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National 710217 Differential Pinion Seal - Rear Outer
Differential Pinion Seal for Mazda Rear Axles
National 710217 is a metric differential pinion seal built for rear outer applications on select Mazda vehicles. It uses nitrile sealing material and precise OE-style dimensions to help maintain a tight seal at the pinion area where the driveshaft meets the differential.
Compatible with 1988-1993 Mazda 323, Mazda Protege, and Mazda Miata rear outer applications, National 710217 is sized for vehicles with a 6-inch ring gear and Mazda axle configuration. This seal is a direct-fit service part for restoring proper driveline sealing on the specified models.
Key Features
- Part number: National 710217
- Differential pinion seal / oil seal design
- Nitrile sealing material for dependable fluid control
- Metric dimensions for accurate housing and shaft fit
- Inside diameter: 35.0 mm (1.378 in)
- Outside diameter: 54.1 mm (2.130 in)
- Width: 9.0 mm (0.354 in)
- Overall width with side lip: 14.0 mm (0.551 in)
- Flanged outside diameter: 68.0 mm (2.677 in)
- Housing bore: 54.0 mm (2.126 in)
Detailed Description
National 710217 is part of National’s 710200 series of oil seals and is engineered for driveline sealing service where the pinion shaft passes through the differential housing. The nitrile sealing material is selected for oil resistance and consistent sealing performance in a compact metric profile. This part cross-references Four Seasons 67277 for the same application.
Use National 710217 when servicing rear outer differential pinion seal applications on 1988-1989 Mazda 323, 1990-1991 Mazda Protege, and 1990-1993 Mazda Miata models. The fitment is specific to vehicles with a 6-inch ring gear and Mazda axle setup, making it important to verify the axle configuration before ordering. National 710217 is a practical replacement for restoring the seal at the pinion area on these Mazda driveline assemblies.
Common Issues This Seal May Address
- Gear oil leaking from the differential pinion area
- Fluid seepage around the pinion shaft
- Wet or contaminated differential housing surfaces
- Loss of lubricant caused by a worn pinion seal
- Service replacement during differential maintenance on Mazda rear axles
Installation Notes and Tips
Confirm the vehicle year, model, rear outer position, ring gear size, and Mazda axle configuration before installation. Inspect the pinion yoke and sealing surface for wear or scoring, since surface damage can affect seal life. Clean the housing bore thoroughly and install the seal squarely to avoid distortion. Verify the dimensions against the original seal when servicing a differential pinion seal on Mazda Miata, Mazda Protege, or Mazda 323 applications.
Quality Assurance
National has supplied sealing solutions for more than 75 years and continues to develop OE-style sealing components for modern vehicle service needs. Part number 710217 reflects that experience with a metric oil seal design intended for accurate fitment and dependable driveline sealing.
| Brand | National |
|---|---|
| Part Number | 710217 |
| Flanged Outside Diameter (Inch) | 2.677 |
| Flanged Outside Diameter (MM) | 68.000 |
| Housing Bore (Inch) | 2.126 |
| Housing Bore (MM) | 54.000 |
| Inside Diameter | 1.378 |
| Inside Diameter | 35.000 |
| Material | Nitrile |
| Outside Diameter | 2.130 |
| Outside Diameter | 54.100 |
| Outside Diameter (Inch) | 2.130 |
| Outside Diameter (mm) | 54.100 |
| Overall Width with Side Lip (MM) | 14.000 |
| Overall Width with Side Lip (Inch) | 0.551 |
| Part Description | Oil Seal |
| Sealing Material | Nitrile |
| Series | 710200 |
| Shaft (Inch) | 1.378 |
| Shaft (MM) | 35.000 |
| Thickness | 0.354 |
| Thickness | 9.000 |
| Type | 74 |
| Unit of Dimension | Metric |
| Width (Inch) | 0.354 |
| Width (mm) | 9.000 |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1993 | Mazda | Miata | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
| 1992 | Mazda | Miata | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
| 1991 | Mazda | Miata | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
| 1991 | Mazda | Protege | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
| 1990 | Mazda | Miata | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
| 1990 | Mazda | Protege | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
| 1989 | Mazda | 323 | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
| 1988 | Mazda | 323 | Rear Outer | with 6 (in) Ring Gear; with Mazda Axle |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.