Econoline4.9LL6RearViton Type
1983FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1983FordE-350 Econoline5.8LV8RearFrom 07/11/1983
1983FordE-350 Econoline Club Wagon5.8LV8RearFrom 07/11/1983
1983FordF-1004.9LL6RearViton Type
1983FordF-1505.8LV8RearFrom 07/11/1983
1983FordF-2505.8LV8RearFrom 07/11/1983
1983FordF-3504.9LL6RearViton Type
1983FordLTD5.8LV8RearFrom 07/11/1983
1983MercuryGrand Marquis5.8LV8RearFrom 07/11/1983
1982FordBronco4.9LL6RearViton Type
1982FordE-100 Econoline4.9LL6RearViton Type
1982FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1982FordE-150 Econoline4.9LL6RearViton Type
1982FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1982FordE-250 Econoline4.9LL6RearViton Type
1982FordE-350 Econoline4.9LL6RearViton Type
1982FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1982FordF-1004.9LL6RearViton Type
1982FordF-1504.9LL6RearViton Type
1982FordF-2504.9LL6RearViton Type
1982FordF-3504.9LL6RearViton Type
1981FordBronco4.9LL6RearViton Type
1981FordE-100 Econoline4.9LL6RearViton Type
1981FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1981FordE-150 Econoline4.9LL6RearViton Type
1981FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1981FordE-250 Econoline4.9LL6RearViton Type
1981FordE-350 Econoline4.9LL6RearViton Type
1981FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1981FordF-1004.9LL6RearViton Type
1981FordF-1504.9LL6RearViton Type
1981FordF-2504.9LL6RearViton Type
1981FordF-3504.9LL6RearViton Type
1980FordBronco4.9LL6RearViton Type
1980FordE-100 Econoline4.9LL6RearViton Type
1980FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1980FordE-150 Econoline4.9LL6RearViton Type
1980FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1980FordE-250 Econoline4.9LL6RearViton Type
1980FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1980FordE-350 Econoline4.9LL6RearViton Type
1980FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1980FordF-1004.9LL6RearViton Type
1980FordF-1504.9LL6RearViton Type
1980FordF-2504.9LL6RearViton Type
1980FordF-3504.9LL6RearViton Type
1979FordE-100 Econoline4.9LL6RearViton Type
1979FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1979FordE-150 Econoline4.9LL6RearViton Type
1979FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1979FordE-250 Econoline4.9LL6RearViton Type
1979FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1979FordE-350 Econoline4.9LL6RearViton Type
1979FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1979FordF-1004.9LL6RearViton Type
1979FordF-1504.9LL6RearViton Type
1979FordF-2504.9LL6RearViton Type
1979FordF-3504.9LL6RearViton Type
1978FordE-100 Econoline4.9LL6RearViton Type
1978FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1978FordE-150 Econoline4.9LL6RearViton Type
1978FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1978FordE-250 Econoline4.9LL6RearViton Type
1978FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1978FordE-350 Econoline4.9LL6RearViton Type
1978FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1978FordF-1504.9LL6RearViton Type
1978FordF-2504.9LL6RearViton Type
1978FordF-3504.9LL6RearViton Type
1977FordE-100 Econoline4.9LL6RearViton Type
1977FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1977FordE-150 Econoline4.9LL6RearViton Type
1977FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1977FordE-250 Econoline4.9LL6RearViton Type
1977FordE-250 Econoline Club Wagon4.9LL6RearViton Type
1977FordE-350 Econoline4.9LL6RearViton Type
1977FordE-350 Econoline Club Wagon4.9LL6RearViton Type
1977FordF-1004.9LL6RearViton Type
1977FordF-1504.9LL6RearViton Type
1977FordF-2504.9LL6RearViton Type
1977FordF-3504.9LL6RearViton Type
1976FordE-100 Econoline4.9LL6RearViton Type
1976FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1976FordE-150 Econoline4.9LL6RearViton Type
1976FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1976FordE-250 Econoline4.9LL6RearViton Type
1976FordE-350 Econoline4.9LL6RearViton Type
1976FordF-1004.9LL6RearViton Type
1976FordF-1504.9LL6RearViton Type
1976FordF-2504.9LL6RearViton Type
1976FordF-3504.9LL6RearViton Type
1975FordE-100 Econoline4.9LL6RearViton Type
1975FordE-100 Econoline Club Wagon4.9LL6RearViton Type
1975FordE-150 Econoline4.9LL6RearViton Type
1975FordE-150 Econoline Club Wagon4.9LL6RearViton Type
1975FordE-250 Econoline4.9LL6RearViton Type
1975FordE-350 Econoline4.9LL6RearViton Type
1975FordF-1004.9LL6RearViton Type
1975FordF-1504.9LL6RearViton Type
1975FordF-2504.9LL6RearViton Type
1975FordF-3504.9LL6RearViton Type
1974FordE-100 Econoline4.9LL6RearViton Type
1974FordF-1004.9LL6RearViton Type
1974FordF-2503.9LL6RearViton Type
1974FordF-3503.9LL6RearViton Type
1973FordE-100 Econoline3.9LL6RearViton Type
1973FordF-1004.9LL6RearViton Type
1973FordF-2504.9LL6RearViton Type
1973FordF-3503.9LL6RearViton Type
1972FordE-100 Econoline3.9LL6RearViton Type
1972FordF-1004.9LL6RearViton Type
1972FordF-2503.9LL6RearViton Type
1972FordF-3504.9LL6RearViton Type
1972FordLTD3.9LL6RearViton Type
1971FordE-100 Econoline3.9LL6RearViton Type
1971FordF-1004.9LL6RearViton Type
1971FordF-2503.9LL6RearViton Type
1971FordF-3503.9LL6RearViton Type
1971FordLTD3.9LL6RearViton Type
1970FordE-100 Econoline3.9LL6RearViton Type
1970FordF-1003.9LL6RearViton Type
1970FordF-2503.9LL6RearViton Type
1970FordF-3503.9LL6RearViton Type
1970FordLTD3.9LL6RearViton Type
1969FordE-100 Econoline3.9LL6RearViton Type
1969FordF-1004.9LL6RearViton Type
1969FordF-2503.9LL6RearViton Type
1969FordF-3503.9LL6RearViton Type
1969FordLTD3.9LL6RearViton Type
1968FordF-1004.9LL6RearViton Type
1968FordF-2503.9LL6RearViton Type
1968FordF-3504.9LL6RearViton Type
1968FordLTD3.9LL6RearViton Type
1967FordBronco3.9LL6RearViton Type
1967FordEconoline3.9LL6RearViton Type
1967FordF-1004.9LL6RearViton Type
1967FordF-2503.9LL6RearViton Type
1967FordF-3503.9LL6RearViton Type
1967FordLTD3.9LL6RearViton Type
1966FordBronco3.9LL6RearViton Type
1966FordEconoline3.9LL6RearViton Type
1966FordF-1004.9LL6RearViton Type
1966FordF-2503.9LL6RearViton Type
1966FordF-3503.9LL6RearViton Type
1966FordLTD3.9LL6RearViton Type
1965FordEconoline3.9LL6RearViton Type
1965FordF-1003.9LL6RearViton Type
1965FordF-2504.9LL6RearViton Type
1965FordF-3504.9LL6RearViton Type
1965FordLTD3.9LL6RearViton Type

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