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National 303 Manual Transmission Input Shaft Bearing - Outer or Rear Outer
| Brand | National 303 |
|---|---|
| Position | Rear Outer |
| Bore (Inch) | 0.669 |
| Bore (mm) | 17.000 |
| Design | Single Row Radial |
| Inner Race Bore (Inch) | 0.669 |
| Inner Race Bore (MM) | 17.000 |
| Inner Race Radius (Inch) | 0.040 |
| Inner Race Radius (MM) | 1.020 |
| Inner Race Width (Inch) | 0.551 |
| Inner Race Width (MM) | 14.000 |
| Outer Race Outside Diameter (Inch) | 1.850 |
| Outer Race Outside Diameter (MM) | 47.000 |
| Outer Race Radius (Inch) | 1.020 |
| Outer Race Width (Inch) | 0.551 |
| Outer Race Width (MM) | 14.000 |
| Outside Diameter (Inch) | 1.850 |
| Outside Diameter (mm) | 47.000 |
| Part Description | Ball Bearing |
| Series | 300 |
| Type | A-1 |
| Width (Inch) | 0.551 |
| Width (mm) | 14.000 |
| Fits | Daihatsu, Saab, Volkswagen, Jaguar, Daimler, Checker, Ford, Dodge, Chrysler, DeSoto, and Plymouth · 18 vehicles |
OE quality. Built to meet or exceed original equipment standards.
Single-row radial design. Helps deliver smooth, reliable bearing performance.
Ball bearing. A compact transmission bearing for dependable rotation.
Cross-references AMS Automotive 6303, Anchor 3303 and AP Exhaust 7511 for the same application. See all 103.
National 303 Manual Transmission Input Shaft Bearing
National 303 is a manual transmission input shaft bearing built as a single-row radial ball bearing for OE-style service in manual gearboxes. With a 17.000 mm bore, 47.000 mm outside diameter, and 14.000 mm width, it is sized for applications that require precise shaft support and stable rotation.
Key Features
- Manual transmission input shaft bearing for drivetrain repair
- Single row radial design for smooth shaft support
- 17.000 mm bore and 47.000 mm outside diameter
- 14.000 mm width for proper transmission fitment
- Ball bearing construction for consistent load handling
- Built to meet or exceed OE quality standards
Product Details
National 303 is part of the 300 series and is identified as an A-1 type ball bearing. It is engineered to exacting manufacturing standards to deliver dependable performance and extended bearing life in manual transmission service. This bearing is used in applications such as Saab 900 with GM45 or G45 transmission configurations, and in select Chrysler and Dodge heavy-duty clutch pilot bushing applications. The part number 303 is also commonly cross-referenced with Timken 303BB and 303S for the same application.
What This Bearing Helps Address
- Noise from a worn manual transmission input shaft bearing
- Rough or inconsistent shaft rotation inside the transmission
- Excess play at the input shaft support point
- Wear-related drivability issues in manual gearbox service
- Service needs on Saab 900, Chrysler Imperial, and Dodge Dart applications
Installation Notes
Verify bore, outside diameter, width, and transmission type before installation. This bearing is listed for 1984 Saab 900 with G45 transmission, 1985-1990 Saab 900 with GM45 transmission, and select 1958-1960 Chrysler and Dodge heavy-duty clutch pilot bushing applications. Confirm the original bearing dimensions and transmission configuration during teardown to ensure correct replacement. Professional installation is recommended for manual transmission service.
Quality Assurance
National manufactures this bearing to meet or exceed OE quality, using premium bearing construction intended for lasting performance and extended service life. National 303 is built for consistent fit and dependable operation in manual transmission applications.
| Year | Make | Model | Transmission | Position | Notes |
|---|---|---|---|---|---|
| 1990 | Saab | 900 | Manual | Outer | with Saab GM45 Transmission |
| 1989 | Saab | 900 | Manual | Outer | with Saab GM45 Transmission |
| 1988 | Saab | 900 | Manual | Outer | with Saab GM45 Transmission |
| 1987 | Saab | 900 | Manual | Outer | with Saab GM45 Transmission |
| 1986 | Saab | 900 | Manual | Outer | with Saab GM45 Transmission |
| 1985 | Saab | 900 | Manual | Outer | with Saab GM45 Transmission |
| 1984 | Saab | 900 | Manual | Outer | with Saab G45 Transmission |
| 1960 | Dodge | Dart | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1959 | Chrysler | Imperial | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1959 | Chrysler | New Yorker | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1959 | Chrysler | Newport | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1959 | Chrysler | Town & Country | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1959 | Dodge | Lancer | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1958 | Chrysler | Imperial | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1958 | Chrysler | New Yorker | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1958 | Chrysler | Newport | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1958 | Chrysler | Town & Country | — | N/A | Fits heavy duty clutch pilot bushing applications. |
| 1958 | Dodge | Lancer | — | N/A | Fits heavy duty clutch pilot bushing applications. |
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