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National 471766 Manual Transmission Input Shaft Seal - Front Inner
| Brand | National 471766 |
|---|---|
| Position | Front Inner |
| Footnote | Zero Duplication Part |
| Housing Bore (Inch) | 2.000 |
| Housing Bore (MM) | 50.800 |
| Inside Diameter | 1.250 |
| Inside Diameter | 31.750 |
| Material | Nitrile |
| Outside Diameter | 2.004 |
| Outside Diameter | 50.900 |
| Outside Diameter (Inch) | 2.004 |
| Outside Diameter (mm) | 50.900 |
| Part Description | Oil Seal |
| Redicoat | Yes |
| Sealing Material | Nitrile |
| Series | 470000 |
| Shaft (Inch) | 1.250 |
| Shaft (MM) | 31.750 |
| Thickness | 0.250 |
| Thickness | 6.350 |
| Type | 47 |
| Unit of Dimension | Inch |
| Width (Inch) | 0.250 |
| Width (mm) | 6.350 |
| Fits | Triumph and Ford · 6 vehicles |
Zero duplication part. A direct-fit oil seal for a clean replacement.
Nitrile sealing material. Helps maintain a tight seal with durable flexibility.
Redicoat finish. Adds a protective coating for easier installation.
Cross-references Anchor 8007, Autolite 104 and Baldwin 20018 for the same application. See all 161.
Manual Transmission Input Shaft Seal for Ford Bronco
National 471766 is a manual transmission input shaft seal built for precise sealing performance in select Ford Bronco front inner applications. It uses nitrile sealing material and a Redicoat finish to support reliable oil control at the transmission input shaft.
- Manual transmission input shaft seal for select Ford Bronco applications
- Nitrile sealing material for dependable fluid sealing
- Redicoat finish
- Inside diameter: 1.250 in. / 31.750 mm
- Outside diameter: 2.004 in. / 50.900 mm
- Width: 0.250 in. / 6.350 mm
- Housing bore: 2.000 in. / 50.800 mm
- Zero duplication part
Detailed Product Information
National 471766 is an oil seal in the 470000 series, engineered for the transmission sealing system where the input shaft passes through the housing. The seal measures 1.250 inches on the shaft side, 2.004 inches on the outside diameter, and 0.250 inches in width, with metric equivalents listed for service reference. Its nitrile construction is suited to sealing applications that require consistent contact at the shaft and housing bore.
This part cross-references Dorman - HELP 47056 and Gates 12458 for the same application. It is listed for 1966 Ford Bronco, front inner, 2nd design, with 7.125 in ring gear, 0.25 in width, and Spicer 30-AF axle; and for 1967-1971 Ford Bronco, front inner, with 7.125 in ring gear and Spicer 30-AF axle. National 471766 is a direct-fit reference for these Ford Bronco front inner seal applications.
Common Uses
- Stops transmission oil seepage at the input shaft
- Addresses fluid loss around the housing bore
- Replaces worn or hardened shaft seal material
- Helps correct contamination from an aging seal lip
- Supports service repair on Ford Bronco front inner axle-related seal applications
Installation Notes and Tips
Verify shaft diameter, housing bore, and seal width before installation. Inspect the shaft surface for grooves, corrosion, or wear that could affect sealing performance. Clean the bore thoroughly and seat the seal evenly to avoid distortion. Confirm the vehicle configuration matches the listed Ford Bronco fitment, including ring gear and axle notes, before ordering or installing National 471766.
Quality Assurance
National has supplied sealing solutions for more than 75 years and continues to update its designs for modern vehicle service needs. Part number 471766 is built as a precision sealing component for the specified Ford Bronco applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1971 | Ford | Bronco | Front Inner | with 7.125 (in) Ring Gear; with Spicer 30-AF Axle |
| 1970 | Ford | Bronco | Front Inner | with 7.125 (in) Ring Gear; with Spicer 30-AF Axle |
| 1969 | Ford | Bronco | Front Inner | with 7.125 (in) Ring Gear; with Spicer 30-AF Axle |
| 1968 | Ford | Bronco | Front Inner | with 7.125 (in) Ring Gear; with Spicer 30-AF Axle |
| 1967 | Ford | Bronco | Front Inner | with 7.125 (in) Ring Gear; with Spicer 30-AF Axle |
| 1966 | Ford | Bronco | Front Inner | 2nd Design; with 7.125 (in) Ring Gear; with 0.25 (in) Width; with Spicer 30-AF Axle; 2.0 (in) Outside Diameter |
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