WJB / INMOTION PARTS Standard Replacement Differential Pinion Seal — direct fit for Ford Mustang 4.6L V8 (1996-2010). Genuine quality replacement built to OEM tolerances, ships to all 50 USA states from RevXSC.
Engineered by WJB / INMOTION PARTS as a standard replacement grade differential pinion seal for the 4.6L V8 engine, this WS3604 matches factory mounting points and form factor so install requires no modification. Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle Standard replacement spec — the same dimensions, materials and performance envelope as the original factory part.
Search by any number below — they all match WJB / INMOTION PARTS WS3604:
| Year | Make / Model | Engine | Notes |
|---|---|---|---|
| 1996 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 1997 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 1998 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 1999 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2000 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2001 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2002 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2003 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2004 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2005 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2006 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2007 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2008 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2009 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
| 2010 | Ford Mustang | 4.6L V8 | Rear Outer; w/ 8.8 IN Ring Gear; w/ Ford Axle |
Always replace differential pinion seal components in matched sets where applicable, torque fasteners to factory spec, and inspect adjacent drivetrain components for wear during installation. If you're not sure which variant matches your VIN, send us the last 8 digits of the VIN before checkout and we will confirm fitment.
Is WS3604 a direct replacement?
Yes — WJB / INMOTION PARTS WS3604 is built to OEM form/fit/function for the Ford Mustang 4.6L V8 (1996-2010).
Do you ship to my state?
We ship to all 50 USA states. Tracking is provided.
What's the difference between Economy, Standard Replacement and Heavy Duty?
Economy is the value-priced option for everyday driving; Standard Replacement matches OEM spec; Heavy Duty uses upgraded materials for towing, fleet and severe service.
How can I confirm fitment?
Match year, make, model and engine (1996-2010 Ford Mustang 4.6L V8). When in doubt, send your VIN — we verify before dispatch.
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Note: The product image is for illustrative purposes only. Actual product may vary slightly in appearance, packaging, or labeling. Fitment and specifications are guaranteed to OEM standards.