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National 711047 Differential Pinion Seal - Front Outer
National 711047 Differential Pinion Seal
National 711047 is a metric differential pinion seal built for driveline and axle sealing applications where shaft and housing dimensions must match precisely. With a fluoro-elastomer sealing material and OE-style sizing, it supports reliable oil retention at the pinion area on vehicles such as Mercedes-Benz and BMW applications that use this seal format.
Key Features
- Part number: 711047
- Part description: oil seal for differential pinion applications
- Inside diameter: 2.560 in. / 65.000 mm
- Outside diameter: 4.220 in. / 107.200 mm
- Housing bore: 4.213 in. / 107.000 mm
- Thickness: 0.394 in. / 10.000 mm
- Overall width with side lip: 0.630 in. / 16.000 mm
- Material: fluoro-elastomer
- Metric unit of dimension
- Series: 711000
Detailed Description
National 711047 differential pinion seal is engineered around the critical dimensions that matter most in axle sealing: shaft diameter, housing bore, thickness, and overall width. The fluoro-elastomer construction is selected for sealing performance in driveline environments where heat, gear oil, and continuous rotation place steady demands on the seal lip. If you are servicing a differential pinion seal on a Mercedes-Benz or BMW driveline, this part number 711047 provides the dimensional reference needed for a precise replacement.
National has supplied sealing products for decades and continues to develop solutions for modern vehicle systems. This seal is part of the 711000 series and is identified as Type 40, making it a focused replacement for applications that require a metric oil seal with a 65 mm shaft size and 107 mm housing bore.
This part cross-references SKF 25550A for the same application.
What It Helps Address
- Gear oil seepage at the differential pinion area
- Seal wear from shaft rotation and heat exposure
- Leak-related fluid loss around the pinion shaft
- Noise or contamination concerns caused by degraded sealing surfaces
- Replacement needs during differential service on Mercedes-Benz and BMW vehicles
Installation Notes and Tips
Confirm shaft diameter, housing bore, and seal width before installation. Inspect the pinion yoke and sealing surface for grooves, corrosion, or scoring, since surface damage can shorten seal life. Clean the bore thoroughly and install the seal squarely to avoid lip distortion. Verify that the replacement matches the metric dimensions listed for the vehicle application before reassembly.
Quality Assurance
National is a long-established sealing brand with more than 75 years of experience in sealing solutions. The 711047 differential pinion seal reflects that focus on dimensional accuracy and material selection for driveline service.
| Brand | National |
|---|---|
| Part Number | 711047 |
| Inside Diameter | 2.560 |
| Inside Diameter | 65.000 |
| Thickness | 0.394 |
| Thickness | 10.000 |
| Outside Diameter | 107.200 |
| Outside Diameter | 4.220 |
| Housing Bore (Inch) | 4.213 |
| Housing Bore (MM) | 107.000 |
| Material | Fluoro-elastomer |
| Outside Diameter (Inch) | 4.220 |
| Outside Diameter (mm) | 107.200 |
| Overall Width with Side Lip (MM) | 16.000 |
| Overall Width with Side Lip (Inch) | 0.630 |
| Part Description | Oil seal |
| Series | 711000 |
| Shaft (Inch) | 2.560 |
| Shaft (MM) | 65.000 |
| Type | 40 |
| Unit of Dimension | Metric |
| Width (Inch) | 0.394 |
| Width (mm) | 10.000 |
This part fits 0 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|
* 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.