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InMotion WS6358 Wheel Seal - Rear Inner
Rear Inner Differential Pinion Seal for Heavy-Duty Axles
The InMotion WS6358 is a rear inner differential pinion seal built for demanding driveline service. It uses nitrile sealing material, an SAE 1008 spring, and an SAE 1070 seal case to help maintain a tight barrier against moisture and debris at the pinion area.
Compatible With Chevrolet C3500, Chevrolet K3500, GMC C3500, GMC K3500, Chevrolet P30, GMC P3500, and GMC G35/G3500 Van applications listed below, this seal is sized for precise axle service on Spicer 80, Rockwell Standard C100, and H110 axle configurations where specified.
Key Features
- Part number WS6358
- Nitrile sealing material for durable fluid control
- SAE 1008 spring material for consistent sealing pressure
- SAE 1070 seal case material for structural support
- Dimensions: 3.17 in inside diameter, 4.63 in outside diameter, 0.442 in width
- External markings: 3.187 x 4.625 x 0.442
- Rear inner position for differential pinion service
Detailed Description
InMotion WS6358 is engineered as a differential pinion seal that helps keep contaminants out of the differential while retaining lubricant at the pinion interface. The nitrile sealing lip, supported by an SAE 1008 spring, is paired with a metal case for stable fitment in the housing bore. With a housing bore of 4.625 in and shaft diameter of 3.187 in, this seal is sized for accurate installation in the specified rear inner applications. This part number WS6358 is listed for Chevrolet C3500 and K3500, GMC C3500 and K3500, Chevrolet P30, GMC P3500, and GMC G35/G3500 Van driveline service.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Address
- Differential pinion oil leaks at the rear inner seal location
- Contamination from road debris and moisture entering the pinion area
- Seal wear that can reduce lubricant retention
- Service needs on high-load Chevrolet and GMC axle applications
- Fitment-specific replacement for worn pinion seals in Spicer 80, Rockwell Standard C100, and H110 setups
Installation Notes and Tips
Verify axle type, seal dimensions, and the rear inner position before installation. Inspect the pinion shaft surface and housing bore for wear, scoring, or corrosion, since surface damage can affect sealing performance. Clean the sealing area thoroughly and confirm the seal is seated squarely to the specified depth during assembly.
Quality Assurance
InMotion manufactures this seal with specified material and dimensional controls to support consistent driveline service. The WS6358 is built around the listed nitrile, spring, and case materials for repeatable sealing performance in the applications shown.
| Brand | InMotion |
| Part Number | WS6358 |
| Material | Nitrile |
| External Markings | 3.187 x 4.625 x 0.442 |
| Inside Diameter | 3.17 |
| Inside Diameter | 80.400000000000006 |
| Spring Material | Sae 1008 |
| Width | 0.442 |
| Width | 11.2 |
| Outside Diameter | 117.6 |
| Outside Diameter | 4.63 |
| Shaft Diameter | 3.1869999999999998 |
| Shaft Diameter | 81 |
| Weight | 76.430000000000007 |
| Housing Bore | 117.5 |
| Housing Bore | 4.625 |
| Seal Case Material | Sae 1070 |
This part fits 101 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2000 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 2000 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 2000 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 2000 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1999 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1999 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1999 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1999 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1999 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1999 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1998 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1998 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1998 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1998 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1998 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1998 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1997 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1997 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1997 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1997 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1997 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1997 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1996 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1996 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1996 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1996 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1996 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1996 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1995 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1995 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1995 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1995 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1995 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1995 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1994 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1994 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1994 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1994 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1994 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1994 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1993 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1993 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1993 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1993 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1993 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1993 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1992 | Chevrolet | C3500 | Rear Inner | with Spicer 80 Axle |
| 1992 | Chevrolet | K3500 | Rear Inner | with Spicer 80 Axle |
| 1992 | Chevrolet | P30 | Rear Inner | with Spicer 80 Axle |
| 1992 | GMC | C3500 | Rear Inner | with Spicer 80 Axle |
| 1992 | GMC | K3500 | Rear Inner | with Spicer 80 Axle |
| 1992 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1991 | Chevrolet | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1991 | Chevrolet | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1991 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1991 | GMC | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1991 | GMC | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1991 | GMC | P3500 | Rear Inner | with Spicer 80 Axle |
| 1990 | Chevrolet | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1990 | Chevrolet | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1990 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1990 | GMC | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1990 | GMC | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1990 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1989 | Chevrolet | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1989 | Chevrolet | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1989 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1989 | GMC | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1989 | GMC | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1989 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1988 | Chevrolet | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1988 | Chevrolet | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1988 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1988 | GMC | C3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1988 | GMC | K3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1988 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1987 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1987 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1986 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1986 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1985 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1985 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1984 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1984 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1983 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1983 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1982 | Chevrolet | P30 | Rear Inner | with Rockwell Standard C100 Axle |
| 1982 | GMC | P3500 | Rear Inner | with Rockwell Standard C100 Axle |
| 1981 | Chevrolet | P30 | Rear Inner | |
| 1981 | GMC | P3500 | Rear Inner | |
| 1980 | Chevrolet | P30 | Rear Inner | |
| 1980 | GMC | P3500 | Rear Inner | |
| 1979 | Chevrolet | P30 | Rear Inner | |
| 1979 | GMC | P3500 | Rear Inner | |
| 1978 | Chevrolet | P30 | Rear Inner | |
| 1977 | Chevrolet | P30 | Rear Inner | |
| 1976 | Chevrolet | P30 | Rear Inner | |
| 1975 | Chevrolet | P30 | Rear Inner | |
| 1972 | GMC | G35/G3500 Van | Rear Inner | with H110 Axle |
| 1971 | GMC | G35/G3500 Van | Rear Inner | with H110 Axle |
| 1970 | GMC | G35/G3500 Van | Rear Inner | with H110 Axle |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.